Charging Trouble; Battery Voltage - LG KG271 Service Manual

4.14 Charging Trouble

TEST POINT
Check Points
-Connection of TA (check TA voltage 5.2V)
-Charging Current Path component voltage
drop

-Battery voltage

-Charging IC
CIRCUIT
R119
CHARGE_DETECT
CHG_STATUS
(10V,K,X5R)
CHARGING IC
2V8_VIO
VCHARGE
R118
NA
U101
1.8K
1
VIN
2
_FAULT
R121
3
_STATUS
NA
4
C126
TIME
1u 5
GND
C127
11
PGND
0.015u
ISL9201IRZ-T
4. TROUBLE SHOOTING
R124
VBAT
C125
VBAT
10
VBAT
9
VSEN_TEMP
(10V,K,X5R)
8
IREF
7
V2P8
6
EN
C128 R124
1u 160K
(1%)
- 77 -
Charger
IC
U101
C126
VCHARGE
=5.2V
CN301
VCHARGE
C125 R120
1u NA
R122 0
CHG_EN_TEST
R123 NA
CHG_EN
R125
100K