Charger Troubleshooting - LG KU380 Service Manual

4. TROUBLE SHOOTING

4.10 Charger Troubleshooting

+5V_PWR
USB_VBUS
ICHARGE
ICHARGEOUT
+VPWR
Charging Procedure
- Connect TA or USB Cable
- Control the charging current by PM6650 IC
- Charging current flows into the battery
Troubleshooting Setup
- Connect TA and battery to the phone
Check Point
- Connection of TA or USB Cable
- Charging current path
- Battery
Troubleshooting Procedure
- Check the charger (TA or USB Cable) connector
- Check the charging current Path
- Check the battery
LGE Internal Use Only
10
VBATT P_DRAIN
1
EMITTER1
2
EMITTER2
3
COLLECTOR
4
SOURCE
U304
9
P_COLLECTOR
8
BASE1
7
BASE2
6
GATE
5
DRAIN
NUS3116MTR2G
Copyright © 2007 LG Electronics. Inc. All right reserved.
- 96 -
CHG_CTL_N
USB_CTL_N
BATT_FET_N
VBATT
Only for training and service purposes