User Guide

CCS Technical Documentation Troubleshooting Instructions
Company confidential NHL-4/4U
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Start
Is the FBUS
TX-line HIGH
after startup?
Measure BSI-pulse
during Flash
operation. Is it OK?
Measure FBUSTX-line
during Flash operation
(J411). Is it ~1.8V?.
Check R104.
If OK, change UEM
Yes
End (retest)
No
No
Is FBUSTX-line
set to LOW after
it has been
HIGH?
Yes
Yes
Check BSI-line including
X100,C100,C240,R202
and R206.
No
Wrong
manufactor ID
and device ID
Is phone totally
dead?
No
No
Change UPP
Yes
No
Change Flash
Yes
Phone is dead
Phone is
jammed
Phone doesn’t
start up or it’s
jammed?
Yes
Yes
No