Samsung GT-S8500 - Use the touch screen

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Level
3
Repair
8-9
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8-3-3.
SIM
Is there any signals at
C429, C432, C427, C431
NO SIM
Check the connection of
the HDC404
Check U302
Check the SIM socket
No
Yes
Yes
Yes
Yes
No
No
Check the voltage at C432
>=2.8V ?
Check U302
Check the voltage at C431,
C432
>= 2.8V ?
Yes
Check U602
No
END
C428 C430
VREG_USIM_2.85V
1
8
1
9
N
C
N
C
2
0
344
5566
7788
99
1
7
N
C
N
C
1111 1212
13
13
14
14
15
15
16
16
22
3
HDC404
11
1010
R425
C432 C427C429 C431
SIM_RST
SIM_CLK
SPK_OUT_N
SPK_OUT_P
SIM_IO
BTC600
C
2
0
7
C225
C226
C
2
3
2
C
2
4
6
C247
C249
C
4
2
7
C
4
2
8
C
4
2
9
C
4
3
0
C
4
3
1
C
4
3
2
HDC404
L206
L207
R
2
0
0
R
2
0
4
R
2
0
7
R228
R229
R425
T
A
6
0
9
Z
D
6
0
1