Nokia 6610 Troubleshooting Instructions page 33

CCS Technical Documentation
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Start
Are the display
No
LED's working?
Yes
Are the
No
keyboard LED's
working?
Yes
End
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Try to change display.
Are the LED's working
now?
No
Check X302 (solder
joints). Is it OK?
Yes
Measure VLED+ and VLED-.
VLED+ = ~7.5V and VLED-
= ~0.5V when LED driver is
enabled. Are they OK?
(Notice: VLED+=VBATT
when driver is disabled)
Try to change UI PWB.
Are the LED's working
now?
No
Check X301 (solder
joints). Is it OK?
Yes
Measure VLED+. VLED+ =
~7.5V when LED driver is
enabled. Is it OK?
Yes
Check all LED's in UI PWB
(V101 - V106). Are they OK?
Yes
Retest
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Troubleshooting Instructions
Yes Retest failing display
No
Change X302
Check N300, L300, V300, R300,C303,C304.
No
If not OK, change defect part.
Yes Retest failing UI PWB
No
Change X301
Check N300, L300, V300, R300,C303,C304.
No
If not OK, change defect part.
No
Change defect parts
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