Nokia 6255 Description And Troubleshooting page 54

6255/6255i6256/6256i (RM-19)
Baseband Description and Troubleshooting
Mobile
terminal is
jammed,
page 2
Mobile terminal
shutdown after 32
seconds
NO
Measure DBusClk
(9.6 MHz), Data, and
EnX signals. Are
they OK?
YES
Read mobile
terminal info. Is it
OK?
YES
Retest
Page 54
Has the mobile
YES
terminal been
Measure watchdog
signal Cbus. Is it
NO
Reflow or
change UPP.
Measure FBusRx
NO
signal during phone
info read. Is it OK?
Measure FBusTx
signal during mobile
terminal info read. Is
©2005 Nokia Corporation
NO
flashed?
YES
NO
OK?
YES
NO
YES
NO
it OK?
YES
Company Confidential
Nokia Customer Care
Flash the mobile
terminal
Reflow or change
UPP and reflash.
Reflow or change
UEM and reflash.
Reflow or change
UEM.
Reflow or change
UPP.
Reflow or change
UEM.
Issue 2 05/2005