LG KF350 Service Manual page 83

4. TROUBLE SHOOTING
MMC_D(1)
MMC_D(0)
MMC_CLK
MMC_CMD
MMC_D(3)
MMC_D(2)
MMC_DETECT
2V62_VIO
LGE Internal Use Only
2V9_VMME
C312
1u
R334
47
C322
DNI
R335
100K
C324
1000p
START
Check All of SIM card voltage
KF350 support
2.9V SIM only
6 pins are
soldered well?
Yes
Check Proper
SIM Card
Assemble
2V9_SIM
C314
0.1u
S8
10
T8
9
T7
8
T6
7
T5
6
T4
5
T3
4
T2
3
T1
2
S4
1
ST1
17
ST2
18
No Resolder pin
Yes
Replace Main Board
Copyright © 2008 LG Electronics. Inc. All right reserved.
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SIM_RST
SIM_CLK
SIM_IO
C315 C313
C316
27p DNI
10p
Only for training and service purposes