Display Problem - Nokia NHM-1 Series Troubleshooting Instructions

CCS Technical Documentation

Display problem

Start
Does the display
start?
Yes
End
Issue 1 11/03
Try to change
Display/ UI-module.
No
Is the display
working now?
No
Check X100, X101,X166
(soldel joints)
Are They OK
Yes
Measure VDD (2.7V)
and VDDI (1.8V). Are
they OK?
Yes
Measure LCD Sync,
A0, D0-D7, RD, WR
And XRES signals
Are voltage levels
1.8V
Yes
Are the display
LED´s working
when key
pressed or
enabled by
Phoenix
Nokia Corporation.
Troubleshooting instructions
Retest failing
Yes
module
No
repair fault
Check X100, X101,
X166(from UI module)
No
and lines again. If Ok
change UEM
Check X101,
X100, X166 and
No
lines again if OK
Change TIKU
Illumination
fault
No
NHM-1
Page 47