Question about Canon PIXMA MP780 All-In-One InkJet Printer

3 Answers

Clear Paper Jam error -- but there is no paper jam!

I now have an error message on the LCD of my Pixma MP780 that says "Clear Paper Jam - Press [OK]" but there is no paper jam to be found anywhere. The print status monitor says the jam is in the transport unit at the rear of the printer. But again, there is no Jam.

Posted by Matt Schenck on

  • 13 more comments 
  • nicetry Dec 01, 2007

    Same as already described; possible added factor, it happened immediately after successfully printing with photo paper and switching back to "reg" inkjet paper.

  • Anonymous Dec 08, 2007

    i have clear pepap jam error i show press ok

  • painterh Dec 12, 2007

    I too am having same problem with "clear paper jam" error when this not any paper in machine. It also seems that the carriage with the printheads and cartridges is not centering when lid is opened as it used to.

  • Anonymous Dec 17, 2007

    i have a brother hl-1660e printer and it is giving me an rear paper jam but there is no paper jam

  • Anonymous Dec 20, 2007

    I have precisely the same problem with my PIXMA MP780 ie "eror #357, clear paper jam" but there never was one; and I also feel the print carriage no longer moves the way it should.

  • Anonymous Dec 21, 2007

    LCD says there is a paper jam and there is no paper jam...

  • thinker1 Feb 03, 2008

    I receive the message from the computer:

    "Paper is jammed in the paper ejection slot." and on the printer: "Clear paper jam and then print ok"

    There is no paper anywhere in the printer.

    I've carried out all the inspections and sucked air through the ejection spot but still not work.

  • Anonymous Jun 27, 2008

    my printer says that i have to clear a paper jam but there is no paper jam!

    What is the problem and what can i do about it? I've tried to open it and see if there was a paer jam but there wasnt anything.

  • myuglyfrog Sep 02, 2008

    Same problem as described. The Alarm light keeps blinking even after I press OK to fix the jam.

  • Bobel Mar 01, 2009

    Does Canon have a fix for this Problem??

  • ptorella Apr 13, 2009

    The printer screen says there is a paper jam but I have checked the tray and the feeder and there is no paper jam anywhere.

  • Anonymous Mar 21, 2014

    false paper jam error will not clear

  • Anonymous Mar 30, 2014

    I just recently got this printer and there were no directions how to operate it. Now I cannot figure out how to clear a paper jam. I am trying to delete something about print abrasion that keeps coming up in a message on my computer.

  • Anonymous Mar 30, 2014

    I am attempting to respond to a recurring message on my computer about deleting print abrasion; now I need to clear a paper jam. Also can you explain the message about print abrasion?

  • Anonymous Mar 30, 2014

    error-message paper problem when I go to print something after a paper jam is cleared



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Sometimes while clearing the jam (if there was one) you may leave a bit of paper left behind which obscures a sensor causing it to think there is paper still in the paper path, or sometimes even paper dust can do it. Try a bottle of compressed air and blow the path out very well. Get a bright light (good flashlight) and very throroughly eyeball the paper path for any "foreign" objects...

Posted on May 31, 2007

  • Anonymous May 31, 2007

    Most of the sensors are either a microswitch, or more commonly a light sensor (LED and photocell) which can easily become obscured or dirty with even a tiny bit of crud!




I had the same problem with Canon Pixma MX310. Tried turning it on and off, checked for paper bits, etc. I finally cleared it by:
1-Turning off and unplugging cable to PC.
2-Sliding cartridges to left and popping them out and popping them back in.
3-Turned it back on and error was gone and printer worked perfectly.

Posted on Jan 24, 2008

  • Yolanda Finlay Jun 18, 2013

    I tried doing that but still saying paper jam, I dont know what else to do thank you



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Canon Mp780 error code 6A00

6A00 is not a jam error, it is an error of the purge assembly not cycling properly. Many times a paper scrap jammed in the capping assembly or the squeegee assembly caught on the filter assembly. Usually worn out gears and dried ink so that replacement of the purge assembly is the best fix.

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Error message 6A00


The 6A00 is a Canon generic code for paper path jam.

Solution 1:
Move the printhead carriage back and forth a few times.

Solution 2:
Check the purge unit: Moving the print head assembly will not clear a purge unit if its jammed with paper, paper clips, push pins, screws, cookie crisp, flower bud pods or the like.

Solution 3:
Press the ink pads down in the purge unit.
Please come back and just gave a vote, it will gave me some satisfaction to know am helping some one so I will keep on helping.
All The Best: Pineworks

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Pixma MP780 paper jam

Sandra, on the feed swich which way is the arrow pointing to the front feeder? or to the back feeder? Get a bright flashlight and inspect the back very carefuly. I had the same problem and found a label off of a shirt inside, don't ask me how it got there I havent a clue. But it did fix the problem. You can also try turning it on and off a few times.

If the arrow is pointing to the front paper feeder then the jam is in the front, if it is pointing to the rear that is where there is a problem. Hope this will help. Leo

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LCD Error message: Paper output slot. Thye paper is jammed. clear the paper and press OK.

A jam sensor may be stuck or have something stuck on it, causing the machine to think it is jammed. These sensors are normally located where the paper feeds into the printer, and where the paper exits the printer. Try forcing a sheet of paper through the machine in the direction paper normally. feeds. This may free up the jam sensors.

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