Nokia NHM-7 series Service Manual page 140

NHM–7
Troubleshooting Instructions
Display
faults 3
Does the display start ?
Yes
Page 20
Try change UI module
Is it working now ?
No
Check X300
Measure
No
VDD (2.78V) and
VDDI (1.8V).
Is it OK?
Yes
Measure
No
VOUT voltage.
Is it ~8.1V?
Yes
Measure
No
XRES, XCS.
Is it ~1.8 V?
Yes
END
E Nokia Corporation
PAMS Technical Documentation
Yes
No
Check C303
and lines.
Change UEM
Check C302,
X300 and lines.
Check X300
If OK, change
Issue 1 10/2001
Retest
If OK,
and lines.
UPP