User Guide

CCS Technical Documentation BB Troubleshooting
Company Confidential NHM-10
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Flashing
faults
Measure
FBUSTX line
during flash
programming is
it 1.8V?
Change
UEM
No
Yes
Check BSI line
Battery connector, flex,
C239, Z383, R384
Yes
Yes
The phone does
not set Flashbus
TXD line high
after startup
The phone does
not set the
flashbus TXD
line low after the
startup
No
Measure BSI
pulse during
flash
programming
Is it ok?
No
Change UPP
WD2
No
Memory
faults page
2
Check connections
Check BB voltages
Check clocks
Change UEM
Yes
Check BSI line
Battery connector,
C226, R220 and R385