LG GX500 Service Manual

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LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
GX500 Operational Description Revision A
LG Electronics 78/143 LGE Property
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 : 4.8 V
3 Charging time : 3h 15m
4 Charging current : 680 mA
5 CV voltage : 4.2 V
6 Cutoff current : 120 mA
7 Full charge indication current (icon stop current) : 120 mA
8 Recharge voltage : 4.16 V
4.2V~3.75V 3.75V~3.65V 3.65V~3.58V 3.58V~3.30V
TP1
TP2
Figure 4-6. Charging circuit
K3.3
2
23
R
057
523R
1uF
C336
123R
IND
2V62_VIO
C337
1uF
V_BUS
smhoK001
323R
2V62_VIO
423R
smhoK001
VBAT
1uF
C338
BQ25040
U310
5
6
74
83
92
101
11
PGND
IN BAT
ISET _PG
VSS1 CHG
LDO VSS2
EN_SETIFULL
2V62_VIO
_EOC
_PPR
RPWRON_EN
_CHG_EN
560 ohm->(910mA)
)
%
1
(
)%1(
SINGLE CHARGING IC
820 ohm->(646mA)
2K(10%)->91mA
780 ohm->(680mA)
TP2TP1

LG GX500 Specifications

General

Brand	LG
Model	GX500
Category	Cell Phone
Language	English