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Canon NP6251 Service Manual
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Canon NP6251 Service Manual

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Table of Contents

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SERVICE
MANUAL
REVISION 0
FY8-13F0-000
JULY 1997
COPYRIGHT © 1997 CANON INC.
CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIMÉ AU JAPON)
Download service manual and resetter printer at http://printer1.blogspot.com

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Summary of Contents for Canon NP6251

  • Page 1 SERVICE MANUAL REVISION 0 FY8-13F0-000 JULY 1997 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIMÉ AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 2 IMPORTANT THIS DOCUMENTATION IS PUBLISHED BY CANON INC., JAPAN, TO SERVE AS A SOURCE OF REFERENCE FOR WORK IN THE FIELD. SPECIFICATIONS AND OTHER INFORMATION CONTAINED HEREIN MAY VARY SLIGHTLY FROM ACTUAL MACHINE VALUES OR THOSE FOUND IN ADVERTISING AND OTHER PRINTED MATTER.
  • Page 3 This Service Manual contains basic data and figures on the plain paper copier NP6350/NP6251 needed to service the machine in the field. The NP6350/NP6251 is designed to enable full automatic copying work, and comes with the following systems accessories: 1. Stapler Sorter-E2 2.
  • Page 4 Service Manual and all relevant Service Information bulletins and be able to identify and isolate faults in the machine. COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIMÉ AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 5: System Configuration

    (front paper deck + cassette type) Sorter G1 It can automatically sort and group copies. COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIMÉ AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 6 1. GENERAL DESCRIPTION COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIMÉ AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 7: Table Of Contents

    1. Removing the Scanner Drive 4. Movement of the Scanner in Motor ........3-24 Page Separation Mode ....3-9 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIMÉ AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 8 D. Detecting the Waste Toner Feeding 3. Controlling the Activation in Screw (locking) ......4-38 Direct Mode ......4-19 III. DISASSEMBLY AND ASSEMBLY..4-39 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIMÉ AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 9 A. Pick-Up Operation ......5-20 5. Registering Paper Width Basic B. Identifying the Size of Paper in Value.........5-12 the Multifeeder.......5-21 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIMÉ AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 10 (cassette holder)......5-80 7. Fixing Assembly Outlet Delay 1. Removing the Pick-Up Jam...........5-52 Assembly from the Copier..5-80 viii COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIMÉ AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 11 A. Outline ...........6-1 D. Reciprocating Mechanism for B. Fixing Drive Assembly....6-3 the Main Thermistor (TH1) ....6-10 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIMÉ AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 12 2. Removing the Exhaust Fan..7-30 5. Sliding Out the Hopper 3. Removing the Fixing Heat Assembly ........7-18 Exhaust Fan ......7-31 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIMÉ AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 13 3. Changing the Deck Paper 2. Sequence of Operations (deck Size ..........8-32 opening/closing) .......8-12 4. Adjusting the Deck Registration ..8-33 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIMÉ AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 14 CONSUMABLES AND DURABLES.10-2 A. Copier ..........10-6 A. Copier..........10-2 B. Paper Deck-A1 ......10-8 B. Paper Deck-A1 ......10-3 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIMÉ AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 15 14.Adjusting the Position of the 4. Position of the Roller Holding Tray Assembly Side Electrode ........11-21 Guide Plate ......11-34 xiii COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIMÉ AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 16 20.E210 (fault in lens X direction 3. The copy is too light drive system) ......11-96 (entire face)......11-70 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIMÉ AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 17 E. I/O Display Mode ( ) ..11-179 up. (paper deck-A1) ....11-118 F. Adjustment Mode ( ) ..11-215 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIMÉ AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 18 E. SPECIAL TOOLS LIST ....A-9 2. Abbreviations......A-4 F. SOLVENTS AND OILS....A-10 C. GENERAL CIRCUIT DIAGRAM..A-5 not available COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIMÉ AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 19 VI. POINTS TO NOTE (BY THE USER) ..1-19 B. Cross Section ........1-12 VII. IMAGE FORMATION......1-20 OPERATING THE MACHINE.....1-13 A. Outline ...........1-20 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 20: Chapter 1 General Description

    5. When fitted with a side paper deck (accessory), it will hold as many as 7,550 sheets (5,550 sheets if NP6250). COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 21: Specifications

    Separation Corona (static) Cleaning Blade Fixing Heating roller (790 W + 410 W; 120V), (1200W; 220/240V) COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 22: Performance

    279.4×431 mm (11"×17", max.) STMT (min.) Two-sided A: A3 (max.), A5 horizontal (min.) Inch: 279.4×431.8 mm (11"×17", max.), STMT horizontal (min.) COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 23 STMT-R, A5, STMT • Colored paper* (Canon-recommended) B4, A4 *May be used, but may not feed properly. COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 24 • Paper Deck-A1 • Copy Data Controller-A1 Accessory • Stapler Sorter-E2 • Remote Diagnostic Device II COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 25: Others

    Keep wrapped to protect against humidity. Consumables Toner Avoid direct sunshine; keep at 40°C, 85% or under. COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 26 (50%) (70%) Reduce (81%) (86%) (200%) (141%) Enlarge (122%) (115%) Table 1-201 Copying Speed (copier only) COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 27 11" × 17" (121.4%) Table 1-202 Copying Speed (copier only) Specifications subject to change without notice. COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 28: Paper Deck-A1

    DC from copier Operating environment Same as copier Temperature Humidity Specifications subject to change without notice. COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 29: Names Of Parts

    Original tray/Instructions tray Right deck Power switch Left deck Multifeeder Front door Upper right door Figure 1-301 1-10 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 30 Holding tray feeding assembly Fixing/feeding assembly lever Holding tray assembly Toner hopper Holding tray knob Figure 1-302 1-11 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 31: Cross Section

    Holding tray pick-up assembly roller (crescent) roller Pre-exposure lamp Roller electrode Delivery roller Figure 1-303 1-12 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 32: Operating The Machine

    REDUCE DIRECT ENLARGE PAPERSELECT FIT IMAGE ZOOM 2-SIDED SORTER SPECIAL FEATURES LIGHT DARK Figure 1-402 1-13 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 33: Extended Modes

    Use it so that copying is possible only in response to a pre- registered ID (300 max.). Table 1-401 1-14 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 34: User Mode

    ON: Show size input screen. OFF: Do not show size input screen. Table 1-402(a) 1-15 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 35 100%; auto mode. paper select, ON; density control, manual; copy count, 1. Table 1-402(b) 1-16 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 36 Use it to set the time/day of the week for the built-in Used for the clock. weekly timer. Table 1-404 1-17 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 37 Use it to assign specific modes to keys on the 2 max. Standard screen. Table 1-405 1-18 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 38: Routine Maintenance By The User

    Instruct the user to dispose of any empty toner bottle as nonflammable material. Caution: Do NOT throw the cartridges into fire; it can burst or explode. 1-19 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 39: Image Formation

    (multifeeder) Separation claw Pick-up Transfer charging (cassette re-pick up) Separation assembly charging assembly Figure 1-601 1-20 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 40 5. Pre-transfer charging 6. Transfer Multifeeder Registration 8. Fixing 7. Separation Delivery Pick-up Figure 1-602 1-21 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 41 CHAPTER 1 GENERAL DESCRIPTION 1-22 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 42: Basic Operation

    G. Inputs to and Outputs from C. Basic Sequence of Operations..2-4 Accessories ........2-32 D. Main Motor (M1) Control Circuitry..2-11 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 43: Chapter 2 Basic Operation

    Delivery control assembly Holding tray feeding assembly Cassette/paper deck Pick-up feeding assembly Figure 2-101 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 44: Outline Of The Electrical Circuitry

    (IPC communication 2). Figure 2-102 is a block diagram which shows the relationship between the machine’s major circuits. COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 45 RDF controller PCB Sensors/ Micro- switches processor Sorter controller PCB Stapler Sensors/ Micro- sorter switches processor Figure 2-102 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 46: Basic Sequence Of Operations

    *3 Wait-up state ends in 10 sec after the end of potential control to speed up warm-up time. Figure 2-103 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 47: Basic Sequence Of Operations At Power-On (2/2)

    17°C or less for the value within parentheses; for the value outside parentheses, if the surface temperature of the fixing roller is 75°C or more. Figure 2-104 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 48 (auto start) during a wait period, copying starts at the end of LSTR. Table 2-101 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 49: Basic Sequence Of Operations

    *1 Turns off the blanking exposure LEDs corresponding to the potential sensor for potential measurement (V Figure 2-105 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 50 (last SCRV to when the treatment. rotation) main motor stops. Table 2-102 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 51: Basic Sequence Of Operations In Page Separation Mode

    LED lamp Right deck/cassette pick-up clutch (CL14) Scanning lamp (LA1) F orward Reverse Scanner Figure 2-106 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 52 Note: For copy sequences other than the above, see Table 2-102. Table 2-103 2-10 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 53: Main Motor (M1) Control Circuitry

    J111 comparison B4 M1ON MMCLK signal Q156 Master B3 M1FG 2 1/4 division Figure 2-107 2-11 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 54: Operation

    PCB will detect a fault in the clock pulses from the main motor and, as a result, will indicate ‘E010’ and an error message on the control panel. 2-12 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 55: Inputs To The Dc Controller

    J113B-12 assembly 2 paper PS9D (When the light-blocking plate is at PS9.) sensor Figure 2-108 2-13 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 56 PS19 HPLPD lever home is at PS19.) position sensor Holding tray control PCB Figure 2-109 2-14 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 57 Cassette 4 '1'. paper sensor PS29 C4PD (When the light-detecting plate is at PS29.) Figure 2-110 2-15 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 58 '1'. LDEL PS39 sensor (When the light-blocking plate is at PS39.) Figure 2-111 2-16 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 59 PS53.) +24V J103B-7 Potential POTON Sensor Potential See p. 4-4. measurement measurement sensor Figure 2-112 2-17 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 60 J7251-1 J304-4 HV24VU When 24 VU is supplied, '1'. door switch MSW5 detection Figure 2-113 2-18 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 61 When the holding tray unit is J202-1 J113A-14 HTCNT* slid into the copier, '0'. Holding tray unit detection Figure 2-114 2-19 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 62 When the humidity inside the machine increases, the voltage HUM1 decreases. (analog signal) Figure 2-115 2-20 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 63: Outputs From The Dc Controller

    Fixing heater (sub) H2 (120V model only) J643-1 CHON (100V model only) Cassette heater Figure 2-116 2-21 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 64 J112B-2 M3FT M3CL M3BRK Scanner motor M3ON M3F/R M3MD2 M3MD1 M3MD0 M3FG M3FS Figure 2-117 2-22 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 65 CW (forward). charging wire When '1', M6 rotates cleaning motor TSCLM2 CCW (reverse). Figure 2-118 2-23 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 66 While the motor is rotating, alternates between '1' and '0'. Holding tray control PCB Figure 2-119 2-24 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 67 Right deck lifter motor J119B-9 J826-2 LDLMD When '1', M19 turns on. Left deck lifter motor Figure 2-120 2-25 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 68 24 V, full speed rotation. J781-2 J842-1 J201-1 Holding tray control From power supply unit Figure 2-121 2-26 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 69 J805-1 J117A-1 Cassette 3 pick-up CL10 clutch C3PUCD* When '0', CL10 turns on. Figure 2-122 2-27 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 70 CL18 roller 0 drive CL18D* When '0', CL18 turns On. clutch Figure 2-123 2-28 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 71 SL10FD* solenoid normal direction. SL10BD* When '0', SL10 turns on for reverse direction. Figure 2-124 2-29 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 72 SL16BD for normal direction. When '1'1, SL16 turns on for reverse direction. Figure 2-125 2-30 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 73 LED2LD* Blanking LED2ON* exposure J312-1 Power supply for lamp To power supply unit Figure 2-126 2-31 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 74: Inputs To And Outputs From Accessories

    When '0', CC-V turns on. Control card CC-V CCNNT* When '0', the card is detected. Figure 2-127 2-32 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 75 A. Scanner Drive Assembly ....3-24 III. SCANNER DRIVE SYSTEM ....3-6 B. Lens Drive Assembly.....3-32 A. Scanner Movement .......3-6 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 76: Chapter 3 Exposure System

    2. The peripheral speed of the drum is the same as the speed of the movement of the mirror in Direct. Direct Reduce Enlarge Figure 3-101 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 77: Outline Of The Movement

    Lens Original Coy paper (large) (large) Copy paper Original (small) (small) Figure 3-202 (top view) COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 78: Moving The Lens

    J736 J110A Y-HOLD Lens Y motor drive circuit M5A* Lens (Y) motor M5B* Figure 3-203 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 79: Moving Of The Lens

    (PS7) Motor CW/sensor ON Motor CCW Motor ON (direction depends on conditions) Figure 3-204 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 80 Y direction Lens X home position sensor (PS6) Enlarge Reduce DC controller PCB Figure 3-205 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 81: Scanner Drive System

    No. 1 mirror mount Forward No. 2/No. 3 mirror mount DC controller PCB Figure 3-301 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 82: Relationship Between The Scanner Sensors And The Signals

    • Indicates that the scanner has edge 2 sensor reached stream reading (PS4) position. Table 3-301 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 83: Basic Sequence Of Operations

    *1 Moves the lens according to the selected reproduction ratio and copy size. *2 The degree of braking may be adjusted in service mode (*3*). Figure 3-302 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 84: Movement Of The Scanner In Page Separation Mode

    If the 1st and the 2nd pages are reversed using extended mode (Chapter 1), no change will occur except that the order of SCFW2/SCRV2 and SCFW1/SCRV1 is reversed. COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 85: User

    Size of original detected by feeder • Original frame Size of original specified by user erase mode Table 3-302 3-10 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 86: Outline

    60 copies/minute (A4, LTR). 3-11 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 87 The 1st original is delivered from the The 2nd original is delivered from the left. left. Figure 3-305 3-12 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 88: Movement Of The Scanner With The Rdf In Use (A4, 2 Copies)

