MP7500 SC440

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  • jshah
    Technician

    50+ Posts
    • Aug 2013
    • 50

    [Error Code] MP7500 SC440

    MP7500 displaying SC440, main motor overload error. The machine starts to display the error in output check mode (SP5804-028) as well even if drum unit and transfer units are removed. Transfer waster toner pipe is also clean and spiral rotates freely. drum and transfer belt rotate freely and nothing is stuck.
  • bob marley
    Service Manager

    1,000+ Posts
    • Jan 2012
    • 1339

    #2
    Re: MP7500 SC440

    Originally posted by jshah
    The machine starts to display the error in output check mode (SP5804-028) as well even if drum unit and transfer units are removed. .
    motor driver board is defective
    Live for yourself and you will live in vain. Live for others, and you will live again

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    • slimslob
      Retired

      Site Contributor
      25,000+ Posts
      • May 2013
      • 34849

      #3
      Re: MP7500 SC440

      The waste toner collection unit for the transfer belt unit is also driven by the main motor. There are also gears/idlers that could be binding.

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      • quocve
        Technician
        • May 2012
        • 20

        #4
        Re: MP7500 SC440

        Originally posted by jshah
        MP7500 displaying SC440, main motor overload error. The machine starts to display the error in output check mode (SP5804-028) as well even if drum unit and transfer units are removed. Transfer waster toner pipe is also clean and spiral rotates freely. drum and transfer belt rotate freely and nothing is stuck.


        You try to check its mechanical operation in the back of the machine. I have experienced similar damage due to transmission gear on the back of the machine attached to the motor.

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