Question about Canon PC-940 Black and White Copier

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The copies come out with a black smudges on them

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This can be one of several problems -
Dirt on the glass - (or inside)
Dirt on mirrors.
Failing ioniser or HT circuit
Failing or dirty electrostatic roller.
Failing toner scraper blade
Damp paper
Dirty heated (fuser) rollers (most common failure)

Most items that are likely to fail should be easy to get to - so remove and clean these first - then check again.

If you want a run-through of the basic mechanism involved - try here to help understand the process,

Posted on Oct 02, 2009

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1 Answer

Leaves black marks on copies


It could be leaking toner from the recovery area that sis on top of the dum, it removes any toner that was not transfered to the paper. You would have to remove it and empty out the toner.

Dec 11, 2012 | Toshiba e-Studio 232 Black and White...

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I have a Canon Imagerunner 1023if and have black smudges along the left edge of paper, both copies and printed directly from computer.


this is possibly a problem in the fuseing part of your machine, where the paper heats up at the back, the fuser roller could be worn out. and your toner could be sticking to it.

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Black smudge across bottom of page


clean d parer feed rollers if not repaired then clean d pcu

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I'm getting black smudge marks on copies. After


I also had this issue, waste tone was comming from the transfer belt, had a good clean out been good for months now.

Aug 11, 2009 | Samsung CLP 300 Laser Printer

1 Answer

Smudges on paper and then when it does copy, ink is light.


hi,check copy cartridge or clean corotron wire.try to increase toner.send me result.
thank you.

May 25, 2009 | Sharp AR-5320 Black and White Copier

1 Answer

Smudges on paper and ink is light when it does copy correctly.


It sounds like your drum unit needs to be replaced. Do the smudges look characteristically like a finger print? Technicians have a rule of thumb. Replace your drum, developer compound and general service the machine as often as you service your car. Assuming you do service your car as often as I do, it should be after every 25,000 copies. If the machine has never been serviced then its time you did.

May 25, 2009 | Sharp AR-5320 Black and White Copier

2 Answers

Lexmark C522 color printer has black smudges on copies.


It's more than likely a scratch on the photoconductor unit. I had to replace one last week. If you have a spare, try to replace it to confirm.

Mar 13, 2009 | Lexmark C522n Laser Printer

1 Answer

THE COPIES COME OUT ALL SMUDGED WITH INK WHAT'S WRONG.


Hello

in your printer fuser has went bad, just replace toner if its almost empy and fuser and that will take care of it.

Thankyou

May 15, 2008 | Toshiba 1370 Black and White Copier

1 Answer

Black smudges across sides of 81/2 x 11 paper


The optics may be dirty or you could have a bad drum cleaning blade.

Feb 13, 2008 | Office Equipment & Supplies

1 Answer

PC-65 (Canon copier)


A smudge across the copy can be in many different areas.
Some ideas.
The drum cleaner may be the problem as you indicate.
It may be a piece of paper ripped of dragging across the surface of the paper causing the smudge.
Also the fuser roll coating may be very worn and causing that.
One thing to try that can show you if the defect is on the drum cartridge, is start to run a copy, After the paper feeds and this is timing, shut the machine off when you think the paper should be about half way through the copy cycle, then see if the copy defect is on the unfused page, If it is smeared before it reaches the fuser, it is in the cleaning section, if it is not smudged, then it is most likely the fuser rollers are needing replaced.
First look for a paper fragment in the path, step 2 is to shut the machine down in mid copy and see if the defect is there.
The fuser is the hot area of the machine in the exit area, If you can take a flash light and look in there and see if you observe wear or heavy toner buildup on a roller then obviously thats the problem.

Jan 02, 2008 | Canon C130F Black and White Copier

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