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4. TROUBLE SHOOTING
4.12 SIM Detect Trouble
4.12 SIM Detect Trouble
Setting : Insert the SIM into J301. Connect PIF to the phone, and power ON
Does the SIM supports
Check the contact between
Change the SIM and try
The SIM is malfunctioned.
J J 5 5 0 0 0 0
Figure 4-27
START
No
3V?
Yes
No
Voltage at pin 1 of
J500 = 2.85V ?
Yes
Check the soldering
condition of J500.
Yes
J500 and SIM card.
Yes
again. Does it work
properly?
Yes
Change the SIM.
I S
P P I I N N 1 1
Change the SIM. Our phone supports 3V SIM only.
Voltage at pin 18 of
U301 = 2.85V ?
Yes
No
Re-solder J500
No
Replace J500
Does it work properly after
No
re-downloading SW ?
Yes
SIM will be detected.
V
I S
M
V
R
5
0
4
2
0
K
I S
M
_
C
L
K
M
_
D
A
T
A
O
P
s
sv
s
D
C
5
0
2
C
5
0
3
N
A
N
A
sv
- 64 -
No
Replace U301.
Change
No
the main
board.
I S
M
V
I S
M
R
5
0
5
0
s
sv
D
G
N
D
4
G
N
D
3
9
8
G
N
D
5
G
N
D
2
1
0
7
I
O
C
L
K
6
3
V
P
P
R
S
T
5
2
G
N
D
1
V
C
C
4
1
sv
sv
D
J
5
0
0
C
5
0
2
2
0
n
I S
M
_
R
S
T
s
sv
D
s
sv
D
C
5
0
0
1
1
0
0
0
p
sv
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