LG KM710 Service Manual page 61

4. Trouble Shooting
4.4.4 Charging Current
- Charging Procedure
z Connecting TA & Charger Detection
z Control the charging Current by CHARGER IC
z Charging Current flow into the Battery
- Check Points
z Connection of TA
z Charger IC
z Battery
- Trouble Shooting Setup
z Connect Battery & TA to the handset
- Trouble Shooting Procedure
z Check the charger connector
z Check the charging current path
z Check the battery
TA
USB
CHG_EN
_EOC
CHG_EN
R803
100K
LGE Internal Use Only
ISL9221
VCHG_IN
U101
VBUS_IN
1
VDC
2
VUSB
3
_PPR
4
_CHG
5
_EN
6
IMIN
R106
C106 C107
1u 1u 5.1K
Battery
Charger power
USB power
ISL9221
13
PGND
12
VDC_BYP
11
BAT
10
USB_BYP
9
IVDC
8
GND
7
IUSB
R107 R108
18K 15K
Copyright © 2008 LG Electronics. Inc. All right reserved.
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VCHG VBAT
VBUS
C104 C108 C105
10u 10u
1u
Only for training and service purposes