LG GB220 - Page 77

- 78 -
LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
START
Is I/O Connector(CN300)
well-soldered ?
Check the voltage at
Pin 4 of ISL9221 = 5.1V ?
Is the voltage
at Pin 14 of ISL9221 = 4.7V
YES
YES
YES
Battery is charged?
YES
Charging is
properly operating
NO
NO
NO
Resolder the CN300
(Pin 12,13 : VCHARGE)
The TA is out of order
Change the TA
Replace the
U202
Replace the main board
CHECKING FLOW
Battery is charged?
NO
Change the battery
Charging is
properly operating
YES
NO