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SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting and Circuit Diagrams
10-12
This Document can not be used without Samsung's authorization
10-1-3. Sim Part
Phone Can’t acc ess SIM Card
Pin 11, 14 at SIM400 =“H”?
After Power On
Check SIM_CLK Signal on
Pin 15 at SIM400
After SIM c ard insert,
SIM400 pin13 (C440)
=“High(SIM_RST)”
Check the SIM card
Yes
Yes
Yes
Yes
No
No
Replace U404
Check the SIM Clock
No
Resolder SIM400 or replace PBA
Phone Can’t acc ess SIM Card
Pin 11, 14 at SIM400 =“H”?
After Power On
Check SIM_CLK Signal on
Pin 15 at SIM400
After SIM c ard insert,
SIM400 pin13 (C440)
=“High(SIM_RST)”
Check the SIM card
Yes
Yes
Yes
Yes
No
No
Replace U404
Check the SIM Clock
No
Resolder SIM400 or replace PBA
7
8
ZD400
1
2
3
4
5
6
VCC_1.8V
VSIM_2.9V
1
52
4
R
7
34
C
30
4
R
V
04
4
C
VMMC_3.0V
32
4
R
22
4
R
12
4
R
02
4
R
20
4
R
V
00
4
R
V
10
4
R
V
93
4
C
83
4
C
NC
NC
24
25
NC
91
4
R
NC
26
27
NC
NC
28
18
NC
NC
19
20
NC
21
NC
NC
22
23
3
4
4
5
5
6
6
7
7
8
8
9
9
17
NC
10 10
11
11
12
12
13
13
14 14
15
15
16
16
2
2
3
SIM400
1
1
14
4
C
81
4
R
SIM_CLK
TF_DO(1)
TF_DO(2)
TF_DET
SIM_RST
SIM_IO
TF_DO(3)
TF_CMD_OUT
TF_CLK_OUT
TF_DO(0)
7
3
4
C
C439
0
4
4
C
1
4
4
C
C62 1
C622
R425
0
0
4
MI
S
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