Sim Detect Trouble - LG C1100 Service Manual

4. Trouble Shooting

4.12 SIM Detect Trouble

SETTING : Insert SIM into J101, connect PIF to the Phone, and Power on.
Test Points
Checking Flow
PIN1
Figure 4-24.
START
Does the SIM
supports 3V?
Yes
Voltage at Pin 1
of J101 = 2.85V?
Yes
Check the
soldering condition
of J101.
Yes
Check the
contact between
J101 and SIM
card.
Yes
Change the
SIM and try again.
Does it work
properly?
Yes
The SIM is malfunctioned.
Change the SIM.
Circuit Diagram
SIM_DATA
VA165
No
Change the SIM.
Our Phone supports 3V SIM only.
No
Voltage VSIM of U102.
= 2.85V?
Resolder J101.
No
Resolder J101.
No
Replace J101.
No
Does it work properly after
redownloading SW?
SIM will be DETECTED.
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VSIM
VSIM
C115
J101
4 1
220n
GND1 VCC
5 2
VPP RST
6 3
IO CLK
10 7
GND5 GND2
9 8
GND4 GND3
GCA261-6S
No
Replace J101.
No
Change the main
board.
DBB
C117
0.1u
C116
1000p