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4. TROUBLE SHOOTING
4.8 Charger Troubleshooting ( USB Charging)
Charging Procedure
- Connect USB
- Control the charging current by PM6650 IC
- Charging current flows into the battery
Check Point
- Connection of USB
- Charging current path
- Battery
Troubleshooting Setup
- Connect USB and battery to the phone
Troubleshooting Procedure
- Check the charger connector
- Check the charging current Path
- Check the battery
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Battery Charging Circuit
COLLECTOR
3
5
DRAIN
EMITTER1
1
2
EMITTER2
GATE
6
P_COLLECTOR
9
10
P_DRAIN
4
SOURCE
U805
NUS3116MTR2G
8
BASE1
7
BASE2
R414
0.1
ICHARGE
ICHARGEOUT
VBATT
VBATT
+5V_PWR
USB_VBUS
CHG_CNT_N
USB_CNT_N
BATT_FET_N
+VPWR
Main Battery
USB Cable
Turn to low
About 5 V