User Guide

CCS Technical Documentation
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SIM card is out of order (insert SIM card)
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SIM card
Insert SIM card
faults
in LOCAL mode
Is it OK ?
Yes
Check BSI line
X101, C202
C104, C240
R260
If OK –>
Change UEM
No
Measure VSIM voltge
from X386
Is it 3V ?
Check VSIM line,X386,
C203, C389.
If OK –> Change R388.
If still wrong VSIM
voltage –> Change UEM
No
Check SIM
power UP sequency
Is it OK ?
Yes
Check SIM lines.
If OK –> Change R388.
If still fail –> Change UEM
No
Change UPP
Yes
END
No
Check X386
Yes
Set phone
*
*
VSIM
SIMCLK
SIMDATA
SIMRST
First 1.8 V
then 3.0 V