LG KP105 Service Manual page 77

4. TROUBLE SHOOTING
Checking Flow
Is The Voltage of TP1 AND TP2
The Voltage of TP3 AND TP4
Check the voltage of TP5
LGE Internal Use Only
START
I/O Connector(CN301)
Is well-soldered ?
YES
Between 4.8 and 6.4V ?
YES
Is over 2.5V
YES
High or Low?
YES
Battery is charged?
YES
Charging is
properly operating
NO
Resolder the CN301
Pin 12,13 : VCHARGE
NO
The TA is out of order
Change the TA
LOW
Replace the
U102
NO
Check the U103
NO The battery may have
problems.
Change the battery.
Copyright © 2008 LG Electronics. Inc. All right reserved.
- 78 -
Only for training and service purposes