Service Manual
2
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
1. B
LOCK DIAGRAM ....................................................................................................................................................................... 5
2. E
LECTRONIC CIRCUIT THEORY ................................................................................................................................................... 7
3. FACTORY
PRESET TIMING TABLE..................................................................................................................................... 13
4. P
OWER ON/OFF SEQUENCY..................................................................................................................................................... 13
5. D-SUB
CONNECTOR PIN ASSIGNMENT ..................................................................................................................................... 14
6. AC
OUTLET PIN ASSIGNMENT .................................................................................................................................................. 14
7. I
NNER CONNECTOR PIN ASSIGNMENT........................................................................................................................................ 14
8. K
EY PARTS PIN ASSIGNMENTS.................................................................................................................................................. 16
CHAPTER 4- DISASSEMBLY & ASSEMBLY ........................................................................................................................................ 21
1. E
XPLODED DIAGRAM ............................................................................................................................................................... 21
2. E1709WFP
F DISASSEMBLY BLOCK .......................................................................................................................................... 22
3. A
SSEMBLY BLOCK ................................................................................................................................................................... 23
CHAPTER 5- TEST AND ADJUSTMENT............................................................................................................................................... 24
1. F
UNCTION KEY DEFINITIONS ..................................................................................................................................................... 24
2. OSD
CONTROL....................................................................................................................................................................... 24
3. F
ACTORY MODE INTRODUCTION................................................................................................................................................ 26
4. B
URN-IN PATTERN.................................................................................................................................................................... 27
5. A
UTO COLOR BALANCE (AUTOMATICALLY CALIBRATE CHIP ADC PARAMETER BY USING CHIP INTERNAL DAC.)................................... 27
6. U
PLOAD FIRMWARE TO MCU VIA VGA CABLE ............................................................................................................................ 26
7. A
FTER REPAIR, TO ENSURE THE QUALITY YOU SHOULD DO THE FOLLOWING TEST AND ADJUSTMENT. .................................................. 27
CHAPTER 6- TROUBLE SHOOTING..................................................................................................................................................... 30
1. C
OMMON ACKNOWLEDGE......................................................................................................................................................... 30
2. N
O POWER LED OFF .............................................................................................................................................................. 30
3. P
OWER NORMAL LED AMBER ................................................................................................................................................... 31
4. B
ACKLIGHT CAN’T BE TURNED ON .............................................................................................................................................. 32
5. N
O PICTURE BACKLIGHT ON.................................................................................................................................................... 33
6. A
T 32-GRAY SCALE PATTERN, COLOR LOST IN SOME SCALE........................................................................................................... 34
CHAPTER 7- RECOMMENDED PART LIST.......................................................................................................................................... 35
ATTACHMENT 1- BILL OF MATERIAL.................................................................................................................................................. 37
ATTACHMENT 2- SCHEMATIC.............................................................................................................................................................. 47
ATTACHMENT 3- PCB LAYOUT............................................................................................................................................................ 52
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