Question about Canon imageCLASS D780 All-In-One Laser Printer

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Copier print quality

We use a Canon ImageClass D780 copier. Lately when we use the ADF, there is a distinct black line all the way down the page. I have cleaned everything I can clean on the copier, and still the line persists. Is there anything I can do short of bringing in a serviceman?

Posted by gophergil on

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Eric Engel

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Take a credit card and scrape the glass clean.  You only need to clean along the right side of the glass where the paper passes through.  Dirt that you can't even see will cause the lines.

Posted on Oct 27, 2007

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Here you go.
1. Put a paper on the glass don't use the ADF see if you printed copy has a black line on it.

If you do not have a black line on it, do the following.

Lift up the ADF tray go in to additional functions #6 Adjust/Clean and then #2 clean the ADF feeder.

The roller is in the top of the ADF feeder at the right and is white in color. When you press the (set) button you will see it spin.

Also clean the glass you have some whiteout on it. (Look at the glass real good when cleaning it).
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TRY A CLEANING OF THE ROLLERS ETC.
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Clean the platen glass and make sure the isn't any debris or ink on it, especially by the roller. If you make a copy thru the ADF while the ink is still wet it will deposit on the glass.
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