Charging Trouble - LG KS360 Service Manual

5. Trouble shooting

5.3 Charging trouble

Check Points
-Connection of TA (check TA voltage 5.6V)
-Charging Current Path component voltage drop
-Battery voltage
1 Charging method : CC-CV
2 Charger detect voltage : 4.0 V
3 Charging time : 2h 30m
4 Charging current : 420 mA
5 CV voltage : 4.2 V
6 Cutoff current : 100 mA
7 Full charge indication current (icon stop current) : 100 mA
8 Recharge voltage : 4.15 V
4.2V~3.75V
VCHG VBAT
TP1
FB200 1800
FB201 1800
FB202 1800
FB203 1800
R228
R229
FB206
47
R230 0
47
47
LGE Internal Use Only
3.75V~3.64V
2V0_VRTC
CN200
21
19
1
2
EOC
3
4
CHG_EN
5
1 6
7
1
8
1800
9
10
11
12
13
14
15
16
17
18
20
22
3.64V~3.45V
CHARGING IC OVP
2V62_VIO VBUS_USB VCHG
U201
1
VDC
VDC_BYP
2
VUSB
3
_PPR
USB_BYP
4
_CHG
5
_EN
6
IMIN
C209 C210
1u 1u
(1%)
Copyright © 2008 LG Electronics. Inc. All right reserved.
- 70 -
3.45V~3.35V
VBAT VCHG_OVP VBUS_OVP
ISL9221
13 TP2
PGND
12
11
BAT
10
9
IVDC
8
GND
7
IUSB
C211 C212
1u 1u
(1%)
(1%)
Only for training and service purposes
C213
1u