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Sony SLV-ED8ME Service Manual
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Sony SLV-ED8ME Service Manual

Sony SLV-ED8ME Service Manual

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SERVICE MANUAL
• Refer to the SERVICE MANUAL of VHS MECHANICAL
ADJUSTMENTS VI for MECHANICAL ADJUSTMENTS.
(9-921-647-11)
* The abbreviations of ED8, EZ8 and EZ9 contained in this service manual are
indicated when these models are common to all their corresponding models
as given below.
Abbreviated
ED8
model name
ED8ME
All model
ED8ML
names
SLV-
System
Color system
ED8:
PAL, MESECAM, NTSC 3.58,
NTSC 4.43
EZ8/EZ9:
PAL, NTSC 4.43
TV system
ED8:
B/G, D/K, I
EZ8/EZ9
B/G
Channel coverage
ED8:
B/G: VHF E2 to E12/UHF E21 to E69/
CATV S01 to S05, S1 to S41
D/K: VHF R1 to R12, UHF R21 to R69
I: VHF SA4 to SA13/UHF B21 to B69/
CATV S01 to S05, S1 to S41
M: VHF A2 to A13/UHF A14 to A69/
CATV A-8 to A1, A to W, W+1 to W+84
EZ8AS/EZ9AS:
VHF AS0 to AS12, AS5A, AS9A
UHF AS28 to AS69
CATV S01 to S05, S1 to S41
MICROFILM
Photo: SLV-ED8ML
EZ8
EZ9
EZ8AS
EZ9AS
EZ8NZ
SPECIFICATIONS
EZ8NZ:
VHF NZ1 to NZ11
UHF E21 to E69
CATV S01 to S05, S1 to S41
Stereo system
ED8/EZ8NZ:
NICAM STEREO: B/G, I
ZWEITON German stereo: B/G
ED8AS/EZ9AS:
ZWEITON German stereo: B/G
RF output signal
ED8/EZ8NZ:
UHF channels 21 to 69
EZ8AS/EZ9AS:
UHF channels 28 to 69
Aerial out
75-ohm asymmetrical aerial socket
SLV-ED8ME/ED8ML/EZ8AS/
NewZealand Model
Inputs and outputs
LINE-1, 2-IN
VIDEO IN, phono jack (1)
Input signal: 1 Vp-p, 75 ohms, unbalanced,
sync negative
AUDIO IN, phono jack (2)
Input level: 327 mVrms
Input impedance: more than 47 kilohms
LINE-3 IN (SAT IN) (ED8, EZ9)
VIDEO IN, phono jack (1)
Input signal: 1Vp-p, 75 ohms, unbalanced,
sync negative
AUDIO IN, phono jack (2)
Input level: 327mVrms
Input impedance: more than 47 kilohms
VIDEO CASSETTE RECORDER
EZ8NZ/EZ9AS
RMT-V243/V245
Australian Model
SLV-EZ8AS/EZ9AS
E Model
SLV-ED8ML
ME Model
SLV-ED8ME
SLV-EZ8NZ
S MECHANISM
G
– Continued on next page –

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  • Page 1 SLV-ED8ME/ED8ML/EZ8AS/ EZ8NZ/EZ9AS RMT-V243/V245 SERVICE MANUAL Australian Model SLV-EZ8AS/EZ9AS E Model SLV-ED8ML ME Model SLV-ED8ME NewZealand Model SLV-EZ8NZ S MECHANISM Photo: SLV-ED8ML • Refer to the SERVICE MANUAL of VHS MECHANICAL ADJUSTMENTS VI for MECHANICAL ADJUSTMENTS. (9-921-647-11) * The abbreviations of ED8, EZ8 and EZ9 contained in this service manual are indicated when these models are common to all their corresponding models as given below.

  • Page 2: Feature Difference

    LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB- LISHED BY SONY.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS Section Title Page Section Title Page Feature Difference ..............2 INTERFACE, IC PIN FUNCTION DESCRIPTION SERVICE NOTE ..............4 5-1. System Control-Video Block Interface (MA-325 board IC161) ..........5-1 GENERAL 5-2. System Control-Servo Peripheral Circuit Interface (MA-325 board IC161) ..........5-1 Getting Started ..............

