User Guide

Troubleshooting Instructions CCS Technical Documentation
Page 30 ãNokia Corporation. Issue 1 01/03
SIM card
faults
Insert SIM card faults
Set phone to
LOCAL mode.
Is it OK ?
Measure VSIM
voltage from X386.
Is it 3V (1.8V)
Check SIM
power up sequency.
Is it OK ?
Check BSI line, X100,
C240, R203, R206. If
OK change UEM
Check VSIM
line,X386,
C203,C370, L386. If
OK change R388. If
still wrong VSIM
change UEM
Check SIM lines. If
OK change R388. If
still fail change UEM.
Change UPP
END
Check X386
Yes
No
No
Yes
No
Yes
No
Yes