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RH-48
Troubleshooting — BB
CCS Technical Documentation
Page 36
 ©
 2003 Nokia Corporation         Confidential
Issue 1 11/2003
Flash programming doesn‘t work
Flash
faults
The phone does not
set Flashbus TXD
line high after the
startup
Measure BSI pulse during
Flash programming. Is it
OK?
Check BSI line X103,
R202, R206, C100,
C111, C240
Measure FBusRX (2.78V)
signal during flash
programming from
production pattern and
test point J412 (1.8V). Is it
the same?
Reflow or
change UEM
The phone does not
set Flashbus TXD
line low after the line
has been high
Change
UEM
Flash
faults,
page 2
YES
NO
YES
NO
NO
YES
NO
YES
Measure test point
FBusTx (J411) (1.8V) and
production pattern signal
FBusTxO (2.78V) during
flash programming. Are
they the same?
Measure MBus (2.78V) and
test point J410 (1.8V). Are
they the same?
Change UPP
Is there a pulse
on J411?
Is there a pulse
on FBusTx?
Reflow or
change UEM
Reflow or
change UEM
NO
NO
YES
YES
NO
NO
YES