Only For Training And Service Purposes - LG GB220 Service Manual

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

Only for training and service purposes

Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes