LG -D100F Service Manual page 72

Check the Connection of uUSB and battery
Is the uUSB Cable voltage 4.9V (or 5.0V)
Is it charging properly After turning on?
LGE Internal Use Only
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Connection OK?
Yes
Yes
No
Change the Charger IC
( U4101 )
Connection OK?
No
Change the Main PCB
No
Change I/O connector
No
Change TA (or uUSB Cable)
Yes
Yes
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3. TROUBLE SHOOTING
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Only for training and service purposes