LG C1100 Service Manual page 63

4. Trouble Shooting
Checking Flow
SETTING : Connect the battery and the charging adaptor(TA) to the phone
START
Voltage at VCHG
of U102 = 5.2V?
R107, Q103, D101
well-soldered?
Voltage across
D101 = ~0.3V
Voltage across
R107 is ~100mV.
~0.7< Voltage
(Q103) < ~1.3V
Is the battery
charged ?
CHARGING WILL
OPERATE PROPERLY.
No
The charging adaptor(TA) is out of order.
Yes
No
Yes
No
Replace D101.
Yes
No
Replace R107.
Yes
No
Replace Q103.
Yes
No
The battery may have the problem.
Change the battery and try again.
Yes
Change the charging adaptor.
Resolder R102, U102, D101.
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