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CCS Technical Documentation
Blank Display (2)
Start phone with
Start phone again with
display flex connected
and retest.
62
Continues from
blank display
troubleshooting
page1
display flex
disconnected.
Measure
X4423 pins #9
#10 #11 with
oscilloscope
No toggling
Replace
Z4421 EMI
filter.
No
Display
working?
oscilloscope
Yes
filter. Display
End
COMPANY CONFIDENTIAL
Copyright © 2004 Nokia. All Rights Reserved.
Toggling
Pins are display data
lines. There should be
data toggling if phone
is working ok
Measure
X4423 pins
#15 and
#30 w ith
No toggling
Replace
Z4422 and
Reflash phone.
Z4423 EMI
No
Display
working?
working?
Yes
Yes
RM-12
Toggling
Change X4423
display connector
End
Goto OMAP
troubleshooting
Issue 1 11/2004
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Table of Contents
Troubleshooting
