LG -A290 Service Manual page 73

START
Change the battery
Battery is charged?
Is I/O Connector(CN01)
well-soldered ?
Check the voltage at
TP3 = 3.5V~6.7V ?
Is the voltage
at TP4 = .8V
Is the voltage
at TP1= 4.9V
Is the voltage
at TP= 4.V
Battery is charged?
Charging is properly operating
LGE Internal Use Only
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Charging is properly operating
No
No
No
No
No
No
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4. TROUBLE SHOOTING
Resolder the CN01
(Pin 1 : VUSB_CHG_IN)
The TA is out of order
Change the TA
Replace the U101
Replace the
U03
Replace the
U03
Replace the main board
Only for training and service purposes