    Immediately after stream reading, the original is stopped on the copyboard glass, and the remaining sets of copies are made in normal scanning mode (moving scanner). 3-13 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 89 CHAPTER 3 EXPOSURE SYSTEM 3-14 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 90 11) The 1st original is delivered. reading has ended. The scanner returns illuminate the remaining number of originals. to home position. Figure 3-307 3-15 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
  • Page 91 CHAPTER 3 EXPOSURE SYSTEM 3-16 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 92: Scanner Motor (M3) Control Circuit

    Motor rotation SCMCLK M3MD2 speed M3MD1 control circuit M3MD0 J112B J632 M3FS J112B Figure 3-308 3-17 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 93 M3MD0 One-sided copying 204~172 171~144 143~120 119~100 99~79 78~62 61~49 Scanner reverse Table 3-303 3-18 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 94 1 sensor *1 Brakes to slow down. *2 Brakes to stop. Figure 3-309 3-19 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 95: Others

    Original detection signal 2 Copyboard cover detection signal 1 DC controller PCB Figure 3-401 3-20 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 96: Operation

    2. If the copyboard cover is opened (PS5 is off), the cassette containing the maximum size paper will be selected. 3-21 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 97 Sensor 1 Sensor 0 None LTRR × 279.4mm 431.8mm (11" × 17") Table 3-402 3-22 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 98: Disassembly And Assembly

    7. Before sliding out the duplexing unit or the fixing assembly, check to make sure that the front door switch or the power switch is off. 3-23 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 99: Scanner Drive Assembly

    , and disconnect the two connectors ; then, remove the RDF rear right mount Figure 3-501 Figure 3-502 3-24 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 100 When removing the scanner drive motor assembly, be sure to mark the edge of the motor assembly in advance. 3-25 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 101: Routing The Scanner Drive Cable

    Be sure to orient the heat absorbing glass whenever replacing the heat absorbing glass. White paint (rear) (front) 3-26 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 102: Removing The Scanner Drive Cable

    , and disconnect the connector ; then, remove the scanner cooling fan Figure 3-507 3-27 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 103 10) Loosen the tension screw to loosen the scanner cable. Figure 3-510 11) Remove the scanner cable. 3-28 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 104: Adjusting The Tension Of The Scanner Drive Cable

    1) Move the No. 1 mirror mount and the No. 2/No. 3 mirror mount to the left. 2) Set the mirror positioning tool (front, rear; FY9-3011) as shown. Figure 3-512 3-29 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 105: Adjusting The Scanner Home Position

    No. 1 mirror mount Section A (left of wall) Glass support (front) Hole Figure 3-514 3-30 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 106: Positioning The Scanner Locking Solenoid (Sl1)

    Loosen these two screws to adjust once again. Scanner locking solenoid (SL1) Figure 3-515 3-31 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 107: Lens Drive Assembly

    When installing the lens hood, fit the boss of the lens hood in the cut-off of the rail; then, hook at the rear while turning the lens hood clockwise. 3-32 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 108 ; then, detach the lens Y direction drive motor from the support. Figure 3-518 3-33 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 109: Removing The Lens Stage Temporarily

    (Fix the light-blocking belt mount temporarily in place with tape to the lens stage.) Figure 3-520 3-34 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 110: Installing The Light-Blocking Belt Mount

    Set the bobbin, and fix it in place with the mounting screw Figure 3-522 3-35 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 111: Removing The Lens X Direction Drive Motor

    ; then, detach the lens X direction motor from the motor mount. Figure 3-524 3-36 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 112: Attaching The Lens X Direction Drive Belt

    Light-blocking belt 1 Light-blocking belt 3 Light-blocking belt 2 Light-blocking belt 4 Figure 3-526 3-37 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 113: Replacing The Light Blocking Belt

    5) Hook the end of the belt on the lens unit. 3-38 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 114 O. Waste Toner Feeding Assembly..4-72 Controlling the Supply Operation ..4-30 C. Controlling the Developing Bias/Roller Electrode .....4-32 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 115: Chapter 4 Image Formation System

    Copy paper Separation charging wire Transfer charging assembly High-voltage transformer DC controller PCB Figure 4-101 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 116: Control Method

    • Once while making the first copy in photo mode after power-on. Table 4-102 Timing of Potential Control COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 117 (LINT) from the DC controller PCB is corrected, and the potential is measured once again. COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 118: Potential Measurement Circuit

    They are treated as a single entity service part. COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 119 Drum surface potential detection circuit High-voltage Level Micro- generation/ transformer shift processor adjustment circuit circuit circuit Figure 4-104 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 120: Controlling The Intensity Of The Scanning Lamp

    J111B circuit LAON J503-2 Arc circuit J501-1 DC controller PCB Lamp regulator PCB Figure 4-105 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 121: Operation

    RDF. The copier’s AE mode is used, however, when manual feeding is selected. COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 122 AE sensor 1 (S7) is used for left pick-up, while AE sensor 2 (S33) is used for right pick-up (Figure 4-108). AE sensor (S7) AE sensor 2 (S33) Figure 4-108 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 123 Figure 4-109 Points of Measurement on an Original equivalent equivalent Original Lighter Darker density Test Sheet Newspaper Figure 4-110 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 124: Making Checks

    Input will be lighter. Table 4-103 4-10 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 125: Controlling The Primary/Transfer Corona Current

    Variable width pulse oscillator circuit goes OFF. Comparator circuit goes OFF. Drive circuit goes OFF. Primary high-voltage transformer goes OFF. 4-11 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 126 4-12 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 127: Controlling The Transfer Corona Current

    Variable width pulse oscillator goes OFF. Drive circuit goes OFF. Primary transformer goes OFF. 4-13 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 128 4-14 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 129: Controlling The Separation/Pre-Transfer Corona Current

    HVSCT Constant Switching Drive current control circuit circuit circuit J114 J202 HVT.POST.DC Figure 4-113 4-15 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 130: Turning On And Off The Separation/ Pre-Transfer Ii. Corona Current

    HVTAC drive signal (HVP.POST.AC), roller electrode rive signal (ROED), and high- voltage DC drive signal (DCON) generated by the DC controller PCB go ‘1’. 4-16 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 131: Separation Corona Current (Dc Component)

    HVP.POST.DC. Pre-transfer corona current (µA) -330 Voltage level (V) of HVT.POST DC Figure 4-117 4-17 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 132: Of The Separation/Pre-Transfer Corona Current

    *Output from the DC controller PCB (connector of signal name). Table 4-104 Combinations of Transfer/Separation Signals 4-18 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 133: Controlling The Blanking Exposure Lamp (Led)

    (297 mm). 4-19 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 134 (standard) along the middle of the paper. (The width may be adjusted to 20 ±10 mm in service mode.) 20 mm 2 mm (approx.) 2 mm (approx.) Figure 4-119 4-20 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 135: Controlling The Activation In Ae Mode

    LEDs kept on. Blank exposure lamp (LEDs) Potential sensor Photosensitive drum Figure 4-121 4-21 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 136: Drum Heater Circuit

    ‘0’, turning off the drum heater. Drum surface temperature: 42°C Thermal fuse rated temperature: 76°C 4-22 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 137 + -- Trigger circuit heater Triac Thermistor Drum heater controller PCB J01-1 Figure 4-122 4-23 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 138: Idle Rotation Of The Photosensitive Drum And The Developing Cylinder

    The 100V machines are shipped with the drum heater switch (SW3) set to ON (idle rotation mode ON). 4-24 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 139: Cleaning The Primary Charging Wire

    Primary charging wire cleaning motor drive command DC controller PCB (PCLM) J103B-3.4 Primary charging wire cleaning motor (M12) Figure 4-123 4-25 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 140: Pre-Transfer/Transfer/Separation Charging Wire Automatic Cleaning Mechanism

    Pre-transfer charging wire cleaning motor (M13) Wire Wire cleaner Figure 4-124 (pre-transfer charging assembly) 4-26 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 141 Wire Wire cleaner Transfer/separation charging wire cleaner motor (M6) Figure 4-125 (transfer/separation charging assembly) 4-27 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 142: Drum Cleaning Assembly/Developing Assembly

    (M1). 4-28 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 143 Developing clutch Main motor Waste toner case DC controller PCB Figure 4-201 4-29 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 144: Detecting The Level Of Toner And Controlling The Supply Operation

    *3 Drives the hopper for 2.0 sec and then holds it for 1 sec, supplying toner by repeating this sequence. Figure 4-202 4-30 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 145 4-31 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 146: Controlling The Developing Bias/Roller Electrode

    AC component 1500 Vp-p, To execute toner projection. 2700 Hz Table 4-201 4-32 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 147 DC bias : : +600 V : Potential control value (V + 100 V) Figure 4-206 4-33 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 148 DC bias: : +600V : Potential control value (V + 100 V) Figure 4-207 4-34 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 149: Developing Bias Control Circuit

    T402 J114 J202 Switch Drive circuit circuit ROED J114 J202 converter DCBC Figure 4-208 4-35 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 150: Roller Electrode Bias Control Circuit

    The above condition supplies the roller electrode with a bias of about 1000 V; the DC bias is not controlled to a specific voltage. 4-36 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 151 * Output from the DC controller PCB (connector No.). Table 4-202 Combination of Developing DC/Roller Electrode Bias Output Signals 4-37 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 152: Detecting The Waste Toner Feeding Screw (Locking)

    A will slide in the direction of the arrow. Waste toner Figure 4-210 (rear view) 4-38 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 153: Disassembly And Assembly

    1) Remove the copyboard glass retainer, and remove the copyboard glass. 2) Move the No. 1 mirror mount to the center. 4-39 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 154 4-40 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 155: Removing The Thermal Fuse

    3) Remove the two mounting screws , and remove the copyboard glass right retaining plate Figure 4-304 4-41 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 156 6) Remove the two mounting screws , and remove the rear top cover Figure 4-306 4-42 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 157: Pre-Exposure Lamp Unit

    5) Remove the two mounting screws , and remove the blanking exposure assembly rail stay Figure 4-308 4-43 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 158: Blanking Exposure Lamp Assembly

    When removing the blanking exposure lamp assembly, take care so as not to damage the photosensitive drum. 4-44 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 159: Photosensitive Drum

    6) Remove the three mounting screws , and remove the gear plate Figure 4-311 4-45 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 160 You need not remove the bearing at the rear and the gear at the front of the photosensitive drum. 4-46 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 161: Replacing The Drum Heater

    (drum heater) and dirt or damage (drum surface). 4-47 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 162: Potential Sensor Assembly

    (You need not perform this step if the surface temperature of the upper fixing roller is 100°C or less, since wire cleaning will be executed automatically.) 4-48 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 163: Pre-Transfer Charging Assembly

    2) Remove the fixing/feeding front cover. 3) Remove the mounting screw , and remove the fixing guide Figure 4-317 4-49 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 164 Figure 4-318 4-50 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 165: Installing The Transfer/Separation Charging Assembly

    (when sliding it from the front). Figure 4-319 Figure 4-320 Figure 4-321 4-51 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 166 100°C or less, since wire cleaning will be executed automatically.) 4-52 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 167: Charging Wire

    (i.e., do not loosen the mounting screws of both plates at the same time). Figure 4-324 4-53 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 168 Figure 4-326, and twist it. Figure 4-326 4-54 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 169 10) Install the shielding plates (left, right). Caution: For other charging assemblies, install the two lids. 4-55 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 170 4) Free a length (about 5 cm) of wire from the charging wire reel (0.1 mm dia.), and form a loop at the end (2 mm dia.). 4-56 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 171 Check to make sure that the wire is strung at equal intervals (i.e., it is in the groove of the block). 4-57 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 172 A full turn of the screw changes the position of the charging wire by about 0.7 mm. 4-58 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 173 , and remove the blanking exposure rail stay Figure 4-333 6) Clean the primary charging assembly anti-stray sheet Figure 4-334 4-59 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 174: Developing Assembly

    3) Disconnect the connector , and slide out the developing assembly from the copier. Figure 4-336 4-60 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 175 (Before installing the blade, place copy paper on the developing cylinder to protect the cylinder.) 4-61 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 176 , parallel pin , and butting roll (one each). Figure 4-340 4-62 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 177 6) Remove the mounting screw , and remove the polarity positioning plate Figure 4-342 4-63 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 178 Do not leave fingerprints or oils on the surface of the developing cylinder. If any, dry wipe the surface with lint-free paper. (Do not use solvent.) 4-64 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 179 1) Remove the developing assembly, and clean the developing assembly anti-stray sheet Figure 4-346 4-65 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 180: Hopper Assembly

    2) Slide out the hopper assembly to the front. (See p. 7-18.) 3) Remove the mounting screw , and remove the hopper assembly Figure 4-347 4-66 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 181: Drum Cleaner

    3) Remove the four mounting screws , and remove the cleaning blade assembly Figure 4-349 4-67 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 182 1) Butt the cleaning blade against the rear. No gap. Blade retaining plate Figure 4-352 4-68 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 183 (both ends; be sure it will not extend over the inner side of the cleaner housing). Figure 4-354 4-69 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 184 Waste toner to be remove . 4~8mm (front) Toner guide roller Magnet roller Side scraper (front) Figure 4-355b 4-70 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 185: Separation Claw/Separation Claw Drive Assembly

    , and remove the No. 2 insulating plate 3) Remove the screw , and remove the claw holder Figure 4-356 4-71 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 186: Waste Toner Feeding Assembly

    , and remove the waste toner feeding assembly from the waste toner drive assembly. Figure 4-358 4-72 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 187: Pick-Up/Feeding System

    A. Making Two-Sided/Overlay Copies H. Holding Tray Assembly....5-101 (1st side)........5-24 I. Holding Tray Feeding Assembly ...5-118 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 188: Outline

    COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 189 Left deck outlet paper sensor PS22 Multifeeder pick-up sensor PS52 Claw jam sensor PS23 Registration paper sensor Table 5-101 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 190 Left deck Right deck PS27 PS25 PS26 Cassette 3 PS30 PS28 PS29 Cassette 4 Figure 5-101 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 191: Cassette Pick-Up

