Nokia NSB-9 Service Manual page 233

CCS Technical Documentation
Jammed
page2
Phone shutdown
after 30s
No
Measure DBUSClk
1 Mhz signal from
testpoint J413. Is it
OK?
OK?
Yes
Read phone info.
Is it OK?
Yes
Retest
Issue 1 04/03
Measure watchdog
Yes
signal CBUSDA
from testpoint J407
Is it OK?
No
Measure FBUSRX
No
signal during
phone info read
from testpoint 412.
Is it OK?
Measure FBUSTX
signal during phone
info read from
testpoint J411. Is it
OK?
Nokia Corporation
Troubleshooting Instructions
No
Yes
Yes
No
Yes
NSB-9
Change UPP
Change UEM
Change UPP
Change UEM
Page 59