Question about Canon PC-940 Black and White Copier

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Canon PC-940 copier

When trying to copy, we end up with copies that have a wide white bar running through the middle. How do I fix this?

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Re: Canon PC-940 copier

Take the toner cartridge out and shake it. Then put it back in and see if it's better.

Posted on Feb 25, 2008

Re: Canon PC-940 copier

Sounds like white out on the scanner. clean all glass and slit glass

Posted on Jan 24, 2008

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I have a Canon PC 940. The copies are coming out with black lines ( 1/2 inch wide ) on the sides of the paper. Do I need to get the copier cleaned? Thank you.

Could be optics needing to be cleaned. First I would rule out the toner cartridge. If you have a spare swap it out or remove your current cartridge, turn it over and slide open the "gate" that covers the drum cyclinder. The drum should be clean all the way across it's surface. If you see toner on each end then that is where your dark sides are coming from. If the drum is clean then most likely you have dust building up on the optics mirrors. One test for this is to manually lighten the exposure control on the operation panel and then recheck your copy quality. This may cause the rest of the copy to be light but if the dark sides goes away then your optics are dirty.
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Canon PC941 Copier: Wide white bar down middle of copies

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Mar 25, 2008 | Canon PC-940 Black and White Copier

2 Answers

Canon PC-940 Copier

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...

Mar 04, 2008 | Canon PC-940 Black and White Copier

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