    Cassette 4 lifter detection signal (C4LTP) J130A-4 J130A-7 Cassette 4 paper detection signal (C4PD) Figure 5-201 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 192: Outline

    Vertical path roller 1 paper sensor (PS33) Registration roller paper sensor (PS23) Registration roller clutch (CL9) Figure 5-202 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 193: Cassette Lifter Operation

    Lifter Figure 5-203 (paper present) Paper sensor Paper detecting lever Lifter Figure 5-204 (paper absent) COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 194 Paper detecting lever Paper sensor/ (PS26/PS29) Lifter Cassette open/ closed sensor (PS50/PS51) (M14/M15) Figure 5-205 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 195: Identifying The Size Of Copy Paper In The Cassette

    Chapter 11 “Registering the Paper Width Basic Value.”) A4/A3 STMT-R STMT-R (139.7mm) (210mm) (297mm) Paper width Figure 5-206 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 196 Paper width detecting VR Width guide (front) Paper length sensor unit Cassette Length guide Figure 5-207 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 197: Markings On The Width Guide Rail

    A4-R LGL/LTR-R FLSC B4/B5 G-LTR × 431.8mm 279.4 (11" × 17")/LTR A3/A4 Table 5-201 5-10 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 198: Paper Size

    165.2 — — — 144.1 A-LTR STMTR — — — Table 5-202 Table 5-203 5-11 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 199: Registering Paper Width Basic Value

    5. Registering Paper Width Basic Value See Chapter 11 (service mode *3*; 'C1-STMTR' through 'MF-A4' under ADJUST). 5-12 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 200: Front Paper Deck Assembly

    J116B-2 Paper path 0 detection signal (PS24D) J116A-2 Right deck pick-up clutch drive command (RDPUCD*) Figure 5-301 5-13 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 201: Pick-Up Operation

    The registration roller controls the copy paper so that its leading edge matches the leading edge of the image on the photosensitive drum. 5-14 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 202: Sequence Of Pick-Up Operations

    Vertical path roller 1 paper sensor (PS33) Vertical path roller 1 drive clutch (CL15) Figure 5-303 5-15 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 203: Lifter Operation

    Deck open/ Paper sensor closed sensor (PS32/PS35) (PS38/PS40) Copy paper Oil damper Figure 5-304 5-16 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 204 : Pick-up roller moves down; the light-blocking plate of the lifter detecting lever rises to leave away from the lifter position sensor (PS31/PS34). Figure 5-305 5-17 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 205: Deck Limit Detection

    Deck limit PS37/ sensor PS39 Figure 5-306 Deck Limit Detection (2 cassettes + left/right deck) 5-18 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 206: Detecting The Presence/Absence Of Paper In The Deck

    The rate of high-speed rotation is about twice the speed of normal rotation. 5-19 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 207: Multifeeder

    To registration Copy paper roller SL10 Separation roller Tray PS22 Figure 5-401 5-20 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 208: Identifying The Size Of Paper In The Multifeeder

    Slide guide (rear) Variable resistor Multifeeder tray Slide guide (front) DC controller PCB Figure 5-402 5-21 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 209: Sequence Of Pick-Up Operations (Multifeeder)

    Scanner motor (M3) Multifeeder pick-up relay solenoid (SL15) Scanner motor reverse rotation (reverse direction) Figure 5-403 5-22 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 210: Controlling The Registration Clutch

    Copy paper ahead of Copy paper behind image image on drum on drum Figure 5-501 5-23 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 211: Making Two-Sided/Overlay Copies

    PS15 Holding tray re-pick up roller Holding tray feeding assembly Pick-up roller Figure 5-601 5-24 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 212: Sequence Of Operations (Two-Sided/Overlay Copies; 1St Side)

    Holding tray re-circulating lever motor (M7) : Motor CW rotation : Motor CCW rotation Figure 5-602 5-25 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 213: Making Two-Sided Copies (2Nd Side)

    Holding tray feeding PS33 assembly PS17 PS14 Pick-up motor DC controller PCB Figure 5-603 5-26 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 214: Sequence Of Operations (Two-Sided Copying; 2Nd Side)

    Holding tray feeding assembly 2 paper sensor (PS9) Registration paper sensor (PS23) Figure 5-604 5-27 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 215: Making Overlay Copies (2Nd Side)

    Holding tray inlet roller Holding tray registration roller Feeding roller Figure 5-605 5-28 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 216: Outline Of Operation

    (CL5) turns off to stop the copy paper. Figure 5-607 5-29 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 217 After reaching the holding tray registration roller, the copy paper is moved to the registration roller through the holding tray feeding assembly. PS14 Figure 5-609 5-30 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 218: Sequence Of Operations (Overlay Copying; 2Nd Side)

    Holding tray feeding assembly 2 paper sensor (PS9) Registration paper sensor (PS23) Figure 5-610 5-31 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 219: Reversal Delivery

    Holding tray reversing clutch Figure 5-611 (clockwise rotation) PS47 PS12 Figure 5-612 (counterclockwise rotation) 5-32 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 220: Sequence Of Reversal Delivery Operations

    External paper delivery sensor (PS10) : Motor CW rotation : Motor CCW rotation Figure 5-613 5-33 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 221: Switching The Paper Size For Two-Sided/Overlay/Reversal Delivery Copies

          PS20 Light-blocking plate Trailing edge PS21 guide plate Figure 5-614 5-34 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 222: Movement Of The Paper Jogging Plate And The Trailing Edge Guide Plate

    Trailing edge guide plate Copy paper Counterclockwise Clockwise Figure 5-616 5-35 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 223: Detecting The Presence/Absence Of Copy Paper

    Copy paper Re-circulating lever Holding tray re-circulating lever home position sensor (PS19) Figure 5-617 5-36 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 224: Re-Pick Up From The Holding Tray

    Separation belt Weight plate Feeding roller Holding tray Copy paper re-pick up roller Figure 5-618 5-37 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 225: Skipping Operation

    • Neither binding mode nor cover mode is selected. • Copy count is '2' or lower. 5-38 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 226: Outline Of Operations

    5th original, 3rd, 1st, 4th, 2nd original Reference: Skipping mode may be disabled in user mode. 5-39 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 227 CHAPTER 5 PICK-UP/FEEDING SYSTEM 5-40 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 228: Skipping Operation (Odd Number Of Originals)

    The 2nd original is not copied (skipped), but is the 2nd copy sheet picked up from the holding tray. returned to the original tray of the RDF. Figure 5-620 5-41 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)

  • Page 229: Skipping Operation (Odd Number Of Originals)

    RDF. and discharged (2nd copy). Figure 5-621 5-42 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
  • Page 230 (skipped), but is returned to the original tray of the RDF. assembly, reversed, and discharged. Figure 5-622 5-43 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
  • Page 231 5-44 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)

  • Page 232: Reversal Delivery

    Figure 5-623b. Figure 5-623b 5-45 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 233: Detecting Jams

    PS49 PS36 Left deck Right deck PS27 Cassette 3 PS30 Cassette 4 Figure 5-701 5-46 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 234 Copy paper does not reach a specific sensor within a specific period of time (delay jam): 1. Registration roller delay jam identified by the registration paper sensor (PS23) 5-47 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 235 14. Fixing assembly separation claw assembly stationary jam identified by the claw jam sensor (PS52) 5-48 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 236: Registration Roller Delay Jam

    Error (PS23) Main motor (M1) I: Varies according to length of paper. Figure 5-703 5-49 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 237: Pick-Up Vertical Path Feeding 0/1 Delay Jam

    (PS33) Pick-up motor (M2) I: Varies according to paper length. Figure 5-705 5-50 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 238: Pick-Up Vertical Path Feeding 2 Through 4 Delay Jam

    (PS30) Pick-up motor (M2) I: Varies according to paper length. Figure 5-707 5-51 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 239: Fixing Assembly Outlet Delay Jam

    Normal Error sensor (PS47) Main motor I: Varies according to paper length. Figure 5-709 5-52 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 240: External Delivery Delay Jam

    Normal Error (PS10) Main motor (M1) I: Varies according to paper length. Figure 5-711 5-53 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 241: Internal Delivery Delay Jam

    Normal Error (PS12) Pick-up motor (M2) I: Varies according to paper length. Figure 5-713 5-54 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 242: Holding Tray Inlet Delay Jam

    Error Normal (PS15) Pick-up motor (M2) I: Varies according to paper length. Figure 5-715 5-55 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 243: Holding Tray Re-Pick Up Delay Jam

    I : In two-sided copying, 0.1 sec. : In overlay copying, varies according to paper length. Figure 5-717 5-56 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 244: Holding Tray Registration Stationary Jam

    (PS9) Holding tray feeding assembly 1 paper sensor (PS8) Pick-up motor (M2) Figure 5-719 5-57 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 245: Holding Tray Feeding 1/2 Stationary Jam

    Jam check Normal Error Left deck outlet paper sensor (PS49) Pick-up motor (M2) Figure 5-721 5-58 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 246: Left Deck Pick-Up Stationary Jam

    0.15 sec or less Jam check Claw jam sensor (PS52) Error Normal Pick-up motor (M2) Figure 5-723 5-59 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 247: Disassembly And Assembly

    CAUTION: Before disassembly or reassembly work, disconnect the accessory (if an accessory is installed) and main body power cord(s). 5-60 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 248: Multifeeder Assembly

    2) Remove the two stop rings each (left, right), two shutters each , and two rollers each. Figure 5-802 5-61 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 249: Installing The Pick-Up Roller

    (silver) is toward the front of the copier. Direction of rotation Collar (silver) Front (copier) Pick-up roller Marking (collar) Figure 5-803 5-62 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 250: Removing The Separation Roller

    2) Remove the two mounting screws , and remove the registration upper roller assembly Figure 5-804 5-63 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 251 Take care when removing the separation roller, as the bushing at the front becomes disengaged. Figure 5-806 5-64 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 252: Removing The Feeding Roller

    Figure 5-807 5-65 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 253: Removing The Multifeeder Paper Sensor

    Figure 5-808 2) Remove the two mounting screws , and remove the grip Figure 5-809 5-66 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 254 5) Remove the two mounting screws , and remove the guide plate Figure 5-812 5-67 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 255: Attaching The Side Guide Timing Belt In The Multifeeder Assembly

    Move the slide volume in the direction of B, and attach the timing belt to the pulley. Timing belt Pulley Rack plate Pulley Section A Side volume Figure 5-814 5-68 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 256: Installing The Feeding Roller Of The Multifeeder

    • If pick-up failure occurs, move the spring in the direction of arrow B. Figure 5-816 5-69 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 257: Position Of The Pick-Up Roller Releasing Solenoid Of The Multifeeder

    0.4 ±0.2 mm. Figure 5-817 Figure 5-818 5-70 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 258: Front Paper Deck Assembly

    Figure 5-820 (left of right deck) Figure 5-820a (right of right deck) 5-71 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 259: Removing The Lifter Cable

    (7 in total), and remove the latch assembly 5) Remove the gear cover from the front right. Figure 5-822a (left) 5-72 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 260 6) Remove the mounting screw at the front, and free the oil damper plate Figure 5-823 5-73 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 261 9) Detach the end of the cable from the pulley. Figure 5-825 5-74 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 262 12) Remove the two mounting screws , and remove the grip assembly Figure 5-828 5-75 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 263 5-76 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 264: Changing The Deck Paper Size

    (front, rear, rear left); then, remove the three guide plates (rear) (front) Figure 5-830 5-77 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 265 4) Place copy paper in the deck, and slide the deck in the machine. 5) Enter the new deck paper size in the copier’s service mode (*5*). 5-78 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 266: Adjusting The Deck Registration

    Figure 5-833. Figure 5-832a (left) Figure 5-832b (right) 0±1.5mm Figure 5-833 5-79 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 267: Right Deck Pick-Up Assembly (Cassette Holder)

    Figure 5-835 5-80 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 268 (silver) is toward the rear. Direction of rotation (rear) Collar (silver) Figure 5-836b 5-81 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 269: Removing The Feeding Roller

    1) Remove the two mounting screws, and remove the feeding guide plate ; then, remove the open/close guide Figure 5-838 5-82 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 270 Keep in mind that color difference, if any, does not indicate different part types. 5-83 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 271: Adjusting The Pressure Of The Separation Roller

    • If pick-up failure occurs, move the spring in the direction of A. Feeding roller Pressure lever Separation roller Pressure spring Figure 5-841 5-84 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 272: Orientation Of The Separation Roller

    If the separation roller is installed in the wrong orientation, interference with the clamping washer can cause problems. 5-85 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 273: Orientation Of The Feeding Roller Of The Cassette/Deck Pick-Up Assembly

    2 is 57.2 ±0.5 mm from the center of the hole A in the solenoid mount. 57.2±0.5mm Figure 5-844 5-86 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 274: Positioning Of The Pick-Up Roller Releasing Solenoid Of The Cassette

    . After making adjustments, enter the paper width basic value in serviced mode (*4*) as instructed in Chapter 11. Figure 5-846 0±1.5mm Figure 5-847 5-87 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 275: Left Deck Pick-Up Assembly

    2) Remove the stop ring from the front and the rear; then, remove the pick-up roller Figure 5-849 5-88 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 276 (silver) is toward the rear of the machine. Direction of rotation (rear) Collar (silver) Figure 5-850b 5-89 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 277: Removing The Feeding Roller

    Note: Take care not to lose the pin from the roller. 5-90 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 278: Orientation Of The Feeding Roller Assembly Of The Left Deck Pick-Up Assembly

    , make sure that the marking “5” faces the front. 5-91 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 279: Pick-Up Vertical Path Roller Assembly

    , and disconnect the connector; then, remove the pick-up vertical path roller assembly Figure 5-855 5-92 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 280: Registration Feeding Assembly

    , and remove the right rail support plate then, remove the registration feeding assembly pressure spring Figure 5-857 5-93 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 281: Removing The Registration Roller (Upper Rubber Roller)

