Nokia 6610 - Display Fault

NHL-4/4U Company confidential
Troubleshooting Instructions CCS Technical Documentation
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Start
Does the display
start?
Try to change
UI-module. Is
the display
working now?
Retest failing
UI-module
Check X302
(solder joints). Is
it OK?
Change X302
Illumination
fault
Measure VDD (2.7V)
and VDDI (1.8V). Are
they OK?
No
No
Yes
Measure RESX(J306)
and CSX (J304)
signals. Are voltage
levels ~1.8V??
Yes
Measure SDA (J305)
and SCLK (J307)
signals. Are voltage
levels ~1.8V?
Yes
End
Yes
No
Check X302 and
lines again. If OK,
change UPP
No
Check X302 and
lines again. If OK,
change UEM
No
Check X302,
R308,R309 and
lines. If OK,
change UPP.
No
Are the display LED’s
working when key is
pressed or enabled by
Phoenix SW?
Yes
No
Yes