Strange Gaps in Images with Specific Colors on MX-C311

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  • CES_Imaging
    Technician

    50+ Posts
    • Nov 2012
    • 65
    #1

    Strange Gaps in Images with Specific Colors on MX-C311

    I have two MX-C311 machines I'm working on refurbing. I'll be honest, they've been sitting unused in a warehouse for the good portion of a year. When I printed some tests using SIM 64-1, I noticed some absences in areas of specific colors. Black and Yellow on one, Magenta and Yellow on the other. I've swapped developers, drums, transfer belts, cleaned the LSU, none of it seems to fix the gaps. They're consistent across the width of the document and seem to happen only on the edges.

    Here are scanned samples.
    MX-4101N_20140326_125804.pdfMX-4101N_20140326_125826.pdf

    Any Ideas?
    Tags: None
    • blackcat4866
      Master Of The Obvious

      Site Contributor
      10,000+ Posts
      • Jul 2007
      • 22927
      #2
      Re: Strange Gaps in Images with Specific Colors on MX-C311

      To me it looks like the developer starter has shifted to one side of the unit. We see this all the time on new Kyocera units that have been stored on end.

      For the Kyocera units we determine which side is lacking developer, then vigorously shake some developer in that direction (the individual developing unit, not the whole machine). Running a stir does not seem to help, even after 4 or 5 tries. It's just a waste of time. If you look at the developing brush, you should be able to detect the lack of fill. =^..^=
      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

        • CES_Imaging
          Technician

          50+ Posts
          • Nov 2012
          • 65
          #3
          Re: Strange Gaps in Images with Specific Colors on MX-C311

          That was my first thought too, but I've swapped developer units completely and there isn't a change at all. The same area is blank, down to the millimeter. The brush looks completely and evenly coated on all 4 colors. I also tried different drums, drum units, I tried a different transfer belt and I wiped off the LSU. Is there a PTC in this machine? I doubt that is the issue but it's something to try.

            Comment

            • blackcat4866
              Master Of The Obvious

              Site Contributor
              10,000+ Posts
              • Jul 2007
              • 22927
              #4
              Re: Strange Gaps in Images with Specific Colors on MX-C311

              It's possible that it's a primary transfer issue. Remove the transfer belt, and check that the individual transfer rollers are snapped into their holders. They are notorious for falling out, even in new units.

              You can test this by emergency stopping the machine and check that the developed image on the particular color drum is good, yet the developed image on the primary belt is incomplete. =^..^=
              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

                • austonrush
                  Sharp & HP Tech

                  100+ Posts
                  • Jan 2010
                  • 234
                  #5
                  Re: Strange Gaps in Images with Specific Colors on MX-C311

                  Originally posted by blackcat4866
                  It's possible that it's a primary transfer issue. Remove the transfer belt, and check that the individual transfer rollers are snapped into their holders. They are notorious for falling out, even in new units. =^..^=

                  I agree, it looks like a transfer problem, try printing a sold page of colour and stop the copier mid print. Are the drums fully coated? If so you have a transfer issue.

                    Comment

                    • elamurugu
                      Technician
                      • Mar 2014
                      • 27
                      #6
                      Re: Strange Gaps in Images with Specific Colors on MX-C311

                      The colour drum unit seel open and touch the ITB.

                        Comment

                        • Akitu
                          Legendary Frost Spec Tech

                          Site Contributor
                          2,500+ Posts
                          • Oct 2010
                          • 2595
                          #7
                          Re: Strange Gaps in Images with Specific Colors on MX-C311

                          This can also happen if the primary transfer gear cracks and the belt begins slipping.
                          Cthulhu for president! Why settle for the lesser evil?

                            Comment

                            • CES_Imaging
                              Technician

                              50+ Posts
                              • Nov 2012
                              • 65
                              #8
                              Re: Strange Gaps in Images with Specific Colors on MX-C311

                              The Transfer Belt rollers are in place and the gears look ok.

                                Comment

                                • Akitu
                                  Legendary Frost Spec Tech

                                  Site Contributor
                                  2,500+ Posts
                                  • Oct 2010
                                  • 2595
                                  #9
                                  Re: Strange Gaps in Images with Specific Colors on MX-C311

                                  Have you checked your laser shutter functionality?
                                  Cthulhu for president! Why settle for the lesser evil?

                                    Comment

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