C284 horizontal rainbow-bars on color prints at fixed position

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  • Yamimoto
    Junior Member
    • Jan 2025
    • 4
    #1

    C284 horizontal rainbow-bars on color prints at fixed position

    Hi, I am looking for help with my C284. BW-prints are ok, but on color-prints rainbow-colored bars
    appear at two postions on the page. See the attached image. The transfer belt is recently changed
    with the OEM product. Toner are BK,Y OEM and C,M compatible products I think.
    The bars look somewhat like printed and not like smear or exessive toner to me.
    Thanks in advance for any help

    stripes.jpg

    Attached Files
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    • kingarthur
      Service Manager

      1,000+ Posts
      • Feb 2008
      • 1339
      #2
      That looks like the calibration pattern that the device puts on to the transfer belt, - it's not being cleaned off
      Tip for the day; Treat every problem as your dog would.....If you cant eat it or f*ck it....then p*ss on it & walk away...
        👍 1

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        • Brad6784
          Technician

          Site Contributor
          50+ Posts
          • Mar 2015
          • 75
          #3
          Yes transfer belt, with new blade (can get you up and running for now) or new belt unit.

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            • tsbservice
              Field tech

              Site Contributor
              5,000+ Posts
              • May 2007
              • 8000
              #4
              Better throw compats or they will destroy your devs(way more expensive). And I don't think cleaning blade will help in this situation, at least not for long.
              A tree is known by its fruit, a man by his deeds. A good deed is never lost, he who sows courtesy, reaps friendship, and he who plants kindness gathers love.
              Blessed are they who can laugh at themselves, for they shall never cease to be amused.
                👍 1

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                • Yamimoto
                  Junior Member
                  • Jan 2025
                  • 4
                  #5
                  I took apart the cleaning end of the transfer belt to inspect the blade. What i found
                  were two sections with dammed up toner in the waste conveyor. I cleaned the cleaning
                  blade with a soft brush and removed all the toner from the conveyor unit beneath.
                  The printing results are perfect for the moment. No more color bars or other artefacts.
                  Now I will wait if this is a temporary victory.

                  Thanks for all your expert answers leading me to the cleaning blade.
                    👍 1

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