User Guide

RH-37
6(a) - BB Troubleshooting Instructions Nokia Customer Care
Page 24 Nokia Corporation Issue 1 07/04
Display faults 2
Measure
VDD (2.78V)
and VDDI (1.8V).
Is it OK?
Measure
RESX, CSX.
Is it ~1.8V?
Check X2400
and lines. If
OK, change
UPP.
Change UEM
Check X2400
No
Yes
No
Yes
No
Yes
No
Yes
Retest
Display
faults
2
Does
the display
work?
Change
UI module. Is it
working?
End
Open Phoenix, enter Test mode
and goto Testing > Display Test >
Select Test > Contrast Test. Set
the height and width values to 128
respectively.Then click Send to
Phone
Is there a clear
difference on the
Grey scale?
Yes
No