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  1. #1
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    Canon MF5940DN with E744-4000

    Hello i have Canon MF5940DN with rotating 180 message and error E744-4000. I read about this
    Turn OFF and then ON the main power.
    Check the Engine Controller PCB.
    Install the Engine Controller PCB.
    Install the set of the controller firmware.
    Check the model code. (When the model code and the engine code are mismatched, E744-4000 occurs.)

    But i don't have any PCB for change.
    I found something like service mode
    Press 02 - than i can navigate to system mode and can choose firmware update. But i can't found how i make left or right movement in this menu. Myay be anybody know how ?

    Thanks for answer.

  2. #2
    Service Manager 10,000+ Posts
    Canon MF5940DN with E744-4000

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  3. #3
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    Re: Canon MF5940DN with E744-4000

    Thanks for answer. Device can't see any USB connection, but work in network mode. For update software it can be in downloading mode - i can't do it.
    I found something like service mode
    Press 02 - than i can navigate to system mode and can choose firmware update. But i can't found how i make left or right movement in this menu. Myay be anybody know how ?

  4. #4
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    Re: Canon MF5940DN with E744-4000

    Another question - how to enter service mode on this printer?

  5. #5
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    Re: Canon MF5940DN with E744-4000

    Same problem, I stuck on push left or right movement in this menu. Any suggestion?

  6. #6
    razvezlo
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    Re: Canon MF5940DN with E744-4000

    Quote Originally Posted by devilbpm View Post
    Same problem, I stuck on push left or right movement in this menu. Any suggestion?
    same problem.

    desold the chip, reprogram it with new dump and sold it back. That's te only way I was able to found upon my researches.

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