    2) Remove the spring , E-ring , spacer , bushing , and bearing Figure 5-859 5-94 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 282 4) Remove the pre-transfer upper guide , and remove the registration roller (upper rubber roller) Figure 5-860 5-95 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 283: Feeding Assembly

    (one each at left and right), and remove the fixing feeding unit stopper Figure 5-862 (left stopper) 5-96 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 284: Removing The Feeding Belt

    3) Remove the E-ring , spacer , and bearing at the front. Figure 5-864 5-97 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 285 6) Remove the E-ring and bearing at the rear. Figure 5-866 5-98 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 286 8) Remove the two screws , and remove the handle support plate Figure 5-868 5-99 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 287 (front) Figure 5-870 5-100 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 288: Holding Tray Assembly

    Holding tray separation clutch (CL6) Holding tray registration clutch (CL3) Figure 5-871b (rear view) 5-101 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 289: Removing The Holding Tray From The Copier

    Figure 5-872 3) Remove the three mounting screws (front). Figure 5-873 (front) 5-102 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 290: Removing The Holding Tray Registration Paper Sensor

    4) Remove the two mounting screws , and remove the registration paper sensor assembly Figure 5-875 5-103 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 291: Removing The Re-Pick Up Roller

    4) Remove the two mounting screws , and remove the holding tray driver PCB cover Figure 5-877 5-104 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 292: Removing The Holding Tray Y

    3) Remove the two mounting screws , and remove the right rail Figure 5-879 5-105 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 293 Figure 5-881 7) Remove the two mounting screws, and remove the holding tray Y motor. 5-106 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 294: Removing The Y Motor Home

    1) Remove the mounting screw , and remove the inlet assembly front upper cover Figure 5-883 5-107 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 295 3) Remove the two mounting screws , and remove the inlet assembly Figure 5-885 5-108 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 296: Removing The Feeding Roller/Separation Belt Assembly

    4) While opening the left cover , remove the feeding roller/separation belt assembly Figure 5-887 5-109 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 297: Removing The Feeding Roller

    4) Remove the roller from the feeding roller assembly. Figure 5-889 5-110 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 298: Removing The Separation Belt Assembly

    Turn the separation roller adjusting roll so that the distance to the shaft is 32.7 ±0.1 mm. 32.7±0.1mm Figure 5-891 5-111 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 299: Positioning The Holding Tray Paper Deflecting Plate Drive Solenoid

    , and disconnect the two connectors; then, remove the side guide plate assembly Figure 5-893 5-112 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 300: Removing The Holding Tray X Motor

    , and disconnect the connector ; then, remove the rear guide plate assembly Figure 5-895 5-113 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 301: Removing The Holding Tray Paper Jogging Solenoid

    , and disconnect the connector ; then, remove the front guide plate assembly Figure 5-897 5-114 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 302 , two grip rings , and spring pin ; then, remove the solenoid Figure 5-899 5-115 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 303: Installing The Holding Tray Paper Jogging Guide Plate Assembly

    Mark the position of the side guide plate assembly with a scribe, and install it along the marking. Figure 5-901 5-116 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 304: Attaching The Timing Belt Of The Holding Tray Assembly Paper Jogging Guide Plate

    When installing the solenoid, position it so that the stroke (distance between rubber silencer and solenoid edge) is 1.5 ±0.3 mm. 1.5±0.3mm Figure 5-903 5-117 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 305: Holding Tray Feeding Assembly

    , and detach the holding tray feeding assembly from the rail. Figure 5-905 5-118 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 306: Removing The Sensor From The Holding Tray Feeding Assembly

    When installing the holding tray feeding assembly sensor cover, be sure to fit the two springs into the bosses behind the holding tray feeding assembly upper guide. 5-119 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 307 CHAPTER 5 PICK-UP/FEEDING SYSTEM 5-120 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 308: Fixing System

    A. Fixing Assembly ......6-19 E. Reciprocating Mechanism for B. Delivery Assembly ......6-36 the Upper Separation Claw ...6-11 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 309: Outline Of Operations

    The drive of the fixing cleaning belt drive solenoid (SL14) is used to trigger the external delivery sensor (PS10). COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 310 120 V model: 790 W (main) + 410 W (sub) 220/240 V model: 1200 W (main) 2. Thermal switch: 240 ±10°C COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 311: Fixing Drive Assembly

    When the first copy paper moves past the registration paper sensor (PS23), its length is measured and the above control is executed. COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 312 Lower fixing SL16 roller PS12 Fixing drive Clutch solenoid To holding tray Main motor Figure 6-101 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 313: Controlling The Fixing Temperature

    Thermal switch AC driver PCB AC power supply PS52 PS47 Fixing lower roller Figure 6-102 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 314 *Period between another press on the Pre-Heat key and the start of STBY. Table 6-103 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 315 Stream reading 180°C 50 cpm mode 60 cpm stream reading 185°C mode recovery mode Table 6-104 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 316 (200°C) (200°C) 200°C (195°C) 195°C Mode H (17°C~) Mode M, L (12°C~17°C, ~12°C) Figure 6-103 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 317 25% saving 155°C 50% saving 110°C *1 : May be varied in service mode. Figure 6-104 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 318: Reciprocating Mechanism For The Main Thermistor (Th1)

    Fixing assembly cleaning belt drive solenoid (SL14) One-way Thermistor (TH1) Reciprocating cam Upper fixing roller 12mm Thermistor Figure 6-105 6-10 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 319: Reciprocating Mechanism For The Upper Separation Claw

    Separation claw roller Separation claw Reciprocating cam Main motor Internal delivery roller Figure 6-106 6-11 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 320: Ssr Error Detection Circuit For The Fixing Heater

    2.When the front door is opened (FDOD=1). 3.When the power switch is turned off (MSWD=1). 6-12 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 321 CHAPTER 6 FIXING SYSTEM 6-13 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 322: Locking Operation (Fixing/Feeding Unit)

    Fixing/feeding unit locking solenoid (SL13) Fixing/feeding Main motor assembly Locking lever Holding tray assembly Figure 6-108 6-14 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 323: Error Detection Circuit

    At this time, the gate array will communicate to the master CPU the wrong detection and, at the same time, generates the power supply OFF signal. 6-15 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 324: Fixing Heater Error Activation Detection Circuit

    5 sec if it finds an open circuit and cuts off the AC power supply. 6-16 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 325: Motor Error Rotation Detection Circuit

    Master array ENCODER ERROR Detection drive circuit circuit Resetting Resetting To RDF Figure 6-112 6-17 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 326: Disassembly And Assembly

    7. Before sliding out the duplexing unit or the fixing assembly, check to make sure that the front door switch or the power switch is off. 6-18 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 327: Fixing Assembly

    Lower roller Upper roller Figure 6-201 2. Locking Mechanism Fulcrum Locking arm Figure 6-202 6-19 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 328: Removing The Fixing Cleaning Belt

    3) Remove the mounting screw , and remove the fixing upper cover Figure 6-204 6-20 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 329 Be sure to remove the silicone oil collecting in the oil pan found under the cleaning belt feeding roller. 6-21 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 330: Installing The Fixing Cleaning Belt

    Be sure to reset the counter (*6*; ‘WEB’) to ‘0’ after replacing the fixing cleaning belt. 6-22 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 331: Removing The Upper Fixing Unit

    , and remove the flywheel mount Figure 6-210 6) Remove the E-ring , and remove the flywheel Figure 6-211 6-23 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 332 The silicone oil in the silicone oil pan can start to drip during the work; if possible, drain it in advance. Figure 6-213 6-24 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 333: Removing The Fixing Heater

    Figure 6-214 9) Remove the two fastons at the rear. Figure 6-215 6-25 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 334 Since such a condition will lead to jamming of copy paper, make sure not to open the fixing assembly upper unit with force. 6-26 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 335: Installing The Fixing Heater

    8) Remove the two mounting screws , and remove the heater holder at the rear. Figure 6-217 6-27 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 336 10) While paying attention to the thermistor and the thermal switch, remove the upper roller unit Figure 6-219 6-28 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 337: Installing The Upper Fixing Roller

    Figure 6-221a. (rear) (front) Figure 6-221a 6-29 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 338 4) Remove the web. 5) Remove the mounting screw , and remove the oil pan Figure 6-223 6-30 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 339 , and remove the lower separation claw assembly 2 together with its support plate Figure 6-226 6-31 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 340 2) Open the fixing/delivery assembly, and release the spring ; then, remove the upper separation claw Figure 6-228 6-32 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 341 The paper will be stopped halfway once; it will then be automatically discharged in about 10 sec. 5) Measure the nip. 6-33 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 342 0.1 to 0.3 mm (equivalent of four sheets of 64 g/m2 plain paper). Figure 6-230 6-34 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 343 The sub thermistor cannot be replaced in the field. Replace it as part of the sub thermistor unit shown in Figure 6-232. 6-35 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 344: Delivery Assembly

    , and pull out the pin ; then, remove the delivery upper guide Figure 6-234 6-36 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 345 3) Remove the two mounting screws , and remove the delivery roller guide Figure 6-236 6-37 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 346 Figure 6-237 (front) Figure 6-237a (rear) 6-38 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 347 (J108), and remove the sensor. Figure 6-239 6-39 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 348 9) Remove the fixing assembly outlet paper sensor assembly. (See p. 6-39.) 10) Remove the internal delivery roller. 6-40 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 349 R. Power Supply Inlet Assembly..7-54 F. Main Motor Assembly....7-34 G. Fixing/Waste Toner Drive Assembly ........7-35 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 350: Chapter 7 Externals/Auxiliary Mechanisms

    LED Control panel controller PCB Interface unit Display controller memory DC controller PCB Figure 7-101 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 351: Lcd Processing

    RAM data is then sent to the display panel in response to the timing signals generated by the LCD controller. COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 352 Touch panel Key control panel LED display Control panel controller PCB DC controller PCB Figure 7-102 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 353: Automatic Control Of Lcd Contrast

    If the temperature around the control panel lowers, on the other hand, the resistance of the thermistor rises, thereby decreasing the voltage (Vo) supplied to the LCD unit. COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 354: Touch Switch Inputs

    PCB to identify which key has been pressed. Electrode Spacer Film Electrode Glass sheet Figure 7-104 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 355: Fans

    Table 7-201 shows the function of each fan and the filter used and the orientation of the fan, while Table 7-203 shows when each fan turns on. Figure 7-201 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 356 DC controller PCB +24v +12v FMFLL FMHLF Figure 7-202 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 357 CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 358: Power Supply

    38VU supply circuit J305-5 J305-7 12VU Side J308-3 paper 24VA1 deck J308-5 38VU Figure 7-301 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 359: Power Supply Circuit

    Check to make sure that the power plug is disconnected always before working on the DC controller, as for replacement. 7-10 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 360 5VR output timing 12VU output timing 24VU1 output timing 24VU2 output timing Figure 7-302 7-11 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 361: Date/Time Display Power Supply

    Do not recharge, disassemble or dispose of it in fire. Keep the battery out of reach of children and discard any used battery promptly. 7-12 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 362: Disassembly And Assembly

    7. Before sliding out the duplexing unit or the fixing assembly, check to make sure that the front door switch or the power switch is off. 7-13 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 363: External Covers

    Power switch assembly cover (3) Fixing/feeding assembly front cover (3) Hopper cover Connector cover (1) Figure 7-402 7-14 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 364: Removing The Front Door

    ; then, remove the two stoppers Figure 7-403 2) Pull out the pin Figure 7-404 7-15 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 365 2) Remove the three mounting screw , and remove the inside upper cover Figure 7-406 7-16 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 366: Cover

    1) Remove the nine mounting screws , and remove the rear cover Figure 7-408 7-17 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 367: Sliding Out The Hopper Assembly

    5) Disconnect the four connectors , and remove the two mounting screws Figure 7-410 7-18 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 368 Drum shaft Figure 7-411 7-19 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 369 8) Hold the process unit as shown, and remove it. Right hand Left hand Figure 4-413 7-20 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 370: Installing The Process Unit

    Figure 7-415 7-21 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 371: Control Panel

    3) Remove the three screws , and remove the upper right cover Figure 7-417 7-22 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 372 Check to make sure that the connector is connected before installing the hopper assembly. 7-23 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 373 , and remove the inside upper cover ; then, slide in the fixing/feeding assembly. Figure 7-421 7-24 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 374: Removing The Control Panel Pcb

    1) Remove the four mounting screws , and shift the back cover to the right to remove. Figure 7-423 7-25 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 375: Removing The Touch Panel

    3) Remove the five mounting screws , and remove the touch panel. Figure 7-425 7-26 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 376: Removing The Control Panel Controller (Cpu) Pcb

    2) Remove the 13 mounting screws , and remove the numeric keypad Figure 7-427 7-27 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 377: Door Switch Assembly

    2) Remove the three mounting screws , and remove the power supply switch assembly cover Figure 7-429 7-28 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 378: Installing The Drum Heater Switch

    3. Installing the Drum Heater Switch Install the switch so that its right side is in ON position. 7-29 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 379: Fan Unit

    2) Remove the two mounting screws , and disconnect the connector ; then, remove the exhaust fan Figure 7-432 7-30 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 380: Removing The Fixing Heat Exhaust Fan

    PCB; then, remove the three mounting screws , and shift the high-voltage transformer assembly Figure 7-434 7-31 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 381: Removing The Cleaner Fan

    , and disconnect the connector ; then, remove the developing fan assembly Figure 7-436 7-32 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 382: Removing The Feeding Fan

    , and disconnect the two connectors ; then, remove the counter assembly together with the support plate. Figure 7-438 7-33 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 383: Main Motor Assembly

    , detach the belt from the end of the main motor, and remove the main motor Figure 7-439 7-34 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 384: Fixing/Waste Toner Drive Assembly

    4) Remove the cleaner fan and the feeding fan. 5) Remove the waste toner bottle. 7-35 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 385 DC controller PCB, and disconnect the three connectors (J113, J114, J115) and the two relay connectors 7-36 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 386 Be sure to stop up the end with a ball of paper to prevent it. Figure 7-444 7-37 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 387: Main Drive Assembly (Drum/Developing)

