User Guide

CCS Technical Documentation Troubleshooting Instructions
Company confidential NPL-3
Issue 1 3/03 ãNokia Corporation. Page 37
Figure 35: Jammed phone troubleshooting (2)
Phone Shutdown
after 30s
Measure
watchdog signal
CBUSDA from J414.
Is it OK ?
Read phone info.
Is it OK ?
Measure
CBUSClk 1MHz signal
from testpoint J406.
Is it OK ?
Measure FBUSRx
signal during phone info
read from testpoint J412.
Is it OK ?
Measure FBUSTx
signal during phone info
read from testpoint J411.
Is it OK ?
Change
UPP
Change
UPP
Change
UEM
Change wv8
module or
retest
Yes
No
No
Yes
No
No
Yes
Yes
No
Change
UEM
No
Yes
Retest
Yes
Phone is
jammed
2