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e-STUDIO350/352/353/450/452/453
TROUBLESHOOTING
5 - 121
5
13) Black banding (at right angles to feeding direction)
Defective area
Step
Check items
Prescription
Main charge wire
1
Is the charger wire dirty or
deformed?
Clean or replace the charger wire.
Fuser unit
2
Are the fuser roller, separation finger
and thermistor dirty?
Clean them.
3
Has the cleaning roller for the pres-
sure roller reached its PM life?
Replace it.
High-voltage trans-
former
(Main charger /
Developer bias /
Transfer charger)
4
Is the high-voltage transformer out-
put defective?
Adjust the output, or replace the trans-
former.
Drum
5
Is there a deep scratch on the drum
surface?
Replace the drum if the scratch has
reached the aluminum base.
6
Is there thin scratch (drum pitting)
on the drum surface?
Check and adjust the contact condition of
the cleaning blade and recovery blade.
Scanner
7
Is there a foreign matter on the car-
riage rail?
Remove the foreign matter.
Feeding direction