Baseband Troubleshooting Instructions
CCS Technical Documentation
Page 46
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Nokia Corporation
Issue 1 10/02
Figure 52: SIM Card
SIM card
Insert SIM card
faults?
Set phone
in LOCAL mode.
Is it OK?
Yes
Check BSI line,
X101, C241,
R203, C109,
and R202.
If OK ->
change UEM.
No
Measure VSIM voltage
from X386
Is it 3 V?
Check VSIM line, X386,
C203, and C389.
If OK -> change R388.
If still wrong VSIM
voltage -> change UEM.
No
Check SIM
power UP sequence.
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