Charging Trouble - LG -C300 Service Manual

4.5 Charging Trouble

TEST POINT
CIRCUIT
CHARGING IC
LDO_OUT
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
VBUS_USB
TP1
TP1
1
VIN
2
ISET
3
GND1
4
LDO
5
IEOC
C222 C223
R233
R234
1u
0.1u
820 3.9K
(25V)
4. TROUBLE SHOOTING
CN201
Figure 4.5
VBAT
11
PGND
10
BATT
9
U203
PGB
8
RT9524
CHGSB
EUSY0410801 7
GND2
6
EN_SET
C221
1u
(10V)
- 75 -
4. TROUBLE SHOOTING
U203
C223
1V8_VDD
R217
100K
_EOC
CHG_EN
C257
0.1u
LGE Internal Use Only