Bizhub C550 Solid Black Copies

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  • Guy Milner
    Technician

    50+ Posts
    • Nov 2013
    • 61
    #1

    [CQ] Bizhub C550 Solid Black Copies

    Hi.... We have a Bizhub C550 which intermittantly throws out completely solid black copies. Have tried numerous new K image units being replaced. By pulling out the unit and pushing back in, this normally gets it working for a while again. So, has anyone had connection or HV problems. Thanks.
    Tags: bizhub, bizhub c550, black, black copies, c550, connection, copies, image, units
    • JustManuals
      Field Supervisor

      5,000+ Posts
      • Jan 2006
      • 9919
      #2
      Re: Bizhub C550 Solid Black Copies

      This Parts & Service Manual can now be purchased for $12.77 and downloaded immediately after payment from:


      http://www.justmanuals.com



      paul@justmanuals.com

        Comment

        • copier tech
          Field Supervisor

          5,000+ Posts
          • Jan 2014
          • 7879
          #3
          Re: Bizhub C550 Solid Black Copies

          Did you ever find a fix for this? As I have the same issue on a 423!!??
          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
          ​

            Comment

            • Guy Milner
              Technician

              50+ Posts
              • Nov 2013
              • 61
              #4
              Re: Bizhub C550 Solid Black Copies

              Originally posted by copier tech
              Did you ever find a fix for this? As I have the same issue on a 423!!??
              We were lucky enough to have a donor machine, so we ripped out all the main units including the Print Head and MFP Board etc. Unfortunately we still get the occasional black copy....but it's a lot better than before !

                Comment

                • copier tech
                  Field Supervisor

                  5,000+ Posts
                  • Jan 2014
                  • 7879
                  #5
                  Re: Bizhub C550 Solid Black Copies

                  Well I was lucky, I simply replaced the image unit & that fixed it, a week later it's still ok!
                  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
                  ​

                    Comment

                    • grimreeper
                      Technician
                      • Apr 2014
                      • 12
                      #6
                      Re: Bizhub C550 Solid Black Copies

                      We had a similar problem but our machine loosing developer and was not leaking developer was leaving the imaging unit K with the toner we did everything that you have done but ended up stripping the HV board out and cleaning all the cotacts and basically cleaning the machine thoroughly.
                      I know major job but 8 months later the machine is still going strong PM issues only no funny issues. Good luck!

                        Comment

                        • Synaux
                          Service Manager

                          Site Contributor
                          1,000+ Posts
                          • Mar 2012
                          • 1224
                          #7
                          Re: Bizhub C550 Solid Black Copies

                          Originally posted by grimreeper
                          We had a similar problem but our machine loosing developer and was not leaking developer was leaving the imaging unit K with the toner we did everything that you have done but ended up stripping the HV board out and cleaning all the cotacts and basically cleaning the machine thoroughly.
                          I know major job but 8 months later the machine is still going strong PM issues only no funny issues. Good luck!
                          Just a little not about the K IUs on these: There is a Black IU mod bracket sold for these (or you can simply put some paper/cleaning pad/rubber/whatever between the latch and the IU to make a more snug fit with the HV contacts

                            Comment

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