    5) Remove the cleaner fan, feeding fan, and developing fan. 6) Remove the fixing/waste toner drive assembly. 7-38 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 388 8) Remove the seven mounting screws , and remove the main drive unit Figure 7-447 7-39 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 389: Vertical Path Drive Assembly

    4) Remove the five mounting screws , and remove the rear right grip assembly Figure 7-449 7-40 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 390 6) Remove the two mounting screws , and remove the harness guide 2 Figure 7-451 7-41 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 391: Pick-Up Drive Assembly

    Figure 7-452 J. Pick-Up Drive Assembly 1. Construction Figure 7-453 7-42 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 392: Removing

    9) Remove the two mounting screws , and remove the deck relay drive assembly Figure 7-454 7-43 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 393: Duplexing Drive (1) Assembly

    Figure 7-455 K. Duplexing Drive (1) Assembly 1. Construction Figure 7-456 7-44 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 394 5) Remove the four mounting screws , and remove the duplexing drive (1) assembly Figure 7-457 7-45 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 395: Lifter Drive Assembly

    5) Remove the three mounting screws , and remove the waste toner bottle support plate Figure 7-459 7-46 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 396 , and remove the three screws ; then, remove the lifter drive assembly Figure 7-460 7-47 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 397: Cassette Pick-Up Drive Assembly

    5) Remove the rear right bottle support plate. 6) Remove the DC controller PCB, and detach the timing belt. 7-48 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 398 8) Remove the five mounting screws , and remove the cassette pick-up drive assembly Figure 7-463 7-49 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 399: Attaching The Drive Belt

    (outer side) the pick- up drive belt. 7-50 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 400: Dc Controller Pcb

    • Record new service mode settings on the service label attached to the front door. 7-51 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 401: Dc Power Supply Assembly

    , and remove the DC power supply PCB together with its mount. Figure 7-467 7-52 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 402: High-Voltage Transformer Assembly

    ; then, remove the two mounting screws , and remove the transformer assembly Figure 7-469 7-53 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 403: Power Supply Inlet Assembly

    4) Disconnect the four connectors , and remove the power supply cord mount Figure 7-470 7-54 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 404: Chapter 8 Paper Deck-A1

    D. Feeding System ......8-44 (compartment) .......8-11 E. Electrical System ......8-49 F. Controlling the Deck Motor....8-13 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 405: Side Paper Deck

    Deck lifter position Q110 DLPD '1'. sensor (When the light-blocking plate is at Q110.) Figure 8-101a COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 406: Inputs To The Side Deck Driver

    (When SW103 is not pressed.) switch +38VU J9-1 +24VU. Power supply +5VR J11-11 +12VU. Copier Figure 8-101b COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 407: Outputs From The Side Deck Driver (1/1)

    24VU J111-2 J103-2 Deck OPEN SL102 solenoid DOPSD* When '0', SL102 goes ON. Figure 8-102 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 408: Pick-Up

    The registration roller controls the copy paper so that its leading edge matches the leading edge of the image on the photosensitive drum. COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 409 DC controller PCB Side deck driver PCB CL101 M101 Q105 CL102 Q106 SL101 Q107 Figure 8-103 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 410: Sequence Of Operations (Deck Pick-Up)

    Deck pick-up sensor (Q107) Deck vertical path sensor (Q106) Deck vertical path clutch (CL101) Figure 8-104 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 411: Detection Of Paper For The Deck

    (*5*; ‘SDK_SZ’). COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 412: Deck Lifter

    At this time, the lifter repeats moving down until the deck lifter lower limit switch (SW103) is pressed each time copy paper is supplied (maximum paper supply position). COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 413 Deck lifter cable Deck lifter lower limit detecting switch (SW103) Lifter Copy paper Figure 8-106 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 414 Lifter lowers, and paper level (white area) increases. Deck lifter Coupling motor M102 Figure 8-107 8-10 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 415: Opening/Closing The Deck

    J8-5 Deck lifter motor drive J2001A J6-1,2 command Direction of OPEN M102 Figure 8-108 8-11 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 416: Sequence Of Operations (Deck Opening/Closing)

    Deck lifter UP * : Varies according to the level of the stack. Figure 8-109 8-12 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 417: Controlling The Deck Main Motor (M101)

    (DMFG) Deck main motor driver PCB *Deck main motor high-speed signal (DMHS) Figure 8-110 8-13 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 418 ON (deck main motor high-speed signal DMHS=0); otherwise, the wrong pick-up/feeding speed will be selected, causing jams. 8-14 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 419: Controlling The Deck Lifter Motor (M102)

    • The deck lifter UP signal (DLUP*) is ‘1’. As result, the lifter starts to move down. 8-15 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 420 Q103 Deck paper supply position sensor Side deck driver PCB DC controller Figure 8-111 8-16 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 421: Detecting Jams

    Q106 Deck vertical path sensor Delay/stationary jam Q107 Deck pick-up sensor Delay/stationary Table 8-201 8-17 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 422: When Copy Paper Is Present At Any Of The Sensors At Power-On, End Of Wait-Up, Or During Standby

    (Q106) Deck main motor (M101) I: Varies according to length of paper. Figure 8-203 8-18 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 423: Disassembly And Assembly

    7. Before sliding out the duplexing unit or the fixing assembly, check to make sure that the front door switch or the power switch is off. 8-19 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 424: External Covers

    Compartment opening/closing switch Vertical path cover (rear) Upper front cover Rear cover Deck releasing grip 8-20 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 425: Removing The

    , and remove the front cover of the deck toward the front. Figure 8-302 8-21 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 426 Install the front cover so that the gap between the front cover and the upper front cover is 3 ±1 mm. Upper front cover Front cover Figure 8-303a 8-22 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 427 Deck front cover Indicator window Drive belt Paper level (white area) increasing Figure 8-304 (front view) 8-23 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 428: Removing The Vertical Path Cover (Rear)

    3) Remove the two screws , and remove the vertical path cover (rear) Figure 8-305 8-24 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 429: Removing The Right Cover

    , and shift the right cover in the direction of the arrow (Figure 8-307) to remove. Figure 8-307 8-25 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 430: Removing The Upper Cover

    , and disconnect the connector ; then, remove the upper front cover Figure 8-309 8-26 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 431 ; then, move the upper cover in the direction of the arrow (Figure 8-310). Figure 8-310 8-27 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 432: Paper Deck

    Compartment left end plate Lower left stay Figure 8-351 8-28 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 433 5) Holding the deck as shown (Figure 8-353), and place it on the stack of paper prepared in step 1). Figure 8-353 8-29 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 434: Removing The Compartment

    2) Detach the deck from the copier, and push down the latch plate of the compartment with a finger to open the compartment. (rear) Figure 8-355 8-30 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 435 6) Place the compartment on the stack of paper prepared in step 1). Figure 8-357 8-31 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 436: Changing The Deck Paper Size

    (1 each), and fix the left/right guide plate to suit the new paper size. Figure 8-359 8-32 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 437: Adjusting The Deck Registration

    . (At this time, refer to line on the latch plate.) (rear left of compartment) Figure 8-360 8-33 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 438: Positioning The Roll

    3 mm from the floor Figure 8-361 8-34 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 439: Removing The Deck Pick-Up Clutch (Cl102)

    , and remove the E-ring ; then, remove the deck vertical path clutch Figure 8-401 8-35 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 440: Removing The Deck Main Motor (M101)

    . (At this time, take care not to damage the gear at the end of the motor spindle.) Figure 8-402 8-36 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 441: Removing The Deck Lifter Motor (M102)

    , and remove the five screws ; then, remove the deck lifter motor unit Figure 8-405 8-37 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 442: Removing The Lifter Cable (Deck Front)

    5) Remove the four screws , and remove the roll support plate Figure 8-407 8-38 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 443 Figure 8-408 8-39 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 444: Removing The Lifter Cable (Deck Rear)

    Line marked Figure 8-409 8-40 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 445 , and remove the five screws ; then, remove the metal plate Figure 8-410 8-41 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 446 8) Remove the five screws , and remove the lifter motor unit Figure 8-412 8-42 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 447: Routing The Lifter Cable

    (height) from the base plate of the compartment to the top face of the lifter to check that the lifter is level. (rear) Figure 8-413 8-43 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 448: Feeding System

    , be sure to tighten the two screws shown in advance. Screws Figure 8-451 8-44 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 449: Removing The Deck Pick-Up Roller

    Direction of rotation (rear) Deck pick-up roller Marking (roller) Collar Marking (collar) Figure 8-453 8-45 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 450 When installing the feeding roller rubber to the feeding roller shaft, make sure that the marking “5” faces the rear. (front) Figure 8-455 8-46 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 451 Keep in mind that color difference, if any, does not indicate different part types. Figure 8-456a 8-47 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 452 Be sure to fix the solenoid in its initial position whenever installing it on its own. Figure 8-458 8-48 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 453: Electrical System

    1) Detach the deck from the copier, and push down the latch plate of the compartment with a finger to open the compartment. (rear) Figure 8-501 8-49 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 454 3) Remove the two screws , and remove the OPEN switch PCB Figure 8-503 8-50 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 455 DIAGNOSTIC DEVICE II....9-56 I. Connecting the RDF Connector ..9-26 A. Installation to the Copier ....9-56 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 456: Chapter 9 Installation

    6. Keep the machine at least 10 cm/3.9 in away from the wall to allow ample space for operation. COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 457 (This is most conspicuous in a low-humidity environment.) COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 458 CHAPTER 9 INSTALLATION Wrong 2 Figure 9-103 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 459: Unpacking And Installing

    3. The machine weighs about 210 kg. Be sure to work in a group of four when lifting it. (front) Remove the cover. *To remove, hold down the stopper. (rear) COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 460: Unpacking

    Then, remove the cardboard sheets (base plates). The machine weighs about 210 kg. COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 461 Check to make sure that all attachments are with the machine, and take out the found in the box. parts and materials. COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 462: Installing The Scanner

    (Keep the fixing in store. You may need it when relocating the machine in the future.) COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 463: Installing The Fixing Assembly

    Remove the tag retaining tape, and Fixing/delivery assembly open the fixing/delivery assembly. Tags COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 464 Remove the two fixing assembly nip Screw (rear) releasing screws. Screw (front) Close the fixing/delivery assembly. COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 465: Installing The Ap Kit And The Charging Assemblies

    Further, be sure that the charging assembly is fully dry. 9-10 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 466 Slide out the hopper assembly to the front, and turn it 90° to the front right. 9-11 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 467 12.) Caution: Free the harness from the edge saddle. Screw Drum fixing Screw screw 9-12 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 468 9-13 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 469 Install the connector covers (3 screws), and close the front door. 9-14 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 470 Do not roll the drum protection sheet. Install the lower rear right cover of the machine. 9-15 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 471: Installing The Copy Tray

    Black gear are engaged. (for tray) Torque limiter E-ring 9-16 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 472: Replacing The Delivery Roller Leaf Spring

    (2 screws), and slide in the fixing/delivery assembly into the machine, and close the front door. 9-17 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 473: Checking The Developing Assembly

    Connector assembly mount. 9-18 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 474 Fix the developing assembly locking unit with a screw. Screw Install door tape multifeeder door with a screw. 9-19 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 475: Installing The Pick-Up Assembly

    If the cassette is set, the spacer is locked in place and makes Spacer removal difficult. 9-20 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 476 Push in the right deck/cassette, and close the upper right cover, lower right cover, and multifeeder. 9-21 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 477: Supplying Toner

    • The toner supply mouth and the toner bottle lock into position. 9-22 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 478 9-23 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 479 • The toner bottle gets unlocked. Marking 9-24 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 480 Pull the toner bottle in the left upward direction, and remove it upward. Close the hopper cover. 9-25 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 481: Connecting The Rdf Connector

    Remove the face plate of the RDF connector. Insert the RDF connector (male) to the connector (female) of the machine. 9-26 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 482 • Enter a number (keypad) to check that the copy count display is correct. (Press the Clear key thereafter.) 9-27 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 483 (about 8 to 10 min). ↓ ↓ Press the Reset key twice to leave service mode. 9-28 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 484 • Check to make sure that paper feeding in the holding tray assembly is normal. 9-29 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 485 As necessary, install the accessories (sorter, etc.) according to their respective Installation Procedure. Fill out the Service Sheet. 9-30 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 486: Relocating The Machine

    C. When moving the machine in and out of the site of installation, be sure to remove the Paper Deck-A1 (accessory). 9-31 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 487: Installing The Control Card V

    2) Remove the three screws at the front of the upper right cover of the machine. Figure 9-402 9-32 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 488 5) Shift the fixing/feeding assembly releasing lever from vertical to horizontal position, and slide out the fixing/feeding assembly Figure 9-405 9-33 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 489 Take care not to damage the surface of the control panel by the chassis of the machine. Figure 9-407 9-34 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 490 5 mm to the right to remove. Figure 9-408 9) Remove the control card inlet face plate Figure 9-409 9-35 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 491 (display hole of the control card). Figure 9-411 9-36 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 492 Further, check to make sure that the connector for the printer is centered over the hole. Figure 9-413 9-37 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 493 Be sure to lead the harness through the harness retainer so that it will not come into contact with the scanner cable or the drive pulley. 9-38 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 494 21) Turn on the machine, and check the operation of the control card. 9-39 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 495: Installing The Copy Data Controller-A1

    × 17, LTR, LGL, STMT), shift it to ON. • To control inch-configuration paper (11 9-40 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 496 ID input, control by paper size, control by toner color, control by copying mode, and control by paper type. Table 9-501 9-41 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 497 If you are connecting a Remote Diagnostic Unit-A1 or a Copy Data Interface Board-B1, i.e., if a Power Supply-A1 is necessary, Fig. 9-504 9-42 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 498 4) If the user will be using a card reader, connect the card reader relay cable to the Copy Data Controller-A1 J4 (9p). Card Reader-A1 relay cable Fig. 9-506 9-43 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 499: Installing To The Copier

