Charging Trouble - LG GD510 Service Manual

GD510 Operational Description

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 10m
4 Charging current : 525 mA
5 CV voltage : 4.2 V
6 Cutoff current : 75 mA
7 Full charge indication current (icon stop current) : 75 mA
8 Recharge voltage : 4.16 V
4.2V~3.69V
TP1
RPWRON_EN
R410
130K
RPWRON
R411
130K
Copyright © 2009 LG Electronics. Inc. All right reserved.
LG Electronics
Only for training and service purposes
3.69V~3.53V
Single Charging IC for uUSB
TP1
V_BUS
C401 C409
R405 R406
1uF 1uF
1.2Kohms 3.3Kohms
1%
1%
(450mA) (60mA)
3.53V~3.43V
VIO_2V62
R409 R408
DNI 100Kohms
11
PGND
1 10
IN BAT
2 9
U402
ISET _PG
BQ25040
3 8
VSS1 CHG
4 7
LDO VSS2
5 6
IFULL EN_SET
- 59 -
64/113
5. Trouble shooting
Revision A
3.43V~3.35V
VIO_2V62
VBAT
VIO_2V62
R407
100Kohms
TP2
C411
1uF
LGE Internal Use Only
LGE Property
TP2
_PPR
CHG_EOC
_CHG_EN