Question about Canon PC-940 Black and White Copier

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Black streaks on copies canon pc940 - Canon PC-940 Black and White Copier

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 168 Answers

SOURCE: PC940 dark lines across the middle of the page

Either the Fuser/Heating unit is bad, or the optics are dirty.
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.
Let me know how the copy comes out when you stop the machine in midway and I can see if i can give you any more suggestions.
Good luck.
Mac

Posted on Feb 13, 2008

  • 14 Answers

SOURCE: Canon PC940 Problem

You could have a broken exposure lamp. Does the scan bar light up when you make a copy? If not that is the problem. You might also ck the contacts on the machine where they touch the toner cartridge. The toner cartridge opens a shutter to the drum when you slid it into the machine and that may be broken.

Posted on Feb 13, 2008

  • 990 Answers

SOURCE: canon pc940 won't turn on

power fuse blown on power supply board ,replace it.

Posted on Dec 10, 2008

Cogz
  • 1326 Answers

SOURCE: Canon PC940 Ticking noise when copying and regestration is off

The waste toner is in the drum unit it's self. If it full you may as well replace the drum unit all togather. Once it is full the drum is just about shoot. If the regestration is off, you may have a problem withe reg. feed clutch. Dose it show up with the paper tray and the manual feed try?

Posted on Feb 08, 2009

  • 1294 Answers

SOURCE: I have a black solid streak on my Canon D320 copies.

Change the OPC drum cleaning blade and clean used the vacuum cleaner the development station.

Posted on Dec 02, 2009

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What causes a white streak and faded print to appear on copies?


Most often on the PC940 this means your toner cartridge is getting low on toner. To prove this is the cause, just remove the toner cartridge and while keeping it relatively level, shake it side to side a few times. This will re-distribute the remaining toner in the cartridge. Re-install and make a copy. The black streak/faded copy should be much better. If so then I would go ahead and get a new cartridge on the way.
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Just installed a new cartridge. Made one copy. worked great.
Went to make a copy today. All Black. Thought about it. Tried again and noticed lamp was not lighting. Before you say DUH! is the lamp out or is their extenuating circumstances preventing the lamp from lighting during a copy. The table top moves and everything else seems to work accordingly.

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try turning the machine off and then on...you either had a power surge and it freaked out your machine or the fuser is shot...

Dec 17, 2009 | Canon PC-940 Black and White Copier

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power fuse blown on power supply board ,replace it.

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1 Answer

Canon PC940 Ticking noise when copying and regestration is off


The waste toner is in the drum unit it's self. If it full you may as well replace the drum unit all togather. Once it is full the drum is just about shoot. If the regestration is off, you may have a problem withe reg. feed clutch. Dose it show up with the paper tray and the manual feed try?

Nov 15, 2008 | Canon PC-940 Black and White Copier

1 Answer

PC940 dark lines across the middle of the page


Either the Fuser/Heating unit is bad, or the optics are dirty.
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.
Let me know how the copy comes out when you stop the machine in midway and I can see if i can give you any more suggestions.
Good luck.
Mac

Feb 12, 2008 | Canon PC-940 Black and White Copier

1 Answer

Canon PC940 Problem


You could have a broken exposure lamp. Does the scan bar light up when you make a copy? If not that is the problem. You might also ck the contacts on the machine where they touch the toner cartridge. The toner cartridge opens a shutter to the drum when you slid it into the machine and that may be broken.

Feb 11, 2008 | Canon PC-940 Black and White Copier

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