C554e Yellow Color Problem

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  • Amrss
    Technician
    • Dec 2020
    • 46
    #1

    C554e Yellow Color Problem

    Hello everyone,
    In our store we have a Konica Minolta C554e machine. Lately, we strated having some issues with the yellow color.
    Any image containing yellow will have a number of horizontal lines.
    We tried changing the drum unit as well as the developer unit, but the problem unfortunately wasn't solved.
    Please check the attached image which contains the result of the Gradation test.
    What could be causing the problem other than the drum and the developer units?
    Attached Files
    Tags: None
    • gerryproulx
      Technician
      • Mar 2015
      • 24
      #2
      did you clean the laser slit glass?

        Comment

        • Amrss
          Technician
          • Dec 2020
          • 46
          #3
          Originally posted by gerryproulx
          did you clean the laser slit glass?
          Yes, I cleaned it thoroughly.

            Comment

            • tsbservice
              Field tech

              Site Contributor
              5,000+ Posts
              • May 2007
              • 7972
              #4
              Originally posted by Amrss
              Hello everyone,
              In our store we have a Konica Minolta C554e machine. Lately, we strated having some issues with the yellow color.
              Any image containing yellow will have a number of horizontal lines.
              We tried changing the drum unit as well as the developer unit, but the problem unfortunately wasn't solved.
              Please check the attached image which contains the result of the Gradation test.
              What could be causing the problem other than the drum and the developer units?
              Make test page at A3 and stop it mid print to see what's the image on ITB looks like. With everything fine with Y drum and Dev you may have bad primary charge(inside belt).

              Let us know.
              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.

                Comment

                • copier tech
                  Field Supervisor

                  5,000+ Posts
                  • Jan 2014
                  • 8132
                  #5
                  You say you cleaned the laser glass but sometimes if the tool is old / worn it doesn't do a good job at cleaning. Shine a torch / flashlight in to visually check the glass is clean.

                  If the device is in a dusty location you may even need to remove the laser to clean internally.

                  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
                  โ€‹
                    ๐Ÿ‘ 6

                    Comment

                    • aberock
                      Trusted Tech

                      Site Contributor
                      100+ Posts
                      • May 2022
                      • 113
                      #6
                      remove laser unit and clean it manually instead of use the sponge tool . may be sponge is old n worn

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