LG FLATRON W2486L Service Manual page 16

NO RASTER
(OSD IS NOT DISPLAYED)
CHECK ADAPTER
INPUT VOLTAGE 4PIN
OF JK300( 12V)
CHECK IC301
PIN2(1.8V) AND
CHECK IC302 PIN2(3.3V)
CHECK PIN 10( 3.3V)
AND PIN 11( DIMMING)
OF IC101
CHECK FET( Q407)
SWITCHING OPERATION
CHECK voltage (24": 46.2V typ,
22": 29.25V typ) of lamp wire
of the LCD module
Copyright LG Electronics. Inc. All right reserved.
Only for training and service purposes
2. NO RASTER (OSD IS NOT DISPLAYED) – INVERTER
YES
YES
YES
YES
NO
A SHORT POINT AS OPENING EACH
CHECK REGULATOR AND FIND OUT
NO
A SHORT POINT AS OPENING EACH
NO
CHECK THE LINES BETWEEN IC101
NO
CHECK IC 400 AND Q407 OPERATION
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CHECK ADAPTER AND FIND OUT
POWER LINE
POWER LINE
AND IC 400
LGE Internal Use Only