LG CU920 - Power ON Sequence Troubleshooting

LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 112 -
4.11 Charger Troubleshooting
TA
(5.1V)
Main
Battery
4.2~4.25V
Charging Current Flow
Pass Tr
(ON)
Battery FET
(ON)
Charging Procedure
- Connect TA or USB Cable
- Control the charging current by PM6650 IC
- Charging current flows into the battery
Check Point
- Connection of TA or USB Cable
- Charging current path
- Battery
Troubleshooting Setup
- Connect TA and battery to the phone
Troubleshooting Procedure
- Check the charger (TA or USB Cable) connector
- Check the charging current Path
- Check the battery