Read LG TY-LCD20W / L202WA-BJB (CHASSIS:LM62C) Service Manual online
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2008 LG Electronics. Inc. All right reserved.
TROUBLESHOOTING GUIDE
1. NO POWER
NO POWER
(POWER INDICATOR OFF)
CHECK IC501
NO
NO
CHECK POWER BOARD,
AND FIND OUT A SHORT
POINT AS OPENING
EACH POWER LINE
AND FIND OUT A SHORT
POINT AS OPENING
EACH POWER LINE
CHECK IC702(1.8V)
IC703(3.3V) LINE
IC703(3.3V) LINE
NO
CHECK CRYSTAL(X501)
YES
YES
YES
CHECK P605 VOLTAGE
PIN5,6 (5V)?
IS IC702 PIN2(1.8V)
IC703 PIN2(3.3V)
CHECK X501 PIN201
PULSE
1
2
1
3
1
4
Waveforms
1
P605-#5,6
2
IC702-#2
3
IC703-#2
4
IC501-#201
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