Charging Trouble Shooting - LG -P350 Service Manual

4.11 Charging Trouble shooting

MicroUSB
SC500
1
CN501
6
7
8
1
2
3
4
USB_ID
5
ZD502
9
C564
10
11
22p
Main
2mm
Battery
Charging Procedure
- Connect TA or u-USB Cable
- Control the charging current by PM7540 IC
- Charging current flows into the battery
Check Point
- Connection of TA or USB Cable
- Charging current path(NUS5530MIN)
- Battery
LGE Internal Use Only
C561
22p
USB_DM
USB_DP
Charging IC
ISNS_P
ISNS_M
+VPWR
VBATT
C531
100u
1608
10V
Charging Current Flow
OVP
change circuit at REV B
OVLO IC2
3 5
IC1
4
U503
MAX14528
IN2 OUT2
2 8
IN1 OUT1
EUSY0374601
1 7
C562
1u
Q500 NUS5530MN
10
DRAIN_B
1%
1 9
NC1 COLLECTOR_B
2 8
COLLECTOR EMITTER
3 7
SOURCE BASE
4 6
DRAIN NC2
5
GATE
EQFP0008601
C532
10n
Troubleshooting Setup
- Connect TA and battery to the phone
Troubleshooting Procedure
- Check the charger (TA or USB Cable) connector
- Check the OVP Circuit
- Check the charging current Path
- Check the battery
- 113 - Copyright © 011 LG Electronics. Inc. All right reserved.
4. TROUBLE SHOOTING
VCHG_VBUS
GND1 GND2
IN OUT
FL500
TA
2mm
(5.1V)
VCHG_VBUS
2mm
CHG_CTL_N
BATT_FET_N
Only for training and service purposes