  • Page 4: Service Note

    SERVICE NOTE 1. DISASSEMBLY • This set can be disassembled in the order shown below. Note: Pages in indicated pages in the SERVICE MANUAL. Pages in indicated pages in the VHS MECHANICAL ADJUSTMENT MANUAL VI. Upper case (Page 2-1) Front Panel NK-11 Board Pinch Press Power...
  • Page 5 SLV-ED8/EZ8/EZ9 SECTION 1 This section is extracted from SLV- GENERAL ED8ME/ML instruction manual.
  • Page 14 1-10...
  • Page 15 1-11...
  • Page 16 1-12...
  • Page 17 1-13...
  • Page 18 1-14...
  • Page 19 1-15...
  • Page 20 1-16...
  • Page 21 1-17 (E) 1-17...

  • Page 22: Upper Case Removal

    SLV-ED8/EZ8/EZ9 SECTION 2 DISASSEMBLY Note: Follow the disassembly procedure in the numerical order given. 2-1. UPPER CASE REMOVAL 2-3. REAR PANEL REMOVAL 3 Upper case 8 Rear panel 1 Two tapping screws 1 Two connectors (CN101, 901) 3 Harness 7 Claw 4 Three claws 6 Claw 2 Connector...

  • Page 23: Board Removal (Ez9)

    2-5. FR-137, DM-77, SW-307, IO-64 BOARD 2-7. FR-137, DM-77, IO-64 BOARD REMOVAL (EZ9) REMOVAL (ED8/EZ8) !¡ SW-307 board 3 FR-137 board 4 FR-137 board 7 Four screws 7 Screw 0 Two screws (B2.6 × 8) 3 Four screws (B2.6 × 8) (B2.6 ×...

  • Page 24: Power Block Removal

    2-9. POWER BLOCK REMOVAL 1 Power cord 2 Two screws (B3) 3 Power block 2-10. PS-414, MA-325 BOARD REMOVAL 5 Three screws (B3) 6 MA-325 board 2 Three screws 4 Screw (B3) (B3) 1 Connector (CN162) 3 PS-414 board...

  • Page 25: Internal Views

    2-11. INTERNAL VIEWS Drum assembly (M901) (DZH-95A/Z-RP) 8-839-045-02 FE head Q101 1-500-144-11 Tape top sensor 8-729-043-84 Q100 Tape end sensor 8-729-043-84 D102 Tape top/end LED 8-719-048-26 Drum assembly (M901) (DZH-95A/Z-RP) M902 8-839-045-02 Capstan motor 1-698-971-11 M903 Cam motor assembly X-3947-577-1...

  • Page 26: Circuit Boards Location

    2-12. CIRCUIT BOARDS LOCATION MA-325 RJ-79 VIDEO, AUDIO, I/O, (ADDITIONAL REAR IN/OUT) SERVO/SYSTEM CONTROL, TUNER NK-11 (ED8, EZ8NZ) POWER BLOCK (NICAM) (SR-718) (SWITCHING REGULATOR) SW-307 (EZ9) (POWER SWITCH) IO-64 PS414 (FRONT IN) (POWER SUPPLY) FR-137 FL DRIVE, MODE CONTROL DM-77 (MODE CONTROL) 2-5 E...

  • Page 27: Block Diagrams

    SLV-ED8/EZ8/EZ9 SECTION 3 BLOCK DIAGRAM 3-1. OVERALL BLOCK DIAGRAM EZ8NZ LINE-1 OUT RJ-79 BOARD (3/3) MA-325 BOARD CNJ901 (SEE PAGE 4-31) (SEE PAGE 4-5~4-27) VIDEO VIDEO SAT DEC CNJ954 HEAD IC501 M901 AUDIO L IC201 (2/2) IC401 DEC IN IC161 DRUM MOTOR SP CH1 REC RF, PB RF, CROT...

  • Page 28: Video1 Block Diagram

    SLV-ED8/EZ8/EZ9 3-2. VIDEO1 BLOCK DIAGRAM IC501@™ PB MA-325 BOARD (1/5) (SEE PAGE 4-11) 640mVp-p (H) IC501 IC501 @• REC IC501 @¡ REC/PB VIDEO REC/PB AMP VIDEO CN502 HEAD SP CH1 F SP CH1 S 88mVp-p (H) 4.6Vp-p (2V) Q501 SP CH2 F PB RF PB RF BUFF...

