Charger Troubleshooting - LG -P970 Service Manual

4.10 Charger Troubleshooting

Since LGP970 micro USB is located at the TOP of the terminal set, charging current flows via USB FPCB.
The charger IC accepts the current and maximum charging current is set around 945mA.
uUSB Connector
VCHG
USB_DM
USB_DP
USB_ID
Check Point
- Connection of TA or USB Cable
- Charging current path(RT954)
- Battery
Charging Procedure
- Connect TA or u-USB Cable
- Control the charging current by RT954 IC
- Charging current flows into the battery
LGE Internal Use Only
CN101
USB
6
8
10
USB_VBUS
12
14
1
2
3
4
5
7
9
11
13
15
C512
1u
CHARGER IC
Close to batt. connector
VCHG
TP1
C506
1u
11
PGND
1 10
VIN BATT
2 9
U502
ISET PGB
3 8
GND1 CHGSB
4 7
LDO GND2
5 6
IEOC EN_SET
Troubleshooting Setup
- Connect TA and battery to the phone
Troubleshooting Procedure
- Check the charger (TA or USB Cable) connector
- 140 - Copyright © 011 LG Electronics. Inc. All right reserved.
4. TROUBLE SHOOTING
Main
Battery
1.8V_VIO
VBAT
TP2
CHG_STATUS_N_OMAP
CHG_EN_SET_N_OMAP
C511
2.2u
Only for training and service purposes