User Guide

NMM-3 Company Confidential
6-Troubleshooting CCS Technical Documentation
Page 6-10 Copyright  2003 Nokia Corporation Issue 1 (11/2003)
Company Confidential
Display Fault
Start
Check X400 and UI
connector X3
contacts and solder
j
oints. OK?
No
Replace
defective part.
Check
continuity of
V
IO and
V
FLASH1, and
Replace TIKU
D300.
Are Display
LEDs
illuminatin
g
Y
es
Measure VIO (1.8V)
and VFLASH1 (2.7V) at
X3. are they OK?
Check for activity on
data, address, and WRX
lines and the RESX line
on power up. OK?
Y
es
No
No
End
Replace display
module. Does the
display now work?
Y
es
Replace display
module.
No
Y
es
No
Illumination
Fault