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LGE Internal Use Only
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
5. TROUBLE SHOOTING
START
6 pins are
soldered well?
Check Proper
SIM Card
Assemble
Resolder pin
Replace Main Board
Yes
Yes
No
Check All of SIM card voltage
GD310 support
2.9V SIM only
2V9_SIM
100K
R201
2V9_VMME
2V62_VIO
C206
1N
100K
R204
DNI
C207
R206
100K
C210
1U
DNI
C234
C239
27P
R219
4.7K
C245
10P
C246
100n
CN201
0
2
9
1
6
1
5
1
4
1
3
1
2
1
1
1
1
2
10
9
8
7
6
5
4
3
2
1
17
18
ST2
ST1
S4
T1
T2
T3
T4
T5
T6
T7
T8
S8
3
G
7
S
3
S
6
S
2
S
5
S
1
S
1
G
2
G
100K
R220
R221
100K
R224
100K
47
R226
MMC_DETECT
MMC_D[3]
MMC_D[0]
MMC_CMD
MMC_CLK
MMC_D[1]
MMC_D[2]
SIM_RST
SIM_IO
SIM_CLK