Nokia RH-44 Series Troubleshooting - Bb page 27

CCS Technical Documentation
Flash programming doesn't work
Flash faults
Phone does not set
Flashbus TXD line
high after startup
No
Phone does not set
Flashbus TXD line low
after the line has been
high
No
Flash faults page 2
Issue 1 04/2003
Measure BSI pulse
during Flash
Yes
programming. Is it
OK?
Yes
Measure FBusRx
FBusTX and MBUS
during flash
programming at
bottom connector.
Does waveform match
Figure 2?
Change UEM
Yes
Yes
Nokia Corporation
Troubleshooting — BB
Check BSI line X110,
No
C230, R203, R202
Check R100, R101,
R104, C104, C105,
No
and V101. If OK, then
change UEM or UPP
Confidential
RH-44
Page 27