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(POWER INDICATOR OFF)
CHECK J703 VOLTAGE
1
PIN5, PIN6 (5V)?
2
IS IC601 PIN1(3.3V)
IC601 PIN2(1.8V)
1 3
CHECK U501 PIN96
1 4
Waveforms
1
J703 -#5,6
Copyright
2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
TROUBLESHOOTING GUIDE
NO POWER
YES
YES
PULSE
YES
CHECK U501
2
IC601-#2
1. NO POWER
NO
NO
NO
3
IC601-#2
- 15 -
CHECK POWER BOARD,
AND FIND OUT A SHORT
POINT AS OPENING
EACH POWER LINE
CHECK IC601(3.3V)
IC601 (1.8V) LINE
CHECK CRYSTAL(X501)
4
U501-#96
LGE Internal Use Only
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