LG Flatron L226WTQ

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3. NO RASTER (OSD IS NOT DISPLAYED) - MAIN
1. CHECK PIN 127,128
SOLDERING CONDITION
2. CHECK X501
3. TROUBLE IN U501
CHECK U501
PIN114(3.3V)
PIN21(1.8V)
NO
NO
NO
CHECK U901(3.3V),
U902(1.8V)
U501
PIN 127,128
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
PIN32(H-SYNC) AND
PIN33(V-SYNC).
IS PULSE APPEARED AT
SIGNAL PINS?
YES
1
Waveforms
1
U501-#127