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FILE NO. 050-200513
SERVICE MANUAL
LCD Color Television
15DL15
15DL75
20DL75
TOSHIBA CORPORATION 2005 -1- Published in Japan, Sep. 2005 (YC)
TABLE OF CONTENTS
SERVICE SAFETY PRECAUTIONS ........................................................................................................................................ 3
HANDLEING THE LCD MODULE ........................................................................................................................................... 5
1. SERVICE MODE .................................................................................................................................................................. 7
1-1. STARTING SERVICE MODE ......................................................................................................................................... 7
2. ADJUSTMENT ..................................................................................................................................................................... 8
2-1. ADJUSTMENT TOOLS AND CONDITIONS ................................................................................................................. 8
2-2. AUTO GAIN/OFFSET ADJUSTMENT ........................................................................................................................... 8
2-3. DDC EDID DATA READ & WRITE ................................................................................................................................. 9
3. VCTI FIRMWARE INSTALLATIONS/UPGRADING ............................................................................................................ 19
3-1. VCTI FIRMWARE INSTALLATIONS ............................................................................................................................ 20
3-2. SCALER FIRMWARE INSTALLATIONS ...................................................................................................................... 26
4. TROUBLESHOOTING ........................................................................................................................................................ 33
5. EXPLODED VIEW .............................................................................................................................................................. 39
6. CHASSIS AND CABINET REPLACEMENT PARTS LIST ................................................................................................. 40
7. PC BOARDS TOP & BOTTOM VIEW ................................................................................................................................. 50
8. SCHEMATIC DIAGRAM ..................................................................................................................................................... 54
8-1. WIRING DIAGRAM ...................................................................................................................................................... 55
8-2. BLOCK DIAGRAM (20DL75) ....................................................................................................................................... 56
8-3. BLOCK DIAGRAM (15DL15,15DL75) ......................................................................................................................... 57
-2-
SERVICE SAFETY PRECAUTIONS
GENERAL ADJUSTMENTS