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