LG GW520 - Page 73

- 74 -
LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
5. Trouble shooting
GW520 service manual
TP1
TP2
TP3
Circuit Diagram
TP1
TP2
TP3
TP1
TP2
TP3
Circuit Diagram
TP1
TP2
TP3
FL300
U302
Checking Point
TP1
TP2
TP3
FL300
U302
TP1
TP2
TP3
FL300
U302
Checking Point
(25V,K,X5R, 1608)
(10V,K,X5R, 1005)
ECZH0003503
ECZH0001215
2V62_VIO
VBUS_USB
R313
100K
C330
1u
C331
1u
R312
100K
R315
820 2K
R314
C332
0.1u
DNI
R311
LDO
4
PGND
11
3
VSS1
VSS2
7
_PG
9
U302 BQ25040
EUSY0388501
10
BAT
8
CHG
6
EN_SET
1
IN
ISET
2
ITERM
5
2V62_VIO
2V62_VIOVBAT
_CHG_EOC
_CHG_EN
_PPR
RPWRON_EN
2
SFEY0006501
NFM21PC105B1A3
FL300
3
G1 G2
4
IN
1
OUT
C314
10p
L300
270nH
CN301
1
10
11
2
3
4
5
6
7
8
9
ENRY0008101
GU071-5P-SD-E1500
R306 220
HB-1T1005-221JT
220R305
VBUS_USB
MUIC_ID
FM_ANT
MUIC_DP
MUIC_DM
TP1
TP2
TP3