    DC controller PCB. Connector for Connector for Copy Data Card Reader-A1(9P) Controller-A1(8P) Fig. 9-508 9-44 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 500 4) Fix the Copy Data Controller-A1 to the copier’s rear cover with four screws. Screws Screws Fig. 9-509 9-45 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 501: Checking The Operation

    Data Controller-A1 turns on. LED1 LED1 LED2 LED3 LED4 LED5 LED6 SW1 ON SW5 ON Fig. 9-511 9-46 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 502 LED2 LED3 LED1 LED2 LED3 LED4 LED5 LED6 SW1 ON SW5 ON Fig. 9-513 9-47 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 503 6) Connect the connector of the Ten Key Pad-A1 to the connector (J3) on the Copy Data Controller-A1. Connector (J3) Connector of the Ten Key Pad-A1 Fig. 9-515 9-48 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 504 2. If ID mode has been stored in the copier’s memory, you can use that ID for the Copy Data Controller-A1. To do so, operate as follows: 9-49 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 505 LED3 LED4 LED5 LED6 LED5 SW1 ON SW5 ON SW1-3 SW1-2 SW1-1 Fig. 9-518 9-50 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 506 Setting a new mode of control clears such data as the unit price, upper limit, counter reading, and ID. Set them again as necessary. 9-51 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 507 1. You cannot make multiple paper size codes for SIZE1 through 4. 2. The counter reading remains intact after changing the size. 9-52 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 508 A1, or the Remote Diagnostic Unit-A1 as an option, see the appropriate Installation Procedure. 9-53 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 509 12) Attach the Switch Settings label to the top cover, and record the setting of each switch on the label. Screw Switch Settings label Top cover Screw Fig. 9-522 9-54 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 510 17) Make sure that no cable is trapped by the casters of the copier or the sorter. 9-55 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 511: Installing The Remote Diagnostic Device Ii

    RDD’s settings data. 1) Remove the two screws to detach the RDD’s top cover Fig. 9-601 9-56 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 512 3) Remove the two screws , and detach the face cover from the copier’s rear cover. Fig. 9-603 9-57 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 513 5) Fix the RDD in place on the copier’s rear cover with four screws ; use the screws that come with the RDD. Fig. 9-605 9-58 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 514 ) for upgrading the RDD, be sure to shift bit 7 of the DIP switch 2 to ON. 9-59 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 515 20 PPS SW3-5 sets dial pulse speed to 10 PPS SW3-6 – reserved Table 9-601 9-60 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 516 See step 9). SW2-8 Table 9-602 LED1 LED2 LED3 BAT1 LED5 LED6 LED4 Fig. 9-611 9-61 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 517 RDD’s PCB to OFF. LED1 LED2 LED3 BAT1 LED5 LED6 LED4 Fig. 9-613 9-62 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 518 You must confirm that the RDD’s settings are correct by calling the service station. 9-63 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 519 Connect the copier’s power plug, and switch it on to make sure that LED 2 (orange) flashes. LED1 LED2 LED3 BAT1 LED5 LED6 LED4 Fig. 9-617 9-64 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 520 Unit’s cable is fixed in place on the cable guide inside the RDD and is not trapped by the top cover 9-65 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 521 CHAPTER 9 INSTALLATION 9-66 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 522 SCHEDULED SERVICING CHART ...10-6 A. Copier ..........10-2 A. Copier ..........10-6 B. Paper Deck-A1 ......10-3 B. Paper Deck-A1 ......10-8 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 523 Note: The above values are all estimates and are subject to change based on future data. Table 10-101 10-1 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 524: Consumables And Durables

    500,000 scraperr Upper fixing roller FB2-7200-000 500,000 Lower fixing roller FB2-7121-000 500,000 Table 10-201a 10-2 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 525: Paper Deck-A1

    * Exercise care during replacement; the pick-up roller of the side paper deck and the pick-up roller of the machine must be oriented differently. Table 10-201c 10-3 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 526: Scheduled Servicing Table

    10-4 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 527 Record the most recent counter reading. Fill out the Service Sheet, and report to the person in charge. 10-5 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 528: Scheduled Servicing Chart

    (developing assembly) Note 1: Take care not to touch the mirrors or the lenses. 10-6 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 529 Upper separation belt Holding tray Separation lower feeding roller Toner supply mouth Hopper Toner receptacle 10-7 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 530: Paper Deck-A1

    500,000 750,000 1,000,000 Pick-up roller Pick-up Feeding roller assembly Separation roller Vertical path, roll 10-8 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 531 A. Copier ..........11-259 VI. ARRANGEMENT AND FUNCTIONS B. RDF-D1 ........11-264 OF ELECTRICAL PARTS ....11-127 C. Sorter...........11-266 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 532 Answer YES or NO to the questions under “Checks,” and take the action indicated accordingly. 11-1 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 533 PCB.” Connect the positive probe of the meter to the terminal marked (+) and the negative probe to the terminal marked (–). 11-2 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 534: Maintenance And Inspection.11-3

    Increase the value of 'VDT-SW'. Turn off and on the machine, and make a copy. 11-3 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 535: Points To Note For Scheduled Servicing

    Moist cloth (Note) Cleaning Re-pick up assembly, Alcohol, lint-free paper Cleaning refreshing roller Re-pick up assembly, Alcohol, lint-free paper Cleaning pick-up roller, registration roller 11-4 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)

  • Page 536: Standards/Adjustments

    Make adjustments so that the image leading edge margin is 4.5 ±1.5 mm when the Test Sheet is copied in Direct. (unit: REGIST:0.1 mm) 4.5±1.5mm Figure 11-202 11-5 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 537: Adjusting The Left/Right Registration (Left/Right Front Deck Paper Deck, Cassette)

    Left/Right Front Paper Deck Adjusting plate Screw Figure 11-204a Adjusting plate Screw Figure 11-204b 11-6 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 538 Scale Latch plate Screws Figure 11-205a (rear left of compartment) 11-7 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 539: Adjusting The Left/Right Registration (Paper Deck-A1)

    ), and change the setting. Increasing the setting increases the rear margin. (unit: 0.1 mm) 11-8 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 540: Executing Ae Automatic Adjustment

    AE_ADJ: 0 ← ( : START) Changes to ‘0’. 8) Press the Reset key twice to end service mode. 11-9 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 541: Adjusting The Ae Slope

    You may press the Copy Start key to make copies. 6) Press the Reset key twice to end service mode. 11-10 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 542: Exposure System

    No. 1 mirror mount Section A of left of wall Glass support (front) Hole Figure 11-208 11-11 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 543: Routing The Scanner Drive Cable

    Steel ball Wind eight times. Fix in place temporaily. Figure 11-209 11-12 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 544: Orientation Of The Heat Absorbing Glass

    ±50 g when the center of the scanner cable is pulled about 10 mm. (rear) 10 mm 10 mm (front) Figure 11-211 11-13 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 545: Adjusting The Position Of The Mirror

    2) Set the mirror positioning tool (front, rear; FY9-3011) as shown. Figure 11-212 Figure 11-213 11-14 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 546: Cleaning The Mirror (No. 5 Mirror)

    Light-blocking belt 1 Light-blocking belt 3 Light-blocking belt 2 Light-blocking belt 4 Figure 11-215 11-15 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 547: Routing The Lens X Direction Drive Belt

    Loosen these two screws to adjust. Scanner locking solenoid Figure 11-217 11-16 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 548: Image Formation System

    5) Cut the twisted charging wire (excess) with a nipper. 11-17 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 549 Take care to avoid deformation (slack) of the charging assembly. Try to tighten the mounting screw (front) on the shielding plate (left, right) earlier. 11-18 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 550: Adjusting The Height Of The Charging Wire

    A full turn changes the position of the charging wire by about 0.7 mm. 11-19 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 551: Adjusting The Position Of The Blanking Exposure Lamp

    6) If the non-image width is not as specified, turn the adjusting screw to adjust the position of the blanking exposure lamp assembly. Adjusting screw Figure 11-222 11-20 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 552: Position Of The Roller Electrode

    Be sure that the side seal does not protrude inside the cleaner housing. Figure 11-224 11-21 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 553: Cleaning The Cleaner Side Scraper

    Remove waste toner collecting here. 4~8mm (front) Toner guide roller Magnet roller Side scraper (front) Figure 11-225a (front) 11-22 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 554 5) When the area cleaned in step 3) has taken on a new coating, repeat steps 3) through 5). 11-23 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 555: Pick-Up/Feeding System

    (silver) faces the rear. Direction of rotation Rear Collar (silver) Figure 11-226a 11-24 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 556: Orientation Of The Cassette/Front Paper Deck Separation Roller

    , be sure that the marking “5” faces the front. Front Figure 11-228 11-25 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 557: Orientation Of The Multifeeder Pick-Up Roller

    Direction of rotation Rear (copier) Collar (gold) Pick-up roller Marking (roller) Marking (collar) Figure 11-229a 11-26 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 558: Rotation Of The Multifeeder Feeding Roller

    , make sure that the marking “5” faces the rear. Front Figure 11-230a 11-27 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 559: Adjusting The Separation Roller Pressure Of The Cassette/Front Paper Deck

    If pick-up failure occurs, move the spring in the direction of arrow A. Feeding roller Locking lever Separation roller Pressure spring Figure 11-231 11-28 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 560: Adjusting The Separation Roller Pressure Of The Holding Tray

    If pick-up failure occurs, move the spring in the direction of B. Figure 11-233 11-29 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 561: Adjusting The Position Of The Pick-Up Roller Releasing Solenoid (Cassette)

    Figure 11-234 11-30 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 562: Adjusting The Position Of The Pick-Up Roller Releasing Solenoid (Front Paper Deck)

    If you are installing the solenoid on its own, be sure to fix it in its initial position. Figure 11-234b 11-31 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 563: Adjusting The Position Of The Pick-Up Roller Releasing Solenoid (Multifeeder)

    0.4 ±0.2 mm when the solenoid is pulled. Figure 11-235 Figure 11-235a 11-32 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 564: Routing The Timing Belt Of The Side Guide (Multifeeder Assembly)

    B in the direction of arrow B, and tighten the mounting screw Figure 11-237 11-33 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 565: Adjusting The Position Of The Holding Tray Paper Deflecting Plate Drive Solenoid

    Mark the position of the side guide plate with a pencil in advance, and install it with reference to the marking. Figure 11-239 11-34 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 566: Adjusting The Position Of The Holding Tray Paper Jogging Plate

    Butt the rack plate of the paper jogging guide plate against section A (open state). Then, attach the timing belt to the pulley. Figure 11-241 11-35 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 567: Adjusting The Position Of The Holding Tray Paper Jogging Plate Solenoid

    Drum drive belt Main motor Registration feeding Fixing/waste toner drive belt drive belt Figure 11-243 11-36 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 568 (outside when viewing from the rear). 11-37 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 569: Fixing System

    To adjust the height of the inlet guide, loosen the fixing screw on the height adjusting support plate. Make checks by removing the lower roller. 11-38 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 570 If you should have loosened it, be sure to adjust it to its initial position with reference to the scale on the fixing assembly mount. 11-39 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 571: Adjusting The Lower Roller Pressure (Nip)

    A3 copy paper is picked up and discharged as shown in Figure 11-246 ready for measurement. 11-40 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 572: Adjusting The Fixing Clutch

    0.1 to 0.3 mm (about 4 sheets of plain paper 64 g/m Figure 11-247 11-41 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 573: Electrical System

    NIP : 0 ← ( : START) PO_CONT : 0 ← ( : START) Changes to ‘1’. 11-42 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 574 Method 1 enables you to check the lever shift circuit on the DC controller, while method 2 enables you to check the potential measurement circuit. 11-43 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 575 When setting the checking electrode to the potential sensor, make sure that the magnet of the checking electrode will not touch the potential sensor cover. 11-44 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 576 10) Remove the potential sensor checking electrode. 11) Install the blanking exposure lamp assembly. 12) Turn on the power switch. 11-45 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 577 CHAPTER 11 TROUBLESHOOTING 11-46 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 578: Checking The Potential System

    Checking the Potential System <Transfer Output> <Scanning Lamp Output> START Select non-potential mode. ( Select potential control mode. 'PO.CONT' '1') Is the ; 'PO.CONT' '0') toner image on the photosensitive drum before transfer normal? Turn on the power switch. Has the image improved? Select non-potential control mode.
  • Page 579 <Primary Output> <Developing Bias Output> Select the primary power supply Select potential control.( limit notation. ( ; 'PLMT') 'PO.CONT' '0') Select Direct mode and 'GLEAM-5' in service mode ( Measure the voltage during Is 'PLMY' '1'? copying between J114A-2 and A- 13 on the DC controller PCB.