  • Page 29: Video2 Block Diagram

    SLV-ED8/EZ8/EZ9 3-3. VIDEO2 BLOCK DIAGRAM IC201 $™ REC/PB IC201 $• REC/PB IC202 7 REC/PB IC202!£ REC/PB REC:330mVp-p(H) REC:320mVp-p(H) REC:320mVp-p(H) REC:360mVp-p (H) PB:400mVp-p(H) PB:270mVp-p(H) PB:360mVp-p(H) PB:270mVp-p(H) MA-325 BOARD (2/5) IC201 (1/2) (SEE PAGE 4-11) Y/C PROCESS IC202 CCD DELAY IC201 !∞ PB Q208 BUFFER MAIN...

  • Page 30: Servo/System Control Block Diagram

    SLV-ED8/EZ8/EZ9 3-4. SERVO/SYSTEM CONTROL BLOCK DIAGRAM MA-325 BOARD (3/5) (SEE PAGE 4-15,4-17) IC161 MTR 12V SERVO/SYSTEM CN101 CONTROL MTR 12V IC101 (1/2) OUTPUT DRUM ERROR DRIVER INTEGRATOR CN105 DRUM VS DRUM DA SI 0 IC161 ^•REC/PB OUTPUT DRIVER ASURA CS ASURA CS MODE ASURA RESET...

  • Page 31: Audio Block Diagram

    SLV-ED8/EZ8/EZ9 3-5. AUDIO BLOCK DIAGRAM MA-325 BOARD (4/5) (SEE PAGE 4-11,4-21) CN301 IC071 MONO IC201 (2/2) AUDIO HEAD HEAD SW NORMAL AUDIO PROCESS A-H SW REC: EP, LP T081, Q081 AUDIO BIAS ERASE ERASE HEAD Q301 AUTO BIAS T091, Q091 CN302 Q092 FULL...

  • Page 32: Tuner Block Diagram

    SLV-ED8/EZ8/EZ9 3-6. TUNER BLOCK DIAGRAM MA-325 BOARD (5/5) (SEE PAGE 4-27) EZ8/EZ9 TU701 TU702 AERIAL AERIAL EZ8AS/EZ9 5 10 11 12 15 21 20 6 22 2 18 3 14 15 16 23 22 6 24 7 20 IC750 MPX PROCESSOR L OUT R OUT CN105...

  • Page 33: Mode Control Block Diagram

    SLV-ED8/EZ8/EZ9 3-7. MODE CONTROL BLOCK DIAGRAM SW-307 BOARD RF-137 BOARD (SEE PAGE 4-39) (SEE PAGE 4-39) IC301 IC400 TIMER/TUNER/MODE REMOTE COMMANDER CONTROL RECEIVER CN400 CN308 SIRCS SIRCS IN ED8/EZ8 IC304 REMOTE COMMANDER RECEIVER CN303 D400 Q400 SO 0 POWER CONT POWER CONT SCK 0 SCLK...

  • Page 34: Power Block Diagram

    SLV-ED8/EZ8/EZ9 3-8. POWER BLOCK DIAGRAM ED8/EZ8NZ NK-11 BOARD (SEE PAGE 4-33) NICAM PROCESSOR MA-325 BOARD TU701 : ED8 (SEE PAGE 4-5~4-27) TU702 : EZ8/EZ9 TUNER CN751 PS-414 BOARD IC750 T101 (SEE PAGE 4-43) CN162 CN201 CN600 CN601 D201 PROCESSOR UN30V +35V Q701 L101, 102...

  • Page 35: Frame Schematic Diagram

    SLV-ED8/EZ8/EZ9 4-1. FRAME SCHEMATIC DIAGRAM FRAME...

  • Page 36: Printed Wiring Boards And Schematic Diagrams

    SLV-ED8/EZ8/EZ9 4-2. PRINTED WIRING BOARD AND SCHEMATIC DIAGRAMS MA-325 (HEAD AMP) SCHEMATIC DIAGRAM • See page 4-9 to 4-10 for printed wiring board. – Ref. No.: MA-325 board; 2,000 series – • Waveforms 1 IC501 4 REC 2 IC501 @• REC 3 IC501 @™...

  • Page 37: Printed Wiring Board

    SLV-ED8/EZ8/EZ9 MA-325 (VIDEO, AUDIO, I/O, SERVO/SYSTEM CONTROL, TUNER) PRINTED WIRING BOARD There are few cases that the part isn't mounted in this model is printed on this diagram. – Ref. No.: MA-325 board; 2,000 series – NTSC PB LINE-1 IN/OUT AUDIO ON PAL NTSC...

