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DPro2070SB-BK
NEC DPro2070SB-BK CRT Display Manuals
Manuals and User Guides for NEC DPro2070SB-BK CRT Display. We have
1
NEC DPro2070SB-BK CRT Display manual available for free PDF download: Service Manual
NEC DPro2070SB-BK Service Manual (108 pages)
CRT DISPLAY NEC-MITSUBISHI ELECTRIC VISUAL SYSTEMS CORPORATION SEPTEMBER 2002
Brand:
NEC
| Category:
Monitor
| Size: 2.83 MB
Table of Contents
Table of Contents
3
1 Circuit Description
8
Power Block
8
Outline
8
Rectifying Circuit and Higher Harmonics Suppression (Active Filter) Circuit
8
Demagnetizing Circuit
9
Main Power Circuit
9
Power Management Circuit
9
Sub Power Circuit
9
Deflection Processor Block
10
Deflection Processor (IC601)
10
Horizontal Width Control Circuit
10
Pressure-Reduction Type Horizontal Deflection Power Circuit (IC5C0)
10
Sawtooth Waveform Generation, Vertical Size/Position Control, and Linearity Control Circuit
10
Vertical Deflection Circuit
10
High Voltage Block
11
Vertical Output Amplification Circuit
11
DBF (Dynamic Beam Focus) Circuit
12
Video Block
13
Control of Contrast and White Balance
13
Video Blanking
13
Video Clamp
13
Video Mixing/Amplifying
13
Video Signal Amplifier Circuit
13
Control of BIAS
14
Control of Brightness
14
Cut-Off Control Circuit
14
OSM (on Screen Manager)
14
Adjustment Item/Operating Function in Selecting SB Mode
15
Asset Circuit
15
AUTO-SIZE Function
15
Input Change Circuit
15
SB MODE (Super Bright Mode) Function
15
Sync on Green Circuit
15
Circuit (Cathode) Operation in Selecting SB Mode [Window Pattern]
16
SB Mode Setting Data and Control Method
16
CONSTANT BRIGHTNESS Function
17
CRT Compensation Block
17
Earth Magnetism Cancel Circuit
17
Rotation Circuit
17
Corner Purity Circuit
18
East-West Horizontal Magnetic Field Vertical Position Canceling Function
18
Corner Purity Circuit Operation
19
Digital Dynamic Convergence Clear (DDCC) Circuit
19
Vertical Magnetic Field Landing Cancel Circuit
19
Adjustment Method
20
Production of Compensation Current Waveform
20
Waveform, and Operation on the Picture
20
Block Diagram
21
East-West Horizontal Convergence Canceling Function
26
USB Circuit
26
HUB Controller Power Output
26
Outline
26
USB Downstream Power Supply
26
USB Power on Reset
26
Control Block
27
Auto-Tracking Process
27
Eeprom
27
Function of Control Circuit
27
Heater Voltage Control
27
On-Screen-Manager (OSM) Controller
27
Protection Circuit Operation
27
X-Ray Protector
27
Beam Current Protector
28
High Voltage Data Error Detection
28
Operating Time
28
Power-On Indicator (LED) Flickering Pattern in each Protector Operating
28
The DDC Communication
28
Microcomputer Pin Assignment
29
X-Ray Protection Circuit and Safety Protection Circuit
30
Beam Current Protection Circuit
30
IC701 Overcurrent Protection Circuit
30
IC701 Overload Protection Circuit
30
IC902 Overcurrent Protection Circuit
30
Overvoltage Protection Circuit
30
Short-Circuit Protection Circuit on Secondary Power Side
30
X-Ray Protection Circuit
30
Adjustment
31
Adjustment Mode
31
User Mode (Normal Mode)
31
Factory Mode
34
How to Cancel Factory Mode
34
How to Enter FACTORY-HV Mode
34
How to Entering to Factory Mode
34
2 Adjustment Procedure
36
Measuring Instruments
36
Preparatory Inspections
36
Names of each Monitor Part
37
Configuration of Front Control Panel
37
Configuration of Rear Input Connector (Signal Input)
37
OSM Display Matrix
38
User Mode
38
Factory Mode
39
Adjustment
42
Adjusting the High Voltage and High Voltage Protector
42
Adjustments before Aging
42
How to Select the Factory Adjustment (FACTORY) Mode
42
