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Charging is properly operating
LGE Internal Use Only
START
Change the battery
Battery is charged?
No
Is I/O Connector(TP1)
well-soldered ?
Yes
Check the voltage at
Pin 1 of TP2 = 5V?
Yes
Is the voltage
at C275 of TP2 = 4.9V
Yes
Battery is charged?
Yes
Yes
Charging is properly operating
No
Re-solder the TP1 (Pin 1 : VBUS_USB)
No
The TA is out of order Change the TA
No
Replace the U501
No
Replace the main board
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4. TROUBLE SHOOTING
Only for training and service purposes
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