  • Page 38: Video, Audio) Schematic Diagram

    SLV-ED8/EZ8/EZ9 MA-325 (VIDEO, AUDIO) SCHEMATIC DIAGRAM • See page 4-9 to 4-10 for printed wiring board. – Ref. No.: MA-325 board; 2,000 series – VIDEO, AUDIO MA-325 (2/9) 4-11 4-12...
  • Page 39 • Waveforms 1 IC201 !¢ REC 6 IC201 #• REC/PB !¡ IC201 ^º REC/PB 340 mVp-p (H) 2.0 Vp-p (H) 512 mVp-p (4.43 MHz) (PAL) 2 IC201 !∞ PB 7 IC201 $™ REC/PB !™ IC202 !£ REC/PB 576 mVp-p (H) REC : 330 mVp-p (H) REC : 360 mVp-p (H) PB : 400 mVp-p (H)
  • Page 40 • Waveforms 1 IC161 ^• REC/PB 4 IC161 1 REC/PB 5.3 Vp-p (2 V) 5.1 Vp-p (2 V) 2 IC161 ^ª REC/PB 5 IC161 7 REC 5.0 Vp-p (300 Hz) 5.0 Vp-p (2 V) 3 IC161 &º REC/PB 6 IC161 $£ REC/PB 5.1 Vp-p (757.6 Hz) 2.4 Vp-p (16 MHz) 4-14...

  • Page 41: System Control) Schematic Diagram

    SLV-ED8/EZ8/EZ9 MA-325 (SYSTEM CONTROL) SCHEMATIC DIAGRAM • See page 4-9 to 4-10 for printed wiring board. – Ref. No.: MA-325 board; 2,000 series – SYSTEM CONTROL MA-325 (3/9) 4-15 4-16...

  • Page 42: Servo Control) Schematic Diagram

    SLV-ED8/EZ8/EZ9 MA-325 (SERVO CONTROL) SCHEMATIC DIAGRAM • See page 4-9 to 4-10 for printed wiring board. – Ref. No.: MA-325 board; 2,000 series – SERVO CONTROL MA-325 (4/9) 4-17 4-18...

  • Page 43: Bias, Ctl) Schematic Diagram

    SLV-ED8/EZ8/EZ9 MA-325 (BIAS, CTL) SCHEMATIC DIAGRAM • See page 4-9 to 4-10 for printed wiring board. – Ref. No.: MA-325 board; 2,000 series – BIAS, CTL MA-325 (5/9) 4-19 4-20...

  • Page 44: Hi-Fi Audio) Schematic Diagram

    SLV-ED8/EZ8/EZ9 MA-325 (Hi-Fi, AUDIO) SCHEMATIC DIAGRAM • See page 4-9 to 4-10 for printed wiring board. – Ref. No.: MA-325 board; 2,000 series – Hi-Fi, AUDIO MA-325 (6/9) 4-21 4-22...

  • Page 45: Osd) Schematic Diagram

    SLV-ED8/EZ8/EZ9 MA-325 (OSD) SCHEMATIC DIAGRAM • See page 4-9 to 4-10 for printed wiring board. – Ref. No.: MA-325 board; 2,000 series – • Waveforms 2 IC401 @º REC/PB 3 IC401 !§!• REC/PB 4 IC401 7 REC/PB 5 IC401 5 REC/PB 6 IC401 2 REC/PB 1 IC401 @•...

  • Page 46: Io) Schematic Diagram

    SLV-ED8/EZ8/EZ9 MA-325 (I/O) SCHEMATIC DIAGRAM • See page 4-9 to 4-10 for printed wiring board. – Ref. No.: MA-325 board; 2,000 series – MA-325 (8/9) 4-25 4-26...

  • Page 47: Tuner) Schematic Diagram

    SLV-ED8/EZ8/EZ9 MA-325 (TUNER) SCHEMATIC DIAGRAM • See page 4-9 to 4-10 for printed wiring board. – Ref. No.: MA-325 board; 2,000 series – DE-EMPHASIS PAL&NTSC TUNER MA-325 (9/9) 4-27 4-28...

