User Guide

CC Technical Documentation Troubleshooting - Baseband
RM-11
Issue 1 02/2004 ©2004 Nokia Corporation Confidential Page 45
Flash Programming Does Not Work
Flash
faults
Phone does not set
Flashbus TXD line
high after startup
Measure BSI pulse
during Flash
programming. Is it
OK?
Check BSI line X100,
C230, R203, R202
Measure FBusRx
(2.78V) signal during
flash programming
from production
pattern and test
point TP03 (1.8V). Is
it the same?
Reflow or change
UEM
Change UEM
Does the phone set
Flashbus TXD line
low after the line has
been high?
Flash
faults,
page 2
YES NO
YES
NO
NO
YES
Measure test point
FBusTx (TP05) (1.8V)
and production
pattern signal
FBusTxO (2.78V)
during flash
programming. Are
they the same?
NO
Measure MBusRx
(2.78V) and test
point TP01 (1.8V).
Are they the same?
Reflow or change
UPP
Is there a pulse on
TP05?
Is there a pulse on
FBusTx?
Reflow or change
UEM
Reflow or change
UEM
YES NO
NO
YES
NO
YES
NO
YES