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NO POWER
(POWER INDICATOR OFF)
CHECK J905 VOLTAGE
1
PIN5, PIN6 (5V)?
2
IS U902 PIN2(1.8V)
IC1 PIN2(3.3V)
1 3
CHECK U501 PIN108
1 4
CHECK U501
Waveforms
1
P702-#5,6
Copyright
2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
TROUBLESHOOTING GUIDE
1. NO POWER
YES
YES
PULSE
YES
2
IC601-#2
NO
NO
NO
3
IC602-#2
- 15 -
CHECK POWER BOARD,
AND FIND OUT A SHORT
POINT AS OPENING
EACH POWER LINE
CHECK IC601(1.8V)
IC602(3.3V) LINE
CHECK CRYSTAL(X501)
4
IC501-#108
LGE Internal Use Only
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