  • Page 48: Printed Wiring Board And Schematic Diagram

    SLV-ED8/EZ8/EZ9 IO-64 (FRONT IN) PRINTED WIRING BOARD AND SCHEMATIC DIAGRAM – Ref. No.: IO-64 board; 1,000 series – There are few cases that the part isn't mounted in this model is printed on this diagram. IO-64 BOARD LINE-2 IN VIDEO AUDIO JS492 (12)
  • Page 49 SLV-ED8/EZ8/EZ9 RJ-79 (ADDITIONAL REAR IN/OUT) PRINTED WIRING BOARD AND SCHEMATIC DIAGRAM – Ref. No.: RJ-79 board; 1,000 series – There are few cases that the part isn't mounted in this model is printed on this diagram. MA-325 RJ-79 VIDEO, AUDIO, I/O, (ADDITIONAL REAR IN/OUT) SERVO/SYSTEM CONTROL, TUNER CNJ952:ED8/EZ9...
  • Page 50 SLV-ED8/EZ8/EZ9 NK-11 (NICAM) PRINTED WIRING BOARD AND SCHEMATIC DIAGRAM – Ref. No.: NK-11 board; 1,000 series – There are few cases that the part isn't mounted in this model is printed on this diagram. NK-11 NK-11 BOARD(SIDE B) BOARD(SIDE A) 1-669-815- 1-669-815- (11)
  • Page 51 SLV-ED8/EZ8/EZ9 DM-77 (MODE CONTROL) PRINTED WIRING BOARD AND SCHEMATIC DIAGRAM – Ref. No.: DM-77 board; 1,000 series – There are few cases that the part isn't mounted in this model is printed on this diagram. BOARD PAUSE (12) 1-670-921- MODE CONTROL DM-77 4-35 4-36...
  • Page 52 SLV-ED8/EZ8/EZ9 FR-137 (FL DRIVE, MODE CONTROL), SW-307 (POWER SWITCH) PRINTED WIRING BOARDS – Ref. No.: FR-137 board, SW-307 board; 1,000 series – There are few cases that the part isn't mounted in this model is printed on this diagram. FR-137 BOARD ONE TOUCH TUNING...
  • Page 53 SLV-ED8/EZ8/EZ9 FR-137 (FL DRIVE, MODE CONTROL), SW-307 (POWER SWITCH) SCHEMATIC DIAGRAM – Ref. No.: FR-137 board, SW-307 board; 1,000 series – • Waveforms 2 IC301 #™ REC/PB 1 IC301 &¢ REC/PB 2.3 Vp-p (32.77 kHz) 2.0 Vp-p (16 MHz) MODE CONTROL FR-137, SW-307 4-39 4-40...
  • Page 54 SLV-ED8/EZ8/EZ9 PS-414 (POWER SUPPLY) PRINTED WIRING BOARD – Ref. No.: PS-414 board; 1,000 series – There are few cases that the part isn't mounted in this model is printed on this diagram. PS-414 BOARD (11) 1-670-925- PS-414 BOARD MA-325 RJ-79 VIDEO, AUDIO, I/O, CN600 (ADDITIONAL REAR IN/OUT)
  • Page 55 SLV-ED8/EZ8/EZ9 PS-414 (POWER SUPPLY) SCHEMATIC DIAGRAM – Ref. No.: PS-414 board; 1,000 series – Note: The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified. POWER SUPPLY PS-414 4-43 4-44...
  • Page 56 SLV-ED8/EZ8/EZ9 SR-718 (SWITCHING REGULATOR) PRINTED WIRING BOARD – Ref. No.: SR-718 board; 4,000 series – There are few cases that the part isn't mounted in this model is printed on this diagram. SR-718 BOARD CN101 CN201 D101 D102 D103 D104 D105 D107 D108...
  • Page 57 SLV-ED8/EZ8/EZ9 SR-718 (SWITCHING REGULATOR) SCHEMATIC DIAGRAM – Ref. No.: SR-718 board; 4,000 series – SR-708/718 BOARD R201 D201 T101 EG01C 1/2W R102 C110 R209 C201 0.01µF 47µF 400V IC101 SWITCH L202 D202 10µH RL4Z IC101 MIP184 D105 EG01C CN201 9P C203 C202 R210...

  • Page 58: System Control-Video Block Interface (Ma-325 Board Ic161)

    5-1. SYSTEM CONTROL – VIDEO BLOCK INTERFACE (MA-325 BOARD IC161) STOP/ TAPE TAPE PB • REC • × 2 Signal Pin No. THREAD- UNTHREAD- SLOW REVIEW PAUSE PAUSE RF SWP MA-325 (SW30) IC1611 MA-325 IC1614 MA-325 V SYNC IC161^§ MA-325 NT JUDGE IC161!£...
  • Page 59 5-3. SYSTEM CONTROL – MECHANISM BLOCK INTERFACE (MA-325 BOARD IC161) TAPE TAPE CASSETTE CASSETTE PB • REC • × 2 Signal Pin No. EJECTED THREAD- UNTHREAD- STOP SLOW REVIEW LOADING UNLOADING PAUSE PAUSE MA-325 Hi-Z IC1619 MA-325 MODE 1 IC161@™ MA-325 MODE 2 IC161@¡...

