Read LG TY-LCD20W / L202WA-BJB (CHASSIS:LM62C) Service Manual online
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3. NO RASTER (OSD IS NOT DISPLAYED) - MAIN
1. CHECK PIN 201,202
SOLDERING CONDITION
2. CHECK X501
3. TROUBLE IN IC502
3. TROUBLE IN IC502
CHECK IC502
PIN7(3.3V)
PIN131(1.8V)
NO
NO
NO
CHECK IC702(1.8V),
IC703(3.3V)
IC703(3.3V)
IC501
PIN 201,202
14.3MHZ?
CHECK CONNECTION LINE
FROM D-SUB TO IC502
FROM D-SUB TO IC502
TROUBLE IN CABLE
OR LCD MODULE
YES
YES
NO RASTER
(OSD IS NOT DISPLAYED)
CHECK IC502
PIN168(H-SYNC) AND
PIN169(V-SYNC).
IS PULSE APPEARED AT
SIGNAL PINS?
YES
1
Waveforms
1
U502-#201
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