LG KE600 - Cell Phone Service Manual page 94

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