Charging Trouble; Only For Training And Service Purposes - LG GC900F Service Manual

5.3 Charging Trouble

Charging Checking Flow
Charging Checking Flow
Start
YES YES
Change the battery.
Change the battery.
If voltage level of battery is under 3.2v
If voltage level of battery is under 3.2v
Then wait by above 3.2V
YES YES
Is voltage 5.6V at C794? Is voltage 5.1V at C424?
TP1 TP1
YES YES
Is voltage 4.7 V at SAFEOUT?
Is voltage 4.9V at VDC BYP?
TP2 TP2
YES YES
Is voltage 4.7V at ? Is voltage 4.7V at ?
TP3 TP3
YES YES
Does Charging work well?
Does Charging work well?
YES YES
END
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Only for training and service purposes

NO NO
1. 1. Check soldering or change FL401 Check soldering or change FL401
2. 2. 2.Change TA 2.Change TA
NO NO
Change U202 Change U405
NO NO
Change soldering or change D200 Change soldering or change D200
NO NO
Is voltage above 0.64V Is voltage above 0.64V
at R100 at R102
YES YES
Does charging work Does charging work
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5. Trouble shooting
GC900 service manual
NO NO
Resolder R102,R106 Resolder R100,R103
Or change main Or change main
board board
YES YES
NO NO
Change the main Change the main
board board
LGE Internal Use Only