Nokia 6020b Service Manual

 RM-31

Nokia Customer Care                                6(a) - Baseband Troubleshooting Instructions

10

COMPANY CONFIDENTIAL

Issue 1 03/2005

Copyright © 2005 Nokia. All Rights Reserved.

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Measure

BSI pulse during

Flash programming.

Is it OK?

Measure

FBUSTX line

during Flash

programming from

testpoint J2809.

Is it 1.8V?

Yes

No

Yes

No

No

Yes

No

Yes

Flash
faults

Does the phone set the 

Fbus TXD

 at J2809 line high after

the startup?

Does the phone set

Fbus TXD line

low  after the

line has

been high?

Flash 

faults

2

Change UPP

Change UPP

Change UEM

Check BSI 

line, X2000, 

C2001 - 

C2005, R2270, 

C2270, R2273

Retest