ViewSonic P774B-2NT Series, Service Manual

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TABLE OF CONTENTS
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1. SPECIFICATIONS .....................................................................................… 2
2. PRECAUTION AND NOTICES ...................................................................... 4
2-1 SAFETY PRECAUTIONS .................................................................... 4
2-2 PRODUCT SAFETY NOTICE ............................................................. 4
2-3 SERVICE NOTES ............................................................................... 4
2-4 HIGH VOLTAGE WARNING ............................................................... 5
3. OPERATING INSTRUCTIONS ...................................................................... 6
4. ADJUSTMENT ...........................................................................................… 7
4-1 ADJUSTMENT CONDITIONS AND PRECAUTIONS ......................... 7
4-2 MAIN ADJUSTMENTS ........................................................................ 7
4-3 ADJUSTMENT METHOD .................................................................... 7
4-4 EDID CONTENTS................................................................................ 10
5. CIRCUIT DESCRIPTION ............................................................................... 11
5-1 MICRO CONTROLLER CIRCUIT .............................…………………. 11
5-2 DEFLECTION CIRCUIT .............................……………………………. 11
5-3 TRANSISTOR & DIODE CIRCUIT .............................………………… 12
6. TROUBLE SHOOTING CHART ..................................................................... 13
6-1 NO RASTER, CRT RELATIVE CIRCUIT PROBLEMS ....................... 13
6-2 ABNORMAL DISPLAY ........................................................................ 15
6-3 NO BLANKING .................................................................................... 16
6-4 HOR. /OSC /DEF /HV CIRCUIT FAULT .............................................. 16
6-5 ABNORMAL HORIZONTAL DEFLECTION ........................................ 17
6-6 ABNORMAL VERTICAL SCANNING .................................................. 18
6-7 SIDE-PIN CUSHION DISTORTION .................................................... 18
6-8 POOR FOCUS .................................................................................... 18
6-9 POWER SUPPLY TROUBLE SHOOTING CHART ............................ 19
7. MECHANICAL OF CABINET FRONT DIS-ASSEMBLY................................. 20
8. BOM LIST..........................................................................................……… 21
9. BLOCK DIAGRAM .....................................................................…………….. 36
10. IC BLOCK DIAGRAMS................................................................................... 38
11. PCB LAYOUT ................................................................................................ 42
12. SCHEMATIC DIAGRAM ................................................................................ 44