User Guide

RAE-6/RA-4

Nokia Customer Care 6 - Baseband Description and Troubleshooting

44 COMPANY CONFIDENTIAL Issue 1 12/04

■ SIM troubleshooting

SIM fault No

End

Check

SIM connector

X2700 solderings

and SIM contacts.

Problem

fixed?

Yes

Measure VSIM

with oscilloscope from

X2700 pin 3. 1.8V and then

3.0V pulses lasting about

30ms should be seen right

after power up

without SIM.

Change

SIM asip R2700.

Problem

fixed?

Yes

Fault is in non-

reworkable

component. Refer to

current BER handling

guidance. (StUF

D2800 / UEMEK

D2200 problem).

Check

capacitors C2700

and C2221 in VSIM

line . OK?

Change

defect

capacitor(s).

Problem

fixed?