8000i fuser fault after opening door

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  • mntech
    Trusted Tech

    Site Contributor
    250+ Posts
    • Aug 2010
    • 250
    #1

    8000i fuser fault after opening door

    Getting a C6720( fuser ih belt rotation error) every time any of the right side doors are opened and then closed.

    Swapped fuser with known good fuser, checked rotation sensor wire harness in fusers(per bulletin), updated firmware, replaced fuser drive motor assembly, checked connection of YC26 on engine pwb, checked for pinched wires, loose connections.

    Once the error is reset, the machine will boot, and run hundreds of prints, until it jams, once a door is opened to remove jam, closes the door, the fuser faults. Or even while the machine is sitting at ready, if I open the main large door, or either of the 2 lower doors, once closed, faults.

    Also if I press the energy saver button, the machine instantly throws a C6770 (fuser ih low electrical power)

    My next steps will be to replace the fuser ih pwb, then the engine pwb.

    Let me know

    Thanks
    MNTech

    Sent from my SM-G955U using Tapatalk
    Tags: None
    • Has Been
      Technician
      • Nov 2012
      • 48
      #2
      Re: 8000i fuser fault after opening door

      Originally posted by mntech
      Getting a C6720( fuser ih belt rotation error) every time any of the right side doors are opened and then closed.

      Swapped fuser with known good fuser, checked rotation sensor wire harness in fusers(per bulletin), updated firmware, replaced fuser drive motor assembly, checked connection of YC26 on engine pwb, checked for pinched wires, loose connections.

      Once the error is reset, the machine will boot, and run hundreds of prints, until it jams, once a door is opened to remove jam, closes the door, the fuser faults. Or even while the machine is sitting at ready, if I open the main large door, or either of the 2 lower doors, once closed, faults.

      Also if I press the energy saver button, the machine instantly throws a C6770 (fuser ih low electrical power)

      My next steps will be to replace the fuser ih pwb, then the engine pwb.

      Let me know

      Thanks
      MNTech

      Sent from my SM-G955U using Tapatalk
      There is a circuit board on the front of the machine. Check the connectors. I think its called Front PWB

        Comment

        • blackcat4866
          Master Of The Obvious

          Site Contributor
          10,000+ Posts
          • Jul 2007
          • 22999
          #3
          Re: 8000i fuser fault after opening door

          Originally posted by mntech
          ... My next steps will be to replace the fuser ih pwb, then the engine pwb.

          Let me know

          Thanks
          MNTech ...
          Overall, I like your choice.

          I would also meter out all your doorswitches (not just a service mode test, but a real Ohmmeter). =^..^=
          If you'd like a serious answer to your request:
          1) demonstrate that you've read the manual
          2) demonstrate that you made some attempt to fix it.
          3) if you're going to ask about jams include the jam code.
          4) if you're going to ask about an error code include the error code.
          5) You are the person onsite. Only you can make observations.

          blackcat: Master Of The Obvious =^..^=

            Comment

            • Santander
              Senior Tech

              Site Contributor
              500+ Posts
              • May 2009
              • 768
              #4
              Re: 8000i fuser fault after opening door

              Originally posted by mntech
              Getting a C6720( fuser ih belt rotation error) every time any of the right side doors are opened and then closed.

              Swapped fuser with known good fuser, checked rotation sensor wire harness in fusers(per bulletin), updated firmware, replaced fuser drive motor assembly, checked connection of YC26 on engine pwb, checked for pinched wires, loose connections.

              Once the error is reset, the machine will boot, and run hundreds of prints, until it jams, once a door is opened to remove jam, closes the door, the fuser faults. Or even while the machine is sitting at ready, if I open the main large door, or either of the 2 lower doors, once closed, faults.

              Also if I press the energy saver button, the machine instantly throws a C6770 (fuser ih low electrical power)

              My next steps will be to replace the fuser ih pwb, then the engine pwb.

              Let me know

              Thanks
              MNTech

              Sent from my SM-G955U using Tapatalk
              Your next step replacements are logical. The C6770 code when going into energy saver mode however would direct me to the engine board.

                Comment

                • mntech
                  Trusted Tech

                  Site Contributor
                  250+ Posts
                  • Aug 2010
                  • 250
                  #5
                  Re: 8000i fuser fault after opening door

                  Fuser IH PWB replacement resolved both issues. Thanks

                  Sent from my SM-G955U using Tapatalk

                    Comment

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