Question about Canon CFX-L4000 Plain Paper Laser Fax

4 Answers

"always getting check paper size"

I have canon fax cfx-L4000 during receiving is only one page printed then showing check paper size alarm, i pulled out the paper tray, insert again then print one page after that showing again check paper size, do you have any suggest for me what the problem so that i can fix myself, thanks a lot for the help.

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  • robert00 Dec 10, 2007

    There's no problem on the setting, i'm using letter paper size so that i set on "LTR" but still getting alarm its showing check paper size even though the setting is correct. My suspect is sensor switch i seen two from down and at the back between two with rubber black roller but im sure is that. Do you have anymore advise for me? Thanks and thank you very much for the response.

  • robert00 Dec 10, 2007

    Thank you very much for immediate response, i will see it first maybe is out of place or if not i will try to change the sensor. I will do it now and i will be inform you later.

  • robert00 Dec 12, 2007

    I change the sensors both up and down but still exist since sometime it is ok, i tried also set all sizes of the paper setting but i failed. There is another way to solve this problem? Thanks again for the help.

  • robert00 Dec 12, 2007

    You r right im here.I think is need to be reset but i dont't know how to do reset this fax machine but i have user's manual only, if you don't mind give me a chance or guide on how to do it, i can do it myself.

    Before, it is! im using A4 size and then i tried to use now again it's ok no problem, but when i switch on to used Letter size i can't most of the time check paper size but im using almost a year only just now has i got the problem. I'm trying to solve this problem but i need somebody to help.

    Thanks a lot - checkitright..

  • metrobus Mar 19, 2008

    Prints fine, then says check paper size and error lights up and makes the error tone. You can pull the paper tray out and push back in to reset. Try and copy another sheet same thing happens. Have already swapped out paper feed rollers and separation pad, checked paper size internally made sure on letter and paper exit sensor appear to be operating fine. Any suggestions????



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I just fixed same problem on my LaserBase MF5730 device when printing PDF file of not standard (A4) size.
Make sure that "Choose paper source by PDF page size" is unselected in your printing settings dialog.

Posted on Sep 27, 2010


I did even the setting is correct, i'm using a letter LTR paper size but its always getting show check paper size after printed one page. I was suspected the sensor switch from down before passing way to the pickup roller but i'm not sure if is it, do you have any more advise? Thanks a lot!
Thank you very much for the response

Posted on Dec 10, 2007


The sensor flag at the rear paper path sensor is worn down too short. i have seen this many times

Posted on Jun 04, 2008

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The paper size you are using is incorrect.
1- when you take out the tray is the the paper snug in the tray? is the paper adjuster set to LETTER, is there a switch for custom and letter? is it set to letter?is it set to letter in the menu?

Posted on Dec 10, 2007

  • CheckitRight
    CheckitRight Dec 10, 2007

    here is how to check the sensor :

    change to legal size does it register as legal ? if no then the sensor is out of place or bad.

  • CheckitRight
    CheckitRight Dec 12, 2007

    I saw that you are in Europe, is that correct?

    to my understanding they use a different type of paper, they use A4 size which is a smaller size than Letter.

    If you are using Letter size, my suggestion is to try and reset the machine and start over with the settings. ( if you have the manual)

    Did you try to change the size of the paper? did it register the different size?


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