Question about Canon PC-940 Black and White Copier

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Canon PC-940 Copier

When I copy it leaves "tire tracks" the length of the page only on the back side of the copier! It sounds like the fiber optics are dirty from the test I ran checking whether it was the fuser or fiber optics. Can you explain how I clean the fiber optics and where they are specifically as there is no repair person in my area at all! Thank You, sabinainn@roadrunner.com

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  • sabinainn Mar 12, 2008

    Thanks, I tried all your solutions and it was just I had to replace the drum!!! Now it works great! Thanks again!!!

  • tattoo king May 14, 2008

    copier is showing e64 not copying multiple without shutting down copies are dark and smudging

  • Anonymous Jun 17, 2008

    all

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My Canon 940 copier leaves a 1/2 soft black track on each copied page. I removed the cartridge, opened it up observing a smudge on the red bar approx the same place that is on my copies. How do I clean this? THanks.

Posted on Jun 07, 2008

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There are no fiber optics in the copier. It has 6 mirrors that send the image to the drum unit. Did you try to clean the copyboard glass? Also, do the marks move up and down the page? Also, have you replaced the drum cartridge recently? Pull the drum unit out can you see track marks on the drum it self. If not I would have to say it may be comming from the fixing ass'y, the hot part of the copier. Try to use a dry rag and wipe up any loose toner in the paper path then try to run some blank pages in the copier this may clear up the problem...

Posted on Mar 05, 2008

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What you can try to do to narrow it down, is to make a copy but.. STOP the machine in mid process by turning the power off. This will create a paper jam in the machine. If timed properly, your copy should be 1/2 way through the machine with some image on it. (Make sure that you are trying to copy something on the glass). The copy is not FUSED, so the toner will wipe off so be careful not to rub the page against your clothes/sleeve. IF the black line is on the page at this point, the problem is not in the fuser but probably in the fiber optics. If the problem is in the optics and will need to be cleaned. If the black line is NOT on the page at this point, then the fuser unit is bad and needs to be replaced.
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