Charging Trouble - LG GD310 Service Manual

5.3 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 40m
4 Charging current : 380 mA
5 CV voltage : 4.2 V
6 Cutoff current : 110 mA
7 Full charge indication current (icon stop current) : 110 mA
8 Recharge voltage : 4.16 V
4.2V~3.69V
VBUS_USB
RPWRON_EN
C323 C308
1U 1U
ECZH0003503
(25V,K,X5R, 1608)
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.69V~3.53V
TP1
U300
1
IN
2
ISET
3
VSS1
4
LDO
5
IFULL
BQ25040
R318 R319
1.2k 2K
3.53V~3.43V
2V62_VIO VBAT
R310
100K
11
PGND
10
BAT
9
_PG
8
CHG
7
VSS2
6
EN_SET
C325
1U
ECZH0001215
(10V,K,X5R, 1005)
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5. TROUBLE SHOOTING
3.43V~3.35V
2V62_VIO 2V62_VIO
R314
R317
100K
DNI
_PPR
_EOC
_CHG_EN
TP2
LGE Internal Use Only