  • Page 580: Potential Control System Conversion Table

    –59 –8 4.50 1,137 –61 –12 4.55 1,128 –63 –16 4.60 1,120 –66 –20 11-49 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 581 –127 –132 6.15 –129 –136 6.20 –132 –140 6.25 –134 –143 6.30 –136 –147 11-50 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 582 –198 –260 7.85 –200 –263 7.90 –202 –267 7.95 –204 –271 8.00 –206 –275 11-51 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 583 –268 –387 –270 9.55 –391 9.60 –272 –395 –274 9.65 –398 9.70 –276 –402 11-52 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 584 –321 –485 10.85 –323 –488 10.90 –325 –492 10.95 –327 –496 11.00 –330 –500 11-53 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 585: Checking The Environment Sensor

    Be sure to keep it in an air-tight case with a drying agent for storage. 11-54 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 586 The machine’s motors may start to operate when you turn on or off the sensors; exercise extra caution. 11-55 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 587 When paper is feeding assembly lever removed. 2 paper sensor assembly of PS9 while in standby. 11-56 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 588 When paper is not lever inserted. assembly of PS17 while in standby. 11-57 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 589 0 sensor hand while When the light- in standby. blocking plate is not at PS24. 11-58 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 590 When the light- in standby. blocking plate is not at PS31. 11-59 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 591 When the light- in standby. blocking plate is not at PS38. 11-60 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 592 When the light- in standby. blocking plate is not at PS48. 11-61 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 593 ** Or, put copy paper over the sensor to keep the light-receiving area from light. 11-62 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 594: Registering The Paper Width Basic Value ( 4 ; Cassette/ Multifeeder)

    Perform the steps shown for the cassette 3 and 4; however, you must perform them for A6R, A4R, and A4. Guide Paper Guide Figure 11-250 11-63 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 595: Image Faults

    • If the original is made in light pencil, the copies can be mistaken for “light” copies. 11-64 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 596: Checking The Copyboard Cover, Copyboard Glass, And Standard White Plate

    6. Checking the Paper a. Check to make sure that the paper is of a type recommended by Canon. b. Check to make sure that the paper is not moist. Try copy paper fresh out of package.
  • Page 597 If the copy has an uneven density (between front) or is too light or foggy, perform the “Image Adjustment Basic Procedure” before consulting the troubleshooting tables. 11-66 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 598 CHAPTER 11 TROUBLESHOOTING 11-67 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 599: Sample Image Faults

    CHAPTER 11 TROUBLESHOOTING B. Sample Image Faults not available 11-68 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 600: Troubleshooting Image Faults

    Replace the lamp regulator. Is the End. problem corrected? DC controller Replace the DC controller PCB. 11-69 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 601: The Copy Is Too Light (Including Solid Black)

    Canon may not bring the best results. Cont’d 11-70 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 602 ‘VL1M’ the target value (VDT, Developing bias Check the developing VL1T) ±10V? control bias control system. 11-71 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 603: The Copy Has An Uneven Density (Darker At Front)

    Copy wires once again, and paper check their height. 2. Try replacing copy paper. 11-72 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 604: The Copy Is Foggy. (Overall)

    2. Check the developing assembly. 11-73 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 605: The Copy Has Vertical Fogging

    Fixing assem- Check the fixing bly, Cleaner assembly and the assembly cleaner assembly. 11-74 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 606: The Copy Has Black Lines (Vertical, Fine)

    Check the inlet of the fixing assembly for dirt. 11-75 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 607: The Copy Has White Spots (Vertical)

    Cont’d 11-76 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 608 Check the photosensitive drum to see if it should not be exposed to external light. 11-77 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 609: The Copy Has White Spots (Horizontal)

    Clean the charging Photosensitive of the photosensitive drum? assembly. drum Replace the photosensitive drum. 11-78 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 610: The Copy Has A Soiled Back

    3. Clean the fixing assembly inlet guide. Delivery Clean the delivery roller assembly and the separation claws. 11-79 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 611: The Copy Has Fixing Faults

    Check the upper roller Upper fixing for peeling. 11-80 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 612: 16., 17. The Copy Has Displaced Leading Edge Registration

    Replace the DC DC controller is moving forward? controller PCB. 11-81 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 613: The Copy Is Blurred And Fuzzy

    6 mm? assembly. Drum drive Check the drum drive system system. 11-82 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 614: The Copy Has Horizontal Fogging

    Is the problem corrected? Lens drive Check the operation of assembly the lens drive assembly. 11-83 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 615: The Copy Is Blank

    Does the scanning lamp remain See “The scanning lamp ON during copying? fails to turn on.” 11-84 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 616: Troubleshooting Malfunctions

    Clean the contact area of the ther- End. mistor. Is the problem corrected? Cont’d 11-85 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 617: E001

    AC drive to the DC controller; if normal, replace the DC controller PCB. 11-86 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 618: E002

    Replace the AC driver. Is the End. problem corrected? DC controller Replace the DC controller PCB. 11-87 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 619: E005

    Main motor Replace the main motor. Is the End. (M1) problem corrected? 11-88 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 620: E013

    (SL15). roller drive open circuit? clutch (CL15) 11-89 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 621: E015

    DC controller PCB. Pick-up motor Replace the pick-up motor (M2). End. (M2) Is the problem corrected? 11-90 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 622: E020

    1 and 2. developing assembly? 11-91 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 623: E030 (The Total Copy Counter Fails To Turn On.)

    PCB. Does it change from about 24 V to about 0 V and then to about 24 V? 11-92 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 624: E043 (Paper Deck-A1)

    DC controller PCB to the motor; if normal, replace the DC controller PCB. 11-93 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 625: E050

    PCB PCB. Is the problem corrected? DC controller Replace the DC controller PCB. 11-94 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 626: E202 (The Keys On The Control Panel Are Locked.)

    PS3/4; if normal, replace 1/2 (PS3/4) check the photointerrupters.) PS3/4. DC controller Replace the DC controller PCB. 11-95 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 627: E210 (Fault In Lens X Direction Drive System)

    Turn on and off the power switch. End. Is the problem corrected? Replace the DC controller PCB. 11-96 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 628: E243

    Replace the sorter controller PCB. End. Is the problem corrected? DC controller Replace the DC controller PCB. 11-97 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 629: E800

    DC controller to the power switch (SW1); if normal, replace the DC controller PCB. 11-98 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 630: Ac Power Is Absent

    AC power supply line. and ∞Ω when turned off? Check the connectors for poor contact. 11-99 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 631: Dc Power Supply Is Absent

    +10%,-7% However, the above assumes that the inaccuracy of the AC input is ±10%. 11-100 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 632: Pick-Up Fails. (Deck Pick-Up; Front Paper Deck + Cassette)

    Copy Start key is pressed? right deck; replace the clutch. Cl16, left deck) 11-101 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 633: The Deck Lifter Fails To Move Up

    0 to 24 V when the DC controller Replace the DC deck is slid into the machine? controller PCB. 11-102 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 634: Pick-Up Fails. (Cassette Pick-Up)

    Does the feeding/separation roller rotate when the Copy Start key is pressed? Cont’d 11-103 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 635 ). Is the sensor normal? Pick-up Remove the pick-up assembly assembly, and check the spring. 11-104 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 636: The Lifter Fails To Move Up

    0 controller PCB. to 24 V when the cassette is slid M14:J119A-9 M15:J119A-11 11-105 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 637: Pick-Up Fails. (Multifeeder)

    24 V and then to 0 V when the controller PCB. Copy Start key is pressed? 11-106 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 638: The Vertical Path Roller Fails To Rotate

    24 to 0 V as soon as the DC controller Replace the DC registration roller starts to rotate? controller PCB. 11-107 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 639: The Scanner Fails To Move Forward

    5 V when the the scanner motor; if scanner stops moving forward? normal, replace the scanner motor. 11-108 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 640: The Blanking Exposure Lamp Fails To Turn On

    Start key is pressed? the pre-exposure lamp PCB; if normal, replace the pre-exposure lamp. 11-109 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 641: The Scanning Lamp Fails To Turn On

    2. Check the DC harness from the DC controller PCB to the lamp regulator. 11-110 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 642: The Hopper Motor (M10) Fails To Operate

    Is the connection of relay connec- Connect the connectors tors J770 and J719 secure? correctly. 11-111 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 643: The Hopper Motor (M11) Fails To Operate

    Replace the drum heater probes are connected to both controller PCB controller PCB. terminals of the heater? 11-112 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 644: The Lens Fails To Move

    135 (M5) J110A-13 J110A-14 J110A-10 J110A-12 J110A-11 J110A-12 about 48 J110A-13 J110A-12 J110A-14 J110A-12 11-113 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 645: The Add Toner Indicator Fails To Turn On

    DC controller 1. Replace the DC PCB/Control controller PCB. panel 2. Replace the control panel. 11-114 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 646: The Set Control Card Message Fails To Turn Off

    11-115 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 647: The Fixing Heater Fails To Operate

    PCB. Heater (–) Main heater (H1) J102B-5 J102B-1 Sub heater (H2) J102B-3 J102B-1 11-116 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 648: Pick-Up Fails. (Paper Deck-A1)

    Copy Start key is pressed? clutch (CL102, the clutch. pick-up; CL101, vertical path) 11-117 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 649: The Deck Lifter Fails To Move Up. (Paper Deck-A1)

    0 V when the deck is opened, 5 V 11-118 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 650: Troubleshooting Feeding Problems

    You can check the location and the type of jam using ‘B_JAM’ in service mode ; eight most recent jams). Figure 11-501 11-119 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 651: Pick-Up Assembly

    Is the pick-up roller deformed or Replace the pick-up worn? roller. Guide plate Check the guide plate for deformation. 11-120 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 652: Separation/Feeding Assembly

    Feeding fan Check the feeding fan to see if it is operating normally. 11-121 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 653: Fixing/Delivery Assembly

    Replace the holding tray ing clutch (CL4) rotate at the correct timing? reversing clutch (CL4). 11-122 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 654: Cleaning Assembly

    Is the holding tray inlet paper Replace the sensor inlet paper sensor (PS15) normal? (PS15). sensor (PS15) 11-123 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 655: Holding Tray Assembly (Re-Pick Up)

    DC controller PCB to (CL4) the holding tray reversing clutch (CL4); if normal, replace the clutch (CL4). 11-124 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 656: Holding Tray Feeding Assembly

    2 paper sensor (PS9) Holding tray normal? feeding assem- bly 2 paper sensor (PS9) 11-125 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 657: Feeding Faults

    Upper/lower Try replacing the upper roller and lower rollers one after the other. 11-126 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 658: Arrangement And Functions Of Electrical Parts

    CHAPTER 11 TROUBLESHOOTING VI. ARRANGEMENT AND FUNCTIONS OF ELECTRICAL PARTS 11-127 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 659: Sensors

    PS52 PS11 PS47 PS53 PS10 PS12 PS19 PS21 PS14 PS20 PS17 PS15 Figure 11-601 11-128 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 660 SVR2 Cassette 3 paper width detection SVR3 Cassette 4 paper width detection Table 11-601 11-129 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 661 CHAPTER 11 TROUBLESHOOTING PS37 PS32 PS31 PS49 PS38 PS39 PS34 PS35 PS40 Figure 11-602 11-130 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 662 Left deck open/closed detection PS49 Left deck pick-up assembly outlet paper detection Table 11-602 11-131 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 663 B. Swithes and Solenoids SL10 SL15 SL2 SW2 MSW5 SL14 MSW4 SL13 SL11 SL12 Figure 11-603 11-132 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 664 Waste toner feeding screw locked detection MSW5 Multifeeder door switch Power switch Door switch Drum heater switch Table 11-603 11-133 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 665 CHAPTER 11 TROUBLESHOOTING Figure 11-604 11-134 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 666 Function Solenoid Right deck pick-up roller release Left deck pick-up roller release Table 11-604 11-135 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 667: Motors And Fans

    CHAPTER 11 TROUBLESHOOTING C. Motors and Fans Figure 11-605 11-136 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 668 Pre-transfer charging wire cleaning motor Cassette 3 lifter motor Cassette 4 lifter motor Table 11-605 11-137 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 669: Clutches

    CL17 Vertical path roller 2 drive CL18 Vertical path roller 0 drive Table 11-606 11-138 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 670 Left deck lifter drive Clutch CL14 Right deck pick-up CL16 Left deck pick-up Table 11-607 11-139 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 671: Lamps, Heaters, And Photosensors

    CHAPTER 11 TROUBLESHOOTING E. Lamps, Heaters, and Photosensors MFSVR CNT2 CNT1 THHUM1 Figure 11-608 11-140 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 672 Fixing heater thermal switch Thermal fuse Scanning lamp thermal fuse Drum heater thermal fuse Table 11-608 11-141 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 673: Pcbs

    CHAPTER 11 TROUBLESHOOTING F. PCBs Figure 11-609 11-142 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 674 DC power supply PCB DC power supply Service switch PCB Service mode switching Table 11-609 11-143 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 675: Paper Deck-A1

    Q110 Q108 SW100 Q106 Q102 Q103 SW102 Q107 SW103 Q104 Figure 11-610a (paper deck-A1) 11-144 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 676 Deck open detecting switch SW103 Deck lifter lower limit detecting switch Table 11-610a (paper deck-A1) 11-145 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 677: Motors, Clutches, Solenoids, And Pcbs

    2. Motors, Clutches, Solenoids, and PCBs SL101 CL101 CL102 M101 SL102 M102 Figure 11-610b (paper deck-A1) 11-146 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 678 Deck open solenoid Side deck driver PCB Open switch PCB Table 11-610b (paper deck-A1) 11-147 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 679: Variable Resistors (Vr), Light-Emitting Diodes (Led), And Check Pins By Pcb

    A1 A12 J117 J118 J119 J121 J122 B13 B1 B15 B1 B15 B1 Figure 11-611 11-148 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 680 129.4% LGL→11"×17" 121.4% 100% 100.0% LGL→LTR 78.6% LGL→11"×17" 73.3% 11"×17"→LTR 64.7% 50.0% Table 11-613 11-149 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 681 J123 For factory J125 For factory J126 For factory J129 For factory Table 11-616 11-150 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 682: Ac Driver Pcb

    3. DC Power Supply PCB J311 J305 J304 J306 J303 J301 J309 J308 J302 Figure 11-613 11-151 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 683: Control Cpu Pcb

    4. Control CPU PCB J923 J911 J915 J916 J913 J912 J920 J919 Figure 11-614 11-152 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 684: Holding Tray Driver Pcb

    5. Holding Tray Driver PCB J201 J203 J202 J204 J205 J210 J209 J208 J207 J206 Figure 11-615 11-153 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 685: Potential Measurement Pcb

    Table 11-617 Description LED1 ON while drum surface potential is being measured. Table 11-618 11-154 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 686: Hvt1 Pcb

    J301 J403 VR201 J203 J201 J202 Figure 11-617 Description VR201 For factory Table 11-619 11-155 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 687: Hvt2 Pcb

    T502 J404 J402 J401 T501 Figure 11-618 9. Inverter PCB J956 J955 Figure 11-619 11-156 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 688: Lamp Regulator Pcb

    Assumes that the sub counter is a two-sided copy counter. Assumes that the sub counter is a large-size copy counter. Table 11-620 11-157 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 689: Side Deck Driver (Paper Deck-A1)

    CHAPTER 11 TROUBLESHOOTING 12. Side Deck Driver (paper deck-A1) J103 Figure 11-622 11-158 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 690: Service Mode

