LG GD330 - Adding an Event to Your Calendar; Adding an Item to Your To-Do List

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Only for training and service purposes
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4. TROUBLE SHOOTING
Re-solder the CN300
(Pin 12,13)
START
I/O Connector (CN300,Main)
Is well-soldered?
Check the FB300,FB301(Main),
Is it OK?
Voltage at TP1 of U200(Main)
=4.8?
Voltage at TP2 of U200(Main)
Is LOW in case charging ?
Battery is OK?
Re-solder the FB300, FB301(Main)
Replace the U200(Main)
The IC out of order.
Replace the IC
The Battery may have Problem.
Change Battery
Charging is operating properly
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
U200
CC
Voltage
Recharging
CV
TP2
TP1