Nokia NSB-9 Service Manual page 245

CCS Technical Documentation
Display
faults 2
Does the display
start?
Yes
Issue 1 04/03
Try to chance the
No
display module. Is it
working now?
Check X300
Measure
VDD (2.78V) and
VDDI (1.8V).
Are they OK?
Yes
Measure XRES,
XCS, SI. Are
voltage levels
~1.8V?
Yes
END
Nokia Corporation
Troubleshooting Instructions
Yes
No
Check C305, C306
No
and lines. If OK,
change UEM.
Check X300 and
No
lines.
If OK, change UPP.
NSB-9
Retest
Page 71