LG KG270 Service Manual - Page 55
SIM Card Trouble
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4. TROUBLE SHOOTING 4.4. SIM Card Trouble TEST POINT R302/C310 C331/C332 J300.PIN1 CIRCUIT DIAGRAM 2V85_VSIM 2V85_VSIM R302 4.7K 0 R303 2V85_VSIM SIM_DATA C310 22p J300 4 1 5 GND VPP VCC RST 2 6 8 I_O CLK GND2 GND1 3 7 SIM_RST SIM_CLK C311 C312 0.1u 22p - 56 -
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4. TROUBLE SHOOTING
- 56 -
4.4. SIM Card Trouble
C331/C332
J300.PIN1
R302/C310
TEST POINT
CIRCUIT DIAGRAM
C311
0.1u
4.7K
R302
C310
22p
22p
C312
2V85_VSIM
2V85_VSIM
0
R303
I_O
6
2
RST
1
VCC
VPP
5
J300
CLK
3
4
GND
GND1
7
8
GND2
2V85_VSIM
SIM_CLK
SIM_RST
SIM_DATA