  • Page 60: System Control-System Control Peripheral Circuit Interface (Ma-325 Board Ic161)

    5-4. SYSTEM CONTROL – SYSTEM CONTROL PERIPHERAL CIRCUIT INTERFACE (MA-325 BOARD IC161) Signal Pin No. I/O Level MA-325 ASURA RESET Normally “H”, “L” when service interruption is detected or restored IC161$º MA-325 ASURA CS Chip select signal from timer microprocessor. V period “L” pulse IC161$¢...

  • Page 61: Servo/System Control Microprocessor Pin Function (Ma-325 Board Ic161)

    5-6. SERVO/SYSTEM CONTROL MICROPROCESSOR PIN FUNCTION (MA-325 BOARD IC161) Pin No. Pin Name Function Pin No. Pin Name Function RF SWP RF switching pulse output – Not used AF REC P “L” output when hi-fi audio REC pause AVSS – UNSW Ground –...

  • Page 62: Timer/Tuner Control Microprocessor Pin Function (Fr-137 Board Ic301)

    5-7. TIMER/TUNER CONTROL MICROPROCESSOR PIN FUNCTION (FR-137 BOARD IC301) Pin No. Pin Name Function Pin No. Pin Name Function – Not used (UNSW 5V) SEG8 Segment terminal 8 POWER FAIL Power failure detect signal input SEG9 Segment terminal 9 – Not used (UNSW 5V) SEG10 Segment terminal 10...

  • Page 63: Nicam Processor Pin Function (Nk-11 Board Ic1)

    5-8. NICAM STEREO PROCESSOR PIN FUNCTION (NK-11 BOARD IC1) Pin. No. Pin Name Function OUTL Analog output left OUTR Analog output right VDDA1 – Analog power supply; DAC circuitry VSSA1 – Analog ground; DAC circuitry VSSD1 – Digital ground; DAC circuitry VDDD1 –...

  • Page 64: Error Code

    SLV-ED8/EZ8/EZ9 SECTION 6 ERROR CODES Table 6-2. Mechanism position list This set displays an error code, and a mode code in case of error on the display tube, if the operation stopped by error. Code Position VTR status The following provides description concerned. Other than the following positions Display tube (lower 5 digits) EJECT...

  • Page 65: Adjustments

    SLV-ED8/EZ8/EZ9 SECTION 7 ADJUSTMENTS 2-1-3. Set-up of Adjustment During the adjustment, see the Parts Arrangement In this adjustment, PAL or NTSC pattern generator is connected Diagram for Adjustments on Page 7-6. with LINE input signal terminal. When check to tuner, connected AERIAL terminal.

  • Page 66: Adjusting Sequence

    2-1-6. Adjusting Sequence 2-3. SERVO SYSTEM Adjustment Make the electrical adjustment in the following sequence. 2-3-1. RF Switching Position Adjustment Checking power supply (MA-325 Board) Purpose: Adjust the interval between A ch and B ch of tape playback out- put. Servo system adjustment Improve the interchangeability with other tapes and sets.

  • Page 67: Audio System Adjustments

    2-4. AUDIO SYSTEM ADJUSTMENTS RF SWP • Adjust both Lch and Rch. [Connection] Audio Audiolevel meter or generator distortion meter 600 Ω 47 kΩ Attenuator AUDIO LINE IN Feed signal both AUDIO LINE OUT channelssimultaneously. Fig. 7-2-5. Fig. 7-2-4. 2. Frequency Responce Check 2-4-1.

  • Page 68: Overall S/N Check

    3. Overall Level Characteristic and Distortion Factor 2-4-2. Normal Audio System Adjustment Check • Make adjustment in the SP mode, unless otherwise specified. Purpose: Use a normal VHS cassette for an adjustment tape. Check the record level, play level, and distortion factor against the •...

  • Page 69: Overall S/N Check

    4. Overall Level Characteristic and Distortion Factor 2-5. VIDEO SYSTEM ADJUSTMENT 2-6. PARTS ARRANGEMENT DIAGRAM FOR ADJUSTMENTS Check Purpose: 2-5-1. VCO Oscillation Frequency Adjustment MA-325 BOARD (Side A) Check the record level, play level, and distortion factor against the (MA-325 Board) reference input.

