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. BLOCK DIAGRAM ..................................................................................................................................................................... 5
2. ELECTRONIC CIRCUIT THEORY ................................................................................................................................................ 7
3. FACTORY PRESET TIMING TABLE ................................................................................................................................. 13
4. POWER ON/OFF SEQUENCY ................................................................................................................................................... 13
5. D-SUB CONNECTOR PIN ASSIGNMENT .................................................................................................................................. 14
6. AC OUTLET PIN ASSIGNMENT ............................................................................................................................................... 14
7. INNER CONNECTOR PIN ASSIGNMENT .................................................................................................................................... 14
8. KEY PARTS PIN ASSIGNMENTS ............................................................................................................................................... 16
CHAPTER 4- DISASSEMBLY & ASSEMBLY .................................................................................................................................. 21
1. EXPLODED DIAGRAM ............................................................................................................................................................. 21
2. E1909W DISASSEMBLY BLOCK ............................................................................................................................................. 22
3. ASSEMBLY BLOCK.................................................................................................................................................................. 23
CHAPTER 5- TEST AND ADJUSTMENT ......................................................................................................................................... 24
1. FUNCTION KEY DEFINITIONS .................................................................................................................................................. 24
2. OSD CONTROL....................................................................................................................................................................... 24
3. FACTORY MODE INTRODUCTION ............................................................................................................................................ 26
4. BURN-IN PATTERN .................................................................................................................................................................. 27
5. AUTO COLOR BALANCE (AUTOMATICALLY CALIBRATE CHIP ADC PARAMETER BY USING CHIP INTERNAL DAC.) ................ 27
6. UPLOAD FIRMWARE TO MCU VIA VGA CABLE...................................................................................................................... 27
7. AFTER REPAIR, TO ENSURE THE QUALITY YOU SHOULD DO THE FOLLOWING TEST AND ADJUSTMENT. ................................... 27
CHAPTER 6- TROUBLE SHOOTING ............................................................................................................................................... 30
1. COMMON ACKNOWLEDGE...................................................................................................................................................... 30
2. NO POWER LED OFF.............................................................................................................................................................. 30
3. POWER NORMAL LED AMBER................................................................................................................................................ 31
4. BACKLIGHT CAN’T BE TURNED ON ......................................................................................................................................... 33
5. NO PICTURE BACKLIGHT ON ................................................................................................................................................ 34
6. AT 32-GRAY SCALE PATTERN, COLOR LOST IN SOME SCALE .................................................................................................... 35
CHAPTER 7- RECOMMENDED PART LIST................................................................................................................................... 35
ATTACHMENT 1- BILL OF MATERIAL .......................................................................................................................................... 37
ATTACHMENT 2- SCHEMATIC ........................................................................................................................................................ 47
ATTACHMENT 3- PCB LAYOUT....................................................................................................................................................... 60
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