Selecting with Front Panel Switches
42
FOCUS Adjustment (Rough Adjustment)
43
Preadjustment before Aging
43
Shock Test
43
Adjusting the Back Raster Position
44
Adjusting the Landing (ITC/4 Corner Purity Adjustment)
44
Adjusting the Picture Inclination
44
Adjusting the Picture Size, Position and Distortion, DBF Amplitude and Phase
44
Adjusting the DBF Amplitude and Phase
45
Adjusting the Left/Right Distortion, Picture Width, Picture Position
45
RIGHT) and Vertical Linearity (All Preset)
45
(Bias-H)
46
Adjusting BTCEN (BRIGHT-CENT), BTMAX (BRIGHT-MAX) and BS1
46
Adjusting the Cut off
46
Adjusting BS2 (BIAS-M) / BS3 (BIAS-L)
47
Adjusting GN1 (GAIN-H) (Adjustment of 9300K)
48
Adjusting the RGB Drive Signal
48
Confirming CONSTANT BRIGHTNESS Function
48
Reading Beam Current Default Data
48
Setting CONSTANT BRIGHTNESS Circuit (Factory Mode)
48
Adjusting ABL
50
Adjusting the Focus
50
Adjusting the Convergence
51
Adjusting with ITC
51
Adjusting DDCP
53
Default Settings (with Factory Mode)
58
Inspections (in Normal Mode)
59
Degaussing Coil Operation
59
Electrical Performance
59
Grounding Conductivity Check
59
IPM off MODE Function Operation (Set the AC Power Input to 230V)
59
Withstand Voltage
59
Confirming the GLOBAL SYNC (CORNER-Purity) Function
60
Focus, Picture Performance
60
Misconvergence
60
Picture Distortion
61
Linearity
63
Adjustment Value List
64
Checking the Functions During Composite Sync Input
65
Confirming CONVERGENCE Compensation Function
65
Confirming EDGELOCK and SYNC GREEN
65
Confirming the Full White Luminance/Color Coordination
65
Confirming the Reset Operation
65
Confirming ROTATION Compensation Function
66
Confirming SB MODE Operation
66
Confirming the Color Tracking
66
CRT Installation Position
66
Luminance/Color Coordination Uniformity
66
Confirming AUTO-ADJUST Operation
67
Confirming USB
67
Others
67
DDC Function, Check of Asset Management
68
DDC Write Data Contents
69
Self-Diagnosis Shipment Setting
70
Default Inspection
70
Checking the Labels
70
Default Setting of OSM
70
Default Setting of Switches
70
Packaging
70
Degaussing with Handy-Demagnetizer
71
General Precautions
71
How to Hold and Use the Handy-Demagnetizer
71
Caution
71
Timing Chart
72
Adjustment Timing
73
Table of Contents
75
No Raster Generated
76
Abnormal Picture
78
Raster Brightness Failure
78
Image Color Failure or Contrast Failure
78
Sync Failure
79
Horizontal Sync Unstable
79
Vertical Sync Unstable
80
Screen Size and Screen Position Failure
81
Horizontal Size Failure
81
Horizontal Position Failure
82
Vertical Size and Position Failure
82
Linearity Failure
83
Horizontal Linearity Failure
83
Vertical Linearity Failure
84
Distortion Compensation Circuit Failure
85
BALANCE (Corner Correction) Failure
85
IN/OUT (Pincushion), ALIGN (Trapezoidal) and TOP/BOTTOM (Corner Correction) Failure
85
LEFT/RIGHT (Pincushion Balance), TILT (Parallelogram), and TOP BALANCE/BOTTOM
85
ROTATE (Raster Rotation) Failure
85
Focus Failure
86
Functional Errors
88
OSM Failure
88
Power Management Functional Operation Error
89
Plug & Play (DDC2B) Operation Error
90
Degaussing Functional Operation Error
90
Earth Magnetism Canceling Functional Operation Error
91
Key Operation Error
91
Circuit Errors
92
Power Circuit Failure
92
Horizontal Oscillation /Deflection Circuit Failure
93
Vertical Oscillation / Deflection Circuit Failure
94
HV Circuit Failure
95
Video Circuit Failure
96
Static Convergence Compensation Circuit Failure
98
Corner Purity Compensation Circuit Failure
99
MPU Operation Error
100
Self-Diagnostic Functions
101
USB Circuit Failure
102
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