LG KE600 Service Manual - Page 94
SIM card trouble
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5. Trouble shooting 5.11 SIM card trouble Check Points -Power control FET is working -Socket soldering -Proper SIM is used 2V85_SIM S SI1305-E3 G Q301 D SIM_ENn SIM_IO C340 22p R339 4.7K R340 NA J301 4 1 5 GND1 VCC 2 6 VPP RST 3 10 IO CLK 7 GND5 GND2 9 GND4 GND3 8 C339 0.1u SIM_RST SIM_CLK C341 22p Checking Point Q301 Pin 5 / 2V85_SIM Check soldering all pin of socket 1 2 3 4 56 Pin 3 / SIM_CLK - 95 -
5. Trouble shooting
- 95 -
5.11 SIM card trouble
Check Points
-Power control FET is working
-Socket soldering
-Proper SIM is used
Checking Point
2V85_SIM
22p
C340
C341
22p
0.1u
C339
CLK
3
4
GND1
GND2
7
8
GND3
GND4
9
10
GND5
IO
6
2
RST
1
VCC
VPP
5
J301
D
G
S
SI1305-E3
Q301
4.7K
R339
NA
R340
SIM_CLK
SIM_RST
SIM_IO
SIM_ENn
Pin 5 /
2V85_SIM
Pin 3 /
SIM_CLK
Check
soldering all
pin of socket
1
2
3
4
5 6
Q301