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4. TROUBLE SHOOTING
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4.9 Charger Troubleshooting
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
Battery Charging Circuit
1
EMITTER1
EMITTER2
2
6
GATE
9
P_COLLECTOR
P_DRAIN
10
SOURCE
4
NUS3116MTR2G
U304
BASE1
8
BASE2
7
3
COLLECTOR
DRAIN
5
0.1
R315
ICHARGE
ICHARGEOUT
VBATT
VBATT
+5V_PWR
USB_VBUS
CHG_CTL_N
USB_CTL_N
BATT_FET_N
+VPWR
Summary of Contents for U370
Page 1: ...Date January 2008 Issue 1 0 Service Manual Model U370 Service Manual U370 ...
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