Samsung SGH-U900 Service Manual page 49

Flow Chart of Troubleshooting
PM_SIM_RST
PM_SIM_CLK
VSIM_3.0V
C448 C449 C450
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SIM400
6 6
1 1
5
2 2 5
4 4
3 3
7 12 12
7
8 8 11 11
9 9 10 10
G G G G
16 15 14 13
10-7
R421
PM_SIM_IO
C440