Konica Minolta c6500 weird line on magenta

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  • jorjh
    • Mar 2025
    #1

    Konica Minolta c6500 weird line on magenta

    We have a Konica Minolta c6500 with about 1.4m copies and it recently started printing a weird diagonal line on magenta. Its position on the page is always random. We changed all the imaging units, the developer tanks, the belt and even the laser units and it still appeared after about 1 week. Could it be from the Fiery RIP?

    IMG_0758.jpg
    Tags: None
    • Tech Helpdesk
      Trusted Tech

      100+ Posts
      • Jul 2015
      • 112
      #2
      Re: Konica Minolta c6500 weird line on magenta

      Stop the job before it goes through the fuser and have a look.
      Is the image on the transfer belt and paper ok ?
      If it is then move your attentions to the fuser area.

        Comment

        • blackcat4866
          Master Of The Obvious

          Site Contributor
          10,000+ Posts
          • Jul 2007
          • 22850
          #3
          Re: Konica Minolta c6500 weird line on magenta

          Are you sure it's only affecting magenta? Recently I've seen new batches of paper with a ripple like this. Since the paper isn't flat there isn't much transfer in the valley. It seems to appear every 10 pages in the ream (before it's printed). =^..^=
          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

            • Mick01
              Trusted Tech

              250+ Posts
              • Nov 2012
              • 362
              #4
              Re: Konica Minolta c6500 weird line on magenta

              Hi,
              This can be caused by dust or lint blocking the laser path. The diagonal line sometimes throws techs off (normally it is a staight line). I have seen loose lint caught that gets blown around so it changes where it blocks the laser path (appears as a diagonnal line like this).
              I would thoroughly clean the process unit, also remove the laser units and thoroughly clean the laser cavity. dust inside there will get blown into the process unit giving you continual problems with lines.

              Hope this helps.

                Comment

                • lucky13
                  Trusted Tech

                  100+ Posts
                  • May 2008
                  • 125
                  #5
                  Re: Konica Minolta c6500 weird line on magenta

                  or maybe toner contamination sub hopper full of contaminants

                    Comment

                    • RAI
                      Technician

                      Site Contributor
                      • Feb 2014
                      • 44
                      #6
                      Re: Konica Minolta c6500 weird line on magenta

                      When you say empty the developer tanks are you saying just refreshing the developer material inside the dev? Change the whole dev unit. Possible contamination at the dev mag roller. Contamination will move with internal auger rotation. Also with dev unit removed wipe down area between dev unit and drum for lose hairs and fibres.

                        Comment

                        • jorjh
                          #7
                          Re: Konica Minolta c6500 weird line on magenta

                          Yes, the problem only appears on magenta. The laser units and dev units were also changed from another machine that worked fine. After some more inspecting, the problem is from toner contamination as lucky13 said. Apparently the toner cartridge was refilled from a c8000 one and the person who refilled it used a hacksaw to cut it open :| small plastic particles fell in the toner and ended up in the developer unit. We bothered changing everything inside the machine and didn't think about checking the toner. Hopefully after some thorough cleaning everything will get back to normal. Thank you everyone for your feedback!

                            Comment

                            • blackcat4866
                              Master Of The Obvious

                              Site Contributor
                              10,000+ Posts
                              • Jul 2007
                              • 22850
                              #8
                              Re: Konica Minolta c6500 weird line on magenta

                              What a genius. I wonder if he even considered that the plastic sawdust it about 10x the size of the toner particles.

                              Thanks for posting back. =^..^=
                              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

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