User Guide

CCS Technical Documentation Baseband Troubleshooting Instructions
Issue 1 10/02 ¤Nokia Corporation Page 53
Display
faults 3
Does the display start?
Change UI module.
Is it working now?
No
Retest
Yes
Measure
V
DD (2.78 V) and
VDDI (1.8 V).
Are they OK?
Check C303
and lines.
If OK ->
change UEM.
No
Measure
VOUT voltage.
Is it ~ 8.1 V?
Yes
Check C302,
X
300, and lines.
No
Measure
XRES and XCS.
Are they ~ 1.8 V?
Yes
Check X300
and lines.
If OK ->
change UPP.
No
END
Yes
Yes
Check X300
No