KM Bizhub C353 yellow vertical lines on Color Copy

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  • paxnom
    • Jul 2025
    #1

    KM Bizhub C353 yellow vertical lines on Color Copy

    Problem with yellow vertical lines on color copy (as per attachment) or similar black lines on black copy. Have switched (from a fully functional KM C353) PCB, drum units, toner, transfer belt etc. with no change. Put components from error machine in other machine and copy is perfect. If you print a single color magenta / cyan the yellow lines still appear on copy. black copy has black lines. The gap areas are yellow lines that extend across the copy. There are no error messages. Totally stumped.

    KM C353 copy.JPG

    I doubt if its the transfer belt drive as no error message occurs. Ditto waste toner drive -
    Last edited by Guest; 01-31-2017, 01:30 AM. Reason: ad jpeg
    Tags: None
    • blackcat4866
      Master Of The Obvious

      Site Contributor
      10,000+ Posts
      • Jul 2007
      • 23008
      #2
      Re: KM Bizhub C353 yellow vertical lines on Color Copy

      Which attachment? =^..^=
      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

        • paxnom
          #3
          Re: KM Bizhub C353 yellow vertical lines on Color Copy

          Originally posted by blackcat4866
          Which attachment? =^..^=

          KM C353 copy.JPG

            Comment

            • blackcat4866
              Master Of The Obvious

              Site Contributor
              10,000+ Posts
              • Jul 2007
              • 23008
              #4
              Re: KM Bizhub C353 yellow vertical lines on Color Copy

              I think I would look at primary transfer belt drive, and transfer waste drive. =^..^=
              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

                • paxnom
                  #5
                  Re: KM Bizhub C353 yellow vertical lines on Color Copy

                  Are you talking the transfer belt drive on machine or on transfer belt assemblyy?? I switched transfer assy units from good working machine C353. Why only yellow and black lines - not cyan / magenta?? Attached is the blank black copy

                  KM C353 Black.JPG
                  Last edited by Guest; 01-31-2017, 01:42 AM. Reason: add jpeg black

                    Comment

                    • blackcat4866
                      Master Of The Obvious

                      Site Contributor
                      10,000+ Posts
                      • Jul 2007
                      • 23008
                      #6
                      Re: KM Bizhub C353 yellow vertical lines on Color Copy

                      Originally posted by paxnom
                      Are you talking the transfer belt drive on machine or on transfer belt assemblyy?? I switched transfer assy units from good working machine C353. Why only yellow and black lines - not cyan / magenta?? Attached is the blank black copy

                      [ATTACH=CONFIG]35409[/ATTACH]

                      Well... if all the colors show the voids it must be primary transfer or later. Those "yellow " lines don't look very yellow in the pix. They just look like voids. And if you already swapped out the primary transfer belt assembly, I guess that leaves the drive portion in the main body of the machine.
                      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

                        • copyman
                          Owner / Technician

                          Site Contributor
                          2,500+ Posts
                          • Sep 2005
                          • 4700
                          #7
                          Re: KM Bizhub C353 yellow vertical lines on Color Copy

                          I really can't see the yellow in sample but if that is color showing then I would re-look at something with the yellow IU or print head.

                            Comment

                            • Desert Rat
                              Service Manager

                              Site Contributor
                              1,000+ Posts
                              • May 2008
                              • 1089
                              #8
                              Re: KM Bizhub C353 yellow vertical lines on Color Copy

                              I think I would be inclined to look for something common to the black and yellow.
                              May be a bad or intermittent ground to the drum/dv unit.

                              Do these lines appear in the erased margins? Measure the voltage between the ground and the neutral lines.
                              It should read less than 1vac. It kind of reminds me of noise on the ground line.

                              I would try something odd, like put a piece of black tape over the black printhead laser and see if the same
                              pattern is printed for a blank copy.

                              I'm not sure, give us another hint.

                              DR

                                Comment

                                • ramakrishna j
                                  Junior Member
                                  • Jan 2017
                                  • 5
                                  #9
                                  Re: KM Bizhub C353 yellow vertical lines on Color Copy

                                  Originally posted by paxnom
                                  [ATTACH=CONFIG]35407[/ATTACH]
                                  some of the corona unit is problem. clean all corona units and try.

                                    Comment

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