  • Page 70: Repair Parts List

    * 14 3-977-136-41 CASE, UPPER (EZ8) X-3948-596-1 DOOR ASSY, FRONT (ED8) * 15 A-6791-626-A DM-77 BOARD, COMPLETE 3-943-995-01 EMBLEM (NO.5), SONY 1-762-844-21 SWITCH, ROTARY X-3948-597-1 LOCK ASSY, DOOR (ED8) 3-979-310-01 RING (AV), JOG (EZ8) 3-987-701-01 BUTTON, OPEN (ED8) 3-988-327-01 RING (M), JOG (ED8)

  • Page 71: Front Panel And Cabinet Assemblies (Ez9)

    A-6791-655-A SW-307 BOARD, COMPLETE 1-475-835-11 SWITCH BLOCK, CONTROL * 65 A-6791-653-A DM-77 BOARD, COMPLETE X-3948-844-1 PANEL ASSY, FRONT 1-783-850-11 CABLE, FLAT (FFD-3) 3-943-995-01 EMBLEM (NO.5), SONY * 67 A-6791-654-A FR-137 BOARD, COMPLETE 3-953-432-01 SPRING (GE), FL 1-783-849-11 CABLE, FLAT (FMF-30) 1-762-844-21 SWITCH, ROTARY 3-710-901-11 SCREW, TAPPING 4-921-277-41 SCREW (B2.6X8), TAPPING, BIND...

  • Page 72: Chassis Assembly

    8-1-3. CHASSIS ASSEMBLY ED8/EZ8NZ supplied supplied supplied supplied The components identified by mark ! or dotted line with mark ! are criti- cal for safety. Replace only with part number speci- fied. Ref. No. Part No. Description Remark Ref. No. Part No.

  • Page 73: Mechanism Chassis Assembly (1)

    8-1-4. MECHANISM CHASSIS ASSEMBLY (1) Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 3-977-509-01 WASHER, THRUST 3-977-514-01 OPENER, LID 3-977-507-01 TABLE, REEL (S) 3-977-441-01 GEAR, PINCH PRESSING 3-977-508-01 TABLE, REEL (T) 3-977-445-01 GEAR, TG8 ARM DRIVING 1-500-144-11 HEAD, FE 3-977-465-01 SPRING, EXTENSION (RVS BRAKE) 3-977-495-01 SHAFT TG2...

  • Page 74: Mechanism Chassis Assembly (2)

    8-1-5. MECHANISM CHASSIS ASSEMBLY (2) Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark X-3947-581-1 BRAKE ASSY,MAIN (T) X-3944-378-1 ROLLER ASSY, GUIDE 3-977-462-01 SPRING, EXTENTION. (MAIN BRAKE) 3-965-178-01 SPRING X-3947-573-1 ARM ASSY, PENDULUM 3-969-632-04 BASE, DRUM X-3947-580-2 BRAKE ASSY, MAIN (S) A-6750-328-E SHUTTLE (T) BLOCK ASSY 3-977-513-02 LEVER, REC.

  • Page 75: Mechanism Chassis Assembly (3)

    8-1-6. MECHANISM CHASSIS ASSEMBLY (3) M902 M903 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 3-977-437-01 RETAINER,CAM MOTOR 3-977-439-01 GEAR, CAM X-3947-584-1 ASSY, REEL DIRECT 3-977-442-01 SLIDER 3-977-443-01 WASHER, STOPPER 3-977-455-01 GEAR, LOADING(T) 3-977-438-01 WORM - WHEEL 3-977-456-03 SPRING, TORSION (LOAD T) 3-977-506-01 ARM, LIMITTER SELECTION X-3947-579-1 LEVER ASSY, LOADING (T)

