Display Faults 2 - Nokia NPL-4 Series Troubleshooting Instructions

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Display faults 2

Display faults
2
Does the display start ?
Yes
END
Copyright © 2005 Nokia Corporation. All rights reserved.
Issue 2 05/05
Company confidential
Try to change
No Display module. Does it
work now ?
Measure VDDI/J301
(2.78V) and VDD/J300
(1.8V).Are
they OK ?
Check signals
RESX/J306,
SDA/J305,SCLK/J307,
CSX/J304.
Are they OK ?
Change X302
Troubleshooting Instructions
Yes
No
No
Yes
No
Yes
NPL-4/5/
Fault in display module.
Retest
Check lines of
VFLASH1 and VIO. If
lines are OK change
UEMEk
Check display control
lines.
If OK change UPP
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