Question about Canon PC-940 Black and White Copier

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Thin vertical line on copies

A thin, vertical line appears on the copies across the entire page, approximately 1 inch from the right margin. What is causing this problem and how can it be fixed?

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  • Tara Latimer
    Tara Latimer Mar 26, 2014

    This is an "old" PC-940; it is a stand-alone copier, not connected to the computer, and therefore no "clean and alignment" functions from any "tool menu" are available." Do you have any other suggestion to fix the problem?

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Tara, if the ink levels are ok, try clean and allignment functions from the tool menu. Use CLEAN UNUSED PAPER.

Posted on Mar 24, 2014

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Posted on Jan 02, 2017

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SOURCE: thin black lines (mp 530)

Here's the link for how to clean the unit... I was going to post the instructions here, but there are pictures that might be helpful to you.

http://www.usa.canon.com/consumer/controller?act=ModelInfoAct&tabact=SupportDetailTabAct&fcategoryid=238&modelid=13371

Before doing anything more drastic, I would try this.. let us know how it turns out.. if it doesn't work, we'll go from there.

Maggie B

Posted on Feb 23, 2008

  • 1 Answer

SOURCE: Vertical Line on copies made from automatic feeder

i just used some dust off spray air on the ADF everywhere that there is an opening to spray. it appears to have helped some...its not perfect yet. hope this helps.

Posted on Nov 09, 2007

  • 1 Answer

SOURCE: Copying with page feed results in a vertical line on every page

There must be a strip of glass about one inch wide, next to
the large glass. There is the problem !
Clean that strip thourougly. When you use the feeder the pages
are scanned thru the small strip of glass.

Posted on Mar 28, 2008

leroyal
  • 2120 Answers

SOURCE: Unwanted "line" on copied documents

Open the document feeder and clean the scanner glass.

Posted on Jan 21, 2009

Cogz
  • 1326 Answers

SOURCE: 3 thin black lines on copy

Do the black lines show up when you use the adf or if you make a copy from the copyboard glass. If the lines only show with the adf > there is a small **** of glass on the left side of the copy board glass > I would clean the slip glass with windex or a damp cloth..... Good Luck

Posted on Jun 09, 2010

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