LG Flatron W2242T

TROUBLESHOOTING GUIDE
1. NO POWER
NO POWER
(POWER INDICATOR OFF)
CHECK U501
NO
NO
CHECK POWER BOARD,
AND FIND OUT A SHORT
POINT AS OPENING
EACH POWER LINE
CHECK U602(1.8V)
U601(3.3V) LINE
NO
CHECK CRYSTAL(X501)
YES
YES
YES
CHECK J703 VOLTAGE
PIN5, PIN6 (5V)?
IS U602 PIN3(3.8V)
U601 PIN3(3.3V)
CHECK U501 PIN108
PULSE
1
2
13
14
Waveforms
1
J703-#5,6
2
U602-#2
3
U601-#2
4
U501-#108
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Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only