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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4. TROUBLE SHOOTING
LGE Internal Use Only
START
Is I/O Connector(CN302)
well-soldered ?
Check the voltage at
TP1= 5.1V ?
YES
YES
YES
YES
Battery is charged?
YES
Charging is
properly operating
NO
NO
NO
NO
NO
Resolder the CN302
(Pin 12,13 : VCHARGE)
The TA is out of order
Change the TA
Replace the R120,R123
Replace the main board
CHECKING FLOW
Battery is charged?
NO
Change the battery
Charging is
properly operating
YES
NO
Replace the
U102
Check the voltage at
C312 = 5.1V ?
Replace the
FB303
Is the voltage
at pin 12 of U102 = 5.1V?
(TP1)
Is the voltage
of R120 = 2.5V?
(TP2)