ricoh mpc 4504 ex 312-01

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  • mrgene
    Technician

    50+ Posts
    • Dec 2009
    • 53
    #1

    ricoh mpc 4504 ex 312-01

    the machine only codes when doing two sided black and white works fine on two side color and will run black and white all day long single sided. I have replaced the black pcu (twice) and also replaced the transfer belt, and did a firmware update. Any clue ???
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    • copier tech
      Field Supervisor

      5,000+ Posts
      • Jan 2014
      • 8119
      #2
      Since you replaced the K PCU maybe an issue with the HV or IOB.
      • [B]

      Let us eat, drink, and be merry, because tomorrow we may die!

      For all your firmware & service manual needs please visit us at:

      www.copierfirmware.co.uk - www.printerfirmware.co.uk
      ​
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        • luca72
          Field Supervisor

          1,000+ Posts
          • Oct 2017
          • 1708
          #3
          Originally posted by mrgene
          the machine only codes when doing two sided black and white works fine on two side color and will run black and white all day long single sided. I have replaced the black pcu (twice) and also replaced the transfer belt, and did a firmware update. Any clue ???
          try if this is your case.
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          "loneliness is an invention of the white man, when we are alone we talk to everything around us, we are never alone" (Ojibwa)
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            • slimslob
              Retired

              Site Contributor
              25,000+ Posts
              • May 2013
              • 37047
              #4
              Originally posted by mrgene
              the machine only codes when doing two sided black and white works fine on two side color and will run black and white all day long single sided. I have replaced the black pcu (twice) and also replaced the transfer belt, and did a firmware update. Any clue ???
              The only difference that I can think of would be vibration from the duplex unit affecting a loose connection to the K high voltage.
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