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LGE Internal Use Only
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Only for training and service purposes
4. TROUBLE SHOOTING
CHECKING FLOW
START
Is I/O Connector(CN401)
well-soldered ?
Check the voltage at
TP01 (Charging IC(U401))=5.1V ?
YES
YES
Battery is charged?
YES
Charging is
properly operating
NO
NO
NO
Resolder the CN401
(Pin 1 : VBUS_USB)
The TA is out of order
Change the TA
Replace the main board
Battery is charged?
NO
Change the battery
Charging is
properly operating
YES