  • Page 76: Electrical Parts List

    DM-77 FR-137 8-2. ELECTRICAL PARTS LIST NOTE: The components identified by • Due to standardization, replacements in the • Items marked “*” are not stocked since they mark ! or dotted line with mark parts list may be different from the parts speci- are seldom required for routine service.
  • Page 77 FR-137 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C340 1-163-809-11 CERAMIC CHIP 0.047uF R302 1-216-295-00 METAL CHIP 1/10W (ED8/EZ8) R303 1-249-417-11 CARBON 1/4W C341 1-164-004-11 CERAMIC CHIP 0.1uF R304 1-216-049-00 METAL CHIP 1/10W R305 1-216-049-00 METAL CHIP 1/10W <...
  • Page 78 IO-64 MA-325 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark A-6791-628-A IO-64 BOARD, COMPLETE C114 1-163-038-00 CERAMIC CHIP 0.1uF C131 1-128-499-11 ELECT 220uF ********************* (Ref.No. 1,000 Series) C133 1-164-232-11 CERAMIC CHIP 0.01uF < CONNECTOR > C134 1-164-232-11 CERAMIC CHIP 0.01uF C141...
  • Page 79 MA-325 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C253 1-163-251-11 CERAMIC CHIP 100PF C382 1-163-016-00 CERAMIC CHIP 0.0039uF 10% C254 1-163-251-11 CERAMIC CHIP 100PF C383 1-164-489-11 CERAMIC CHIP 0.22uF C384 1-164-505-11 CERAMIC CHIP 2.2uF C255 1-163-259-91 CERAMIC CHIP 220PF C385...
  • Page 80 MA-325 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C712 1-163-009-11 CERAMIC CHIP 0.001uF D103 8-719-200-82 DIODE 11ES2 C713 1-126-933-11 ELECT 100uF D104 8-719-200-82 DIODE 11ES2 C714 1-126-933-11 ELECT 100uF D130 8-719-200-82 DIODE 11ES2 C715 1-164-232-11 CERAMIC CHIP 0.01uF D141 8-719-911-19 DIODE 1SS119...
  • Page 81 MA-325 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark JR202 1-216-296-00 METAL CHIP 1/8W L071 1-414-940-21 INDUCTOR 100uH JR203 1-216-296-00 METAL CHIP 1/8W L081 1-414-940-21 INDUCTOR 100uH JR204 1-216-296-00 METAL CHIP 1/8W L091 1-410-687-11 INDUCTOR 1.2mH L160 1-414-934-21 INDUCTOR 10uH...
  • Page 82 MA-325 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark Q751 8-729-424-67 TRANSISTOR UN2216 R162 1-216-073-00 METAL CHIP 1/10W Q752 8-729-424-67 TRANSISTOR UN2216 R163 1-216-073-00 METAL CHIP 1/10W Q753 8-729-010-05 TRANSISTOR MSB709-RT1 R164 1-216-073-00 METAL CHIP 1/10W Q755 8-729-010-05 TRANSISTOR MSB709-RT1 (EZ8/EZ9) R165...
  • Page 83 MA-325 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R300 1-216-295-00 METAL CHIP 1/10W R504 1-216-295-00 METAL CHIP 1/10W R301 1-216-093-00 METAL CHIP 1/10W R505 1-216-295-00 METAL CHIP 1/10W R302 1-216-067-00 METAL CHIP 5.6K 1/10W R506 1-216-295-00 METAL CHIP 1/10W R306...
  • Page 84 MA-325 NK-11 POWER BLOCK Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < TRANSFORMER > < COIL > T081 1-431-100-11 TRANSFORMER, BIAS OSCILLATION L006 1-412-945-11 INDUCTOR 3.3uH T091 1-423-415-11 TRANSFORMER, BIAS OSCILLATION < IC LINK > <...
  • Page 85 PS-414 RJ-79 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark A-6791-623-A PS-414 BOARD, COMPLETE A-6791-642-A RJ-79 BOARD, COMPLETE (EZ8AS) A-6791-645-A RJ-79 BOARD, COMPLETE (EZ8NZ) *********************** (Ref.No. 1,000 Series) A-6791-625-A RJ-79 BOARD, COMPLETE (ED8/EZ9) ********************** < CAPACITOR > (Ref.No.
  • Page 86 RJ-79 SW-307 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R966 1-216-089-00 METAL CHIP 1/10W ************** (ED8/EZ9) HARDWARE LIST R967 1-216-295-00 METAL CHIP 1/10W ************** (ED8/EZ9) 7-685-648-79 SCREW +BVTP 3X12 TYPE2 IT-3 R968 1-216-295-00 METAL CHIP 1/10W 7-682-547-04 SCREW +P 3X6 (ED8/EZ9)
  • Page 87 SLV-ED8/EZ8/EZ9 Sony Corporation 98H0515-1D Printed in Japan © 1998. 8 9-921-693-11 Home A&V Products Company Published by General Engineering Dept. – 128 – (Osaki East)

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