Charging Trouble - LG GM360i Service Manual

4. TROUBLE SHOOTING

4.3 Charging trouble

Check Points
-Connection of TA (check TA voltage 4.8V)
-Charging Current Path component voltage drop
-Battery voltage
1 Charging method : CC-CV
2 Charger detect voltage : 4.0 V
3 Charging time : 2h 00m
4 Charging current : 650 mA
5 CV voltage : 4.2 V
6 Cutoff current : 150 mA
7 Full charge indication current (icon stop current) : 150 mA
8 Recharge voltage : 4.15 V
4.2V~3.74V
Pattern width over 2mm.
TP2
TP1
TP2
RPWRON_EN
C209
LG Electronics
LGE Internal Use Only
3.73V~3.64V
Single Charging IC for uUSB
V_BUS
TP1
1
IN
2
ISET
3
VSS1
4
LDO
5
IFULL
C239
1uF
1uF
Tol. 1%
(650mA) (150mA)
69/147
3.63V~3.54V
VIO_2V62 VBAT
11
PGND
10
R227
BAT
U201
9
_PG
0
8
CHG
7
R18
VSS2
6
EN_SET
0
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Copyright © 2010 LG Electronics. Inc. All right reserved.
3.53V~3.35V
VIO_2V62 VIO_2V62
_PPR
_CHG_EOC
_CHG_EN
C218
1uF
LGE Property
Only for training and service purposes