Table of Contents
CHAPTER 1- PRECAUTIONS & SAFETY NOTICES ..................................................................................................................... 3
1. SAFETY PRECAUTIONS ............................................................................................................................................................ 3
2. PRODUCT SAFETY NOTICE...................................................................................................................................................... 3
3. SERVICE NOTES.......................................................................................................................................................................... 3
CHAPTER 2- SERVICE TOOLS & EQUIPMENT REQUIRED ..................................................................................................... 4
CHAPTER 3- CIRCUIT THEORY ...................................................................................................................................................... 5
2. INTERFACE BOARD DIAGRAM ................................................................................................................................................... 5
3. ELECTRONIC CIRCUIT THEORY.......................................................................................................................................................... 6
CHAPTER 4- DISASSEMBLY & ASSEMBLY ................................................................................................................................... 9
1. EXPLODED DIAGRAM ........................................................................................................................................................................ 9
2. DISASSEMBLY BLOCK ..................................................................................................................................................................... 10
3. ASSEMBLY BLOCK........................................................................................................................................................................... 11
CHAPTER 5- TEST AND ADJUSTMENT ........................................................................................................................................ 12
1. GENERAL POINTS ............................................................................................................................................................... 12
1.1 TEST EQUIPMENT OR TOOL................................................................................................................................................ 12
1.2 PRESET TEST PATTERN ....................................................................................................................................................... 12
1.3 AC INPUT............................................................................................................................................................................. 12
1.4 OBSERVATION DISTANCE .................................................................................................................................................... 12
1.5 KEY FUNCTION DESCRIPTION ............................................................................................................................................ 12
1.6 BURN-IN (AGING) PATTERN ................................................................................................................................................ 13
1.7 WARM UP............................................................................................................................................................................. 13
2. INPUT SIGNAL...................................................................................................................................................................... 13
2.1 VIDEO SIGNAL INPUT .......................................................................................................................................................... 13
3. FUNCTION CHECK ............................................................................................................................................................. 15
3.1 OSD FUNCTION TEST ......................................................................................................................................................... 15
3.2 SCREEN PICTURE CHECK ................................................................................................................................................... 15
3.3 AUTO COLOR BALANCE...................................................................................................................................................... 15
3.4 TIMING CHECK ................................................................................................................................................................... 15
3.5 POWER CONSUMPTION FUNCTION TEST............................................................................................................................ 15
3.6 VGA CABLE DETECT TEST................................................................................................................................................. 16
3.7 HI-POT TEST........................................................................................................................................................................ 16
3.8 GROUNDING TEST ............................................................................................................................................................... 16
3.9 BUMPING TEST .................................................................................................................................................................... 16
4. DISPLAY CHECK.................................................................................................................................................................. 16
4.1 PANEL FLICKER CHECK...................................................................................................................................................... 16
4.2 PANEL DEFECT INSPECTION ............................................................................................................................................... 16
5. PICTURE CHECK................................................................................................................................................................. 17
5.1 CHECK BRIGHTNESS UNIFORMITY...................................................................................................................................... 17
5.2 COLOR TEMPERATURE CHECK .......................................................................................................................................... 18
5.3 BRIGHTNESS OUT (VIDEO SIGNAL INPUT 700MV ± 2%).................................................................................................... 19
5.4 DDC DATA CHECK .............................................................................................................................................................. 19
CHAPTER 6- TROUBLE SHOOTING.............................................................................................................................................. 20
1. NO POWER & LED OFF................................................................................................................................................................... 20
ATTACHMENT 1- BILL OF MATERIAL......................................................................................................................................... 27
PCBA P+I .............................................................................................................................................................................................. 27
ATTACHMENT 2- SCHEMATIC....................................................................................................................................................... 33
ATTACHMENT 3- PCB LAYOUT ..................................................................................................................................................... 41
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