LG Flatron W1642C

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3. NO RASTER (OSD IS NOT DISPLAYED) - MAIN
1. CHECK PIN 108,109
SOLDERING CONDITION
2. CHECK X501
3. TROUBLE IN U501
CHECK U501
PIN2(3.3V)
PIN17(1.8V)
NO
NO
NO
CHECK U602(1.8V),
U601(3.3V)
U501
PIN 108,109
14.3MHZ?
CHECK CONNECTION LINE
FROM D-SUB TO U501
TROUBLE IN CABLE
OR LCD MODULE
YES
YES
NO RASTER
(OSD IS NOT DISPLAYED)
CHECK U501
PIN27(H-SYNC) AND
PIN28(V-SYNC).
IS PULSE APPEARED AT
SIGNAL PINS?
YES
1
Waveforms
4
U501-#108
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