Sony CPD-420GS - Training Manual

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Training Manual

Circuit Description and Troubleshooting

Course: MON-03

CPD-420GS

D98 Chassis

Computer Monitor

S

Table of Contents

Default Chapter2
- Table of Contents2
D98 Chassis Specifications5
- Power Saving Function6
- Self Diagnosis Function6
- Timing Specification for CPD-420GS7
Troubleshooting Safety8
Overall Block9
- N Board9
- A Board9
- H Board9
- D Board11
Power Supply13
- AC Input13
- AC Input Troubleshooting13
- EMI Filter13
- Degauss Circuit13
- Degauss Troubleshooting13
- Start up and "Active On" Operation15
- Regulation17
- Secondary Voltages19
- 'Active Off' and 'Suspend/Standby' Operation21
- Secondary Voltages23
Power Supply Protection Circuits25
- Ovp25
- UVP (under Voltage Protection)25
- OCP (over Current Protection)25
- Troubleshooting Protection Circuits25
- No Power Troubleshooting27
- Feedback Circuit Troubleshooting27
- The AN8037 Power Supply Controller29
- Troubleshooting Short Circuit Protection31
- Troubleshooting Secondary Circuits33
- Rectifier Section Troubleshooting33
- Troubleshooting Horizontal Centering33
- +5V Standby Circuit35
- Troubleshooting +5V Standby Circuit35
- +12V Regulator35
- Troubleshooting +12V Regulator35
- Heater Voltage Regulator37
- Troubleshooting Heater Voltage37
N Board39
- Micro Standby and Reset (N Board)39
- DSP Regulator39
Video and OSD Processing41
- RGB Preamp41
- RGB Drive43
- Rgb out43
- Rgb Cutoff45
- On Screen Display (OSD)47
- ASC (Auto Size and Center)47
- Sub Contrast (Cutoff) Control49
- Brightness and Contract Control49
- G2 Control and Spot Killer51
Color Restoration53
- Color Restoration Circuit (Red Only)53
- Color Restoration Function (Red Only)53
GPE Graphic Picture Enhancement55
- Standard Mode55
- Presentation Mode55
- Graphic/Video Mode55
Plug and Play57
- Vga57
- What Is Plug and Play58
Display Data Channel Circuit59
- Ddc159
- DDC2B and DDC2AB59
- DDC Data Format (EDID)61
Horizontal Deflection63
- Horizontal Drive63
- Horizontal AFC65
- Horizontal Size Control67
- Pin Keystone, Bow and Geometric Corrections69
- Horizontal Centering (Raster Only)71
- Horizontal Linearity73
- Impedance Matching (S CAPS)75
Horizontal Deflection Shutdown77
- Protection77
High Voltage Circuit79
- High Voltage79
- High Voltage Regulation79
- G2 (Screen) Voltage79
- ABL (Auto Brightness Limiting)81
HV Protection83
- HV Shutdown83
- ABL Shutdown83
Dynamic Focus (DF) Circuit85
- Horizontal DF85
- Vertical DF87
Vertical Deflection89
- Vertical Drive89
- Vertical Geometric Corrections89
- Vertical Centering91
- Vertical Feedback Pulse91
Vertical Protection93
Rotation and Vertical Key Circuits95
- Rotation95
- Vertical Key95
Convergence Circuits97
- Static Convergence IC70497
- Dynamic Convergence IC70199

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