Charging Trouble - LG KC560 Service Manual

5.3 Charging trouble

Check Points
- Connection of TA (check TA voltage 5.1V)
-Charging Current Path component voltage drop
- Battery voltage
1 Charging method : CC-CV
2 Charger detect voltage : 4.0 V
3 Charging time : 2h 50m
4 Charging current : 434 mA
5 CV voltage : 4.2 V
6 Cutoff current : 107 mA
7 Full charge indication current (icon stop current) :
8 Recharge voltage : 4.15 V
4.2V~3.78V
_EOC
CHG_EN
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Only for training and service purposes
107 mA
3.78V~3.68V
2V62_VIO 2V62_VIO
VUSB_USB VCH G
_PPR
R242
TP1
100K C653 C654
1u 1u
3.68V~3.58V
U204 ISL9221
13
PGND
1
VDC
12
VDC_BYP
2
VUSB
11
BAT
3
_PPR
10
USB_BYP
4
_CHG
9
IVDC
5
_EN
8
GND
6
IMIN
7
IUSB
R243
5.1K
- 65 -
5. TROUBLE SHOOTING
3.60V~3.50V
VB AT
OVP_ VCH G
OVP_VUSB
TP2
R246 R244
R247
18K 15K
1u
(1%) (1%)
LGE Internal Use Only