    When you have selected a mode, you will find a specific page reference number in the upper right corner of the display. 11-159 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 691: Using Service Mode

    RAM on the control PCB. By the same token, you must record any new values you entered in the field on this label. 11-160 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 692 A4_PSZ C2_STMTR A4R_PSZ C2_A4R A5_PSZ C3_STMTR B4_PSZ C3_A4R B5_PSZ C4_STMTR B5R_PSZ C4_A4R Table 11-702 11-161 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 693: Display Mode

    ‘2’ when it 1: error has reached the lower limit. 2: error 11-162 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 694 11-163 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 695 Indicates the VD (dark area potential) target value. Unit: V Indicates the VD (dark area potential) measured Unit: V value. 11-164 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 696 Indicates the DC value of the developing bias. • Indicates ‘0’ when the HVT unit turns off. 11-165 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 697 Indicates the output of the original size sensor 3. DCMET-4 Indicates the output of the original size sensor 4. 11-166 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 698 *3: For ‘B-JAM’, JAM associated with the RDF is limited to ‘0700’. For details, see the next screen (DF- JAM). 11-167 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 699 ‘5’ of ‘E530’ represents the sorter, and is omitted in S-ERR notation. ‘E500’ cannot be indicated. 11-168 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 700 Door open jam (copy paper being fed) Door open jam (during stapling) Bin outside sensor jam Table 11-704 11-169 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 701 Remove all sheets from the bins. Staple absent Set a new cartridge. Table 11-706 11-170 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 702 Operation mode error Stops Turns on and off the original sensor (S1). Table 11-707 11-171 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 703 S16 with a discrepancy of 15 mm or more in skew timing. Table 11-708 11-172 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 704 If E402, E43, E406, and E408 are detected in sequence, an error will not be identified, as each has merely been detected no more than once. Table 11-709 11-173 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 705 The count returns to ‘0’ when the power is turned off and then on again. Table 11-710 11-174 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 706 90:Norwegian Version number 30:French A0:Portuguese Language* 40:German B0:Spanish Model (for Canon: 01) 50:Danish C0:Swedish 11-175 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 707 Row number (00 to 19; in hexadecimal) Column number (00 to 15; in hexadecimal) 11-176 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 708 0 circuit 1 Original detection circuit 2 Original detection circuit 3 11-177 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 709 WIDE : paper width sensor output (analog) : paper length sensor output (0/1) SIZE : paper width (mm) 11-178 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 710: I/O Display Mode ( 2 )

    Convert the bit data into hexadecimal data when making in terms of analog data (for example, address P023 photosensitive drum potential signal). 11-179 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 711 P000-15 Right deck pick-up roller SL04 RDPURR J116A-10 1: ON releasing solenoid drive signal 11-180 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 712 P001-14 Wire cleaning motor HP — signal P001-15 Size detection drive J110B-4/ -7/-10 11-181 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 713 Original size 3 B detection DSZ3B J110B-11 0: original signal present P002-15 Not used 11-182 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 714 J102B-5 0: ON signal P003-15 Fixing sub heater drive SHRD J102B-3 0: ON signal 11-183 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 715 P004-14 Internal signal (tray X shift start) Internal signal (tray Y shift P004-15 start) 11-184 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 716 Control card detection signal CCNNT J106B-2 1: card present P005-15 Internal signal (encoder error detection) 1: error 11-185 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 717 P006-15 Holding tray reversing clutch CL04 HTRVCD J113A-6 1: ON drive signal 11-186 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 718 P007-15 Left deck lifter position PS34 LDLTP J121A-7 1: pick-up sensor signal position 11-187 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 719 Internal signal (total copy counter open circuit detection) P008-15 Internal signal (accessory counter open circuit detection) 11-188 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 720 P010-04 Not used P010-05 Not used P010-06 Not used P010-07 Not used 11-189 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 721 Internal signal (key return) J125-10 P017-06 Internal signal (key return) J125-11 P017-07 Internal signal (key return) J125-12 11-190 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 722 J117B-10 signal P025 Cassette 4 paper width SVR3 C4PW J117A-12 signal P026 Not used 11-191 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 723 Not used P029-04 Not used P029-05 Not used P029-06 Not used P029-07 Not used 11-192 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 724 1: ON speed control signal P032-07 Pick-up motor (M1) CCW 1: CCW rotation rotation signal 11-193 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 725 MFST 1: paper detection signal (S32) P038-07 Sub try detection signal 1: closed (S28) 11-194 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 726 Matrix common 1 signal P041-06 Matrix common 2 signal P041-07 Matrix common 3 signal 11-195 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 727 Original sensor (S1) DA signal P054 Registration sensor (S3) DA signal P055 Skew sensor (S4) DA signal 11-196 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 728 Original sensor 2 (S27) DA signal P059 Not used P060 Original detection VA Hexadecimal resistance (VR1) (4 digits) 11-197 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 729 1 (M5) P063-07 Multi guide drive motor MGMB 1: ON control signal 1 (M5) 11-198 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 730 1: ON rotation signal P065-07 Stapler motor (M2) CW SPMCW 1: ON rotation signal 11-199 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 731 Matrix SEG output signal 0 P071-06 Matrix SEG output signal 1 P071-07 Matrix SEG output signal 2 11-200 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 732 Not used P074-04 Not used P074-05 Not used P074-06 Not used P074-07 Not used 11-201 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 733 JNTS 1: connected to copier P076-05 Not used P076-06 Not used P076-07 Not used 11-202 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 734 DROPN 1: door closed signal P079-05 Not used P079-06 Not used P079-07 Not used 11-203 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 735 Swing motor current (M4) D/A output P090-00~07 Staple unit shift motor current (M3) D/A output 11-204 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 736 Push bar drive motor current (M7) P095-00~07 Bin paper sensor 2 light adjustment (S7) D/A output 11-205 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 737 Guide bar HP sensor 0: connector off connector detection P064-06 Not used P064-07 Not used 11-206 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 738 1: ON solenoid drive signal P067-07 Bin shift motor UP signal BMUP 0: UP 11-207 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 739 Non sort sensor 1: paper present P070-06 Not used P070-07 Not used Hereafter Not used 11-208 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 740 Holding tray Y motor (phase M08B J113A-11 B) signal P098-07 Holding tray X motor hold M09HLD J113B-3 signal 11-209 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 741 Not used P101-04 Not used P101-05 Not used P101-06 Not used P101-07 Not used 11-210 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 742 Not used P105-04 Not used P105-05 Not used P105-06 Not used P105-07 Not used 11-211 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 743 Digit 2 input P120-05 Digit 2 input P120-06 Digit 2 input P120-07 Digit 2 input 11-212 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 744 0: open P123-07 Deck lifter position detection Q110 DLPD J2001A-4 1: pick-up signal position 11-213 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 745 P124-06 Deck open solenoid drive SL102 DOPSD J2001B-6 0: ON signal P124-07 Not used 11-214 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 746: Adjustment Mode

    Use it to adjust the degree of optimum 53~139 A higher setting exposure. decreases the copy density. 11-215 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 747 (decreasing the leading edge margin). Unit: 0.1 mm 11-216 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 748 A higher setting image width (blank exposure activation decreases the trailing period). edge non-image width. 11-217 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 749 DC controller PCB.) 11-218 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 750 DC controller PCB.) 11-219 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 751 DC controller PCB.) 11-220 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 752 Use it to fine adjust or enter the paper 000~255 100V model only. width basic value (A4R) for the cassette 11-221 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 753 Use it to fine-adjust or enter the paper 000~255 width basic value (A4R) for the cassette 11-222 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 754 Use it to fine-adjust or enter the paper 000~255 width basic value (A4) for the multifeeder. 11-223 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 755 2: 0.70 to 0.65 atm (up to altitude of from 3000 to 3500 m) 11-224 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 756 RDF corresponds to a change in the settings in service mode. 11-225 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 757 A higher setting makes original intensity (right pick-up in AE 1023 the slope steep. mode). 11-226 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 758 (*) on the copier's control panel. 11-227 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 759 Unit:0.1 mm 11-228 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 760 11-229 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 761 11-230 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 762 11-231 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 763 11-232 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 764: Function Mode

    * key. If the developing assembly has been installed, press the OK key on the touch panel, and then press the * key. 11-233 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 765 RDF jam, or alarm history. However, initializing E000 or the like will not initialize the jam history. 11-234 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 766 Additonal Functions (User Mode) key, Guide key and pilot lamp will turn on and off in sequence. 11-235 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 767 Use it to turn on the developing cylinder. The cylinder operates for about 2 min. 11-236 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 768 If ‘0’ is indicated, set an F5 original. If ‘1’ is indicated, set an F9 original. 11-237 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 769 PO-CONT Use it to turn on and off potential control. 1: OFF 0: ON 11-238 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 770 Thereafter, select the item on the screen to execute. 11-239 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 771 Thereafter, select the item on the screen to execute. 11-240 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 772 (reference) A4/A3 STMT-R STMT-R (139.7mm) (210mm) (297mm) Paper width Figure 11-701 11-241 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 773 LEDs 1, 2, and 3 on the RDF controller PCB (flashing in sequence or simultaneously). 11-242 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 774 Use it to initialize the RAM on the DC controller After initialization, the PCB. screen changes to the Copying Standard screen. 11-243 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 775: Options Mode

    1: coin card. 2: copy card 11-244 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 776 1–6 of mode memory: used as regular mode memory functions. 11-245 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 777 Description Remarks M-NOTATI Use it to change the paper size choices for the multifeeder. 11-246 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 778 AB and Inch originals (detec- 1: enable tion for a AB/Inch mix; e.g., A4 and LTR originals). 11-247 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 779 (U-NOTGARI) is set to ‘1’. 0: LTR (indicated as LTR) 1: A LTR (indicated as LTR) 11-248 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 780 1: normal control –5°C 2: normal control –10°C 3: normal control –15°C 4: normal control –20°C 11-249 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 781 Add Fixing Cleaning 1: always Belt and Waste Toner Full). 11-250 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 782 Enter an approximate humidity of the site (between Factory default : 35 30% and 99%). 11-251 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 783 10 min, 1: OFF and after 60 min. 11-252 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 784: Counter Mode

    Large size copy counter for cassette 4 (300 mm After '99999999', long or more; or, non-default size) returns to '00000000'. 11-253 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 785 Large size original feed counter (300 mm long or After '99999999', more; or, non-default size) returns to '00000000'. 11-254 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 786 Copy counter for paper deck-A1 (less than 300 mm After '99999999', long) returns to '00000000'. 11-255 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 787 Small size original feed counter (less than 300 mm After '99999999', long) returns to '00000000'. 11-256 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 788 *Like the RDF’s separation pad, some parts need replacement based on the number of copies made according to pick-up direction (left or right). 11-257 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 789 • when the original is pulled in and its size is identified 11-258 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 790: Self Diagnosis

    • The fixing feeding assembly E006 rear) became disconnected during • DC controller PCB (fault) copying. 11-259 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 791 X home position signal (HTXHP) is generated for 2 sec or more. 11-260 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 792 • The lens Y home position signal (LYHP) is generated for 2 sec or more. 11-261 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 793 • Connector (poor connection) the sorter controller PCB goes out • 24V power supply of order. 11-262 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 794 2. For E015, E202, and E204, you can make checks in reference to B-ERR1, B- ERR2, and B-ERR3 in service mode ( 11-263 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 795 • Image leading edge sensor 1 (S20; fault) • Original sensor 1 (S1; fault) • Original sensor 2 (S27; fault) 11-264 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 796 RDF, and set the original on the copyboard glass to continue to make copies. 11-265 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 797: C. Sorter

    • The input signal from the swing home position sensor (PI9) does not change for 1 sec or more. 11-266 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 798 (with the sorter connected). **You need not detach the sorter from the copier. 11-267 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 799 CHAPTER 11 TROUBLESHOOTING 11-268 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 800: General Timing Chart

    B. SIGNALS AND ABBREVIATIONS ...A-2 DIAGRAM........A-7 C. GENERAL CIRCUIT DIAGRAM..A-5 E. SPECIAL TOOLS LIST ....A-9 F. SOLVENTS AND OILS....A-10 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 801 Cleaner fan (FM7) 10 min 10 min Scanner cooling fan (FM8) Total copy counter (CNT1) COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 802 Stapler swing motor (M4) Staple swing stop position sensor (MSW2) Stapler motor (M2) Paper retaining solenoid (SL3) Bin shift motor (M9) DOWN Centering DOWMN COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
  • Page 803 SCANNER MOTOR BRAKE command FM3D EXHAUST FAN DRIVE command (HALF SPEED) M3F/R SCANNER MOTOR FORWARD command COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 804 RIGHT DECK LIFTER LIMIT signal RDEOP RIGHT DECK OPEN DETECT signal RDFEDGE RDF DOCUMENT LEADING EDGE signal RDLMD RIGHT DECK LIFTER MOTOR DRIVE command COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)

  • Page 805: Circuit Diagram

    C. GENERAL CIRCUIT DIAGRAM not available COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 806 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 807 D. PAPER DECK-A1 GENERAL CIRCUIT DIAGRAM not available COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 808 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 809 FY9-3014 Use to check the Environment environment sensor sensor. checking tool COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...

  • Page 810: Solvents And Oils

    Lubricant oil Lubricating: Slicone oil • CK-0562 (20 g) plastic drive and friction parts A-10 COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 811 Prepared by OFFICE IMAGING PRODUCTS TECHNICAL SUPPORT DEPARTMENT 1 OFFICE IMAGING PRODUCTS TECHNICAL SUPPORT DIVISION CANON INC. Printed in Japan REVISION 0 (JULY 1997) [18723] 5-1, Hakusan 7-chome, Toride-shi, Ibaraki 302 Japan Download service manual and resetter printer at http://printer1.blogspot.com...
  • Page 812 This publication is printed on 70% reprocessed paper. PRINTED IN JAPAN (IMPRIMÉ AU JAPON) 0797S2.11-1 Download service manual and resetter printer at http://printer1.blogspot.com...

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