Canon imageRUNNER ADVANCE 6075 Series, Service Manual

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Troubleshooting > Image Faults > Uneven density
Troubleshooting > Image Faults > Uneven density
20) Clean the four areas on the removed Duplex Right Roller and the Duplex Outlet Roller
with lint-free paper moistened with alcohol.
21) Install the removed parts in reverse order.
22) Open the Right Door.
23) Open the Right Lower Cover.
24) Clean the entire perimeter of each of the 2 rollers and Registration Front Roller with lint-
free paper moistened with alcohol while rotating the roller by hand.
CAUTION:
When rotating the roller by hand, be sure not to touch the surface of the roller but to
hold a side face.
Registration Front Roller
Roller
F-6-34
F-6-35
Uneven density
[Cause]
Uneven density occurs on the image because of uneven developing performance or change
in drum characteristics due to wear.
[Field Remedy]
Start the field remedy
Adjust height of the Primary Charging Wire
(Set the dark area apart)
Adjust developing bias
COPIER > ADJUST > VCONT > DE-OFST
Enable 2D shading
COPIER > OPTION > IMG-LSR > 2D-SHADE; ON
Execute 2D shading individual correction
Field remedy is complete
YES
YES
YES
NO
NO
NO
Is it straight uneven density?
Is it fixed?
Is it fixed?
F-6-36