Bizhub 751 dropping developer

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  • MVPunisher
    Trusted Tech

    Site Contributor
    100+ Posts
    • May 2013
    • 209
    #1

    Bizhub 751 dropping developer

    So I have a bizhub 751 that is dumping developer. Note - developer not toner/developer mix. I am aware that all of these dump the mix at some point during their PM cycle.

    Have replaced just about everything you would imagine. Swapped a drum carriage from another machine. Full PM. Transfer Sep. Drum.

    Yesterday I did the HVPS and PRCB together along with a fresh developer. Call back this morning same thing. Going to bring another drum up and do the drum/wires/grid/toner collect roller now that there is a new HV unit in there.

    Stumped.
    Tags: None
    • CompyTech
      Super Tech

      500+ Posts
      • Feb 2011
      • 706
      #2
      Re: Bizhub 751 dropping developer

      When you did the Trans. Sep., did you just do the wires or the whole unit? I've had faulty units mess up drums and dv before.

        Comment

        • MVPunisher
          Trusted Tech

          Site Contributor
          100+ Posts
          • May 2013
          • 209
          #3
          Re: Bizhub 751 dropping developer

          Yes I did. I've dealt with the overtoning spew problems more times than I would like to.

          Never have I had the developer itself get pulled on this model. Front if Dev unit looks clean. It isn't overtoned.

          While there today I will swap ts unit with other machine just in case.

            Comment

            • MVPunisher
              Trusted Tech

              Site Contributor
              100+ Posts
              • May 2013
              • 209
              #4
              Re: Bizhub 751 dropping developer

              The t/s unit is what I'm referring to that I will sawp.

                Comment

                • Copier Addict
                  Aging Tech

                  Site Contributor
                  10,000+ Posts
                  • Jul 2013
                  • 13991
                  #5
                  Re: Bizhub 751 dropping developer

                  On these pieces of crap the charge grid, if it is dirty or worn out, will pull dev and drop it on the entrance to the fuser and wear out the upper fuser roller. Clean or replace the charge grid.
                  Hope this helps.

                    Comment

                    • MVPunisher
                      Trusted Tech

                      Site Contributor
                      100+ Posts
                      • May 2013
                      • 209
                      #6
                      Re: Bizhub 751 dropping developer

                      I have a grid with me. Doing drum,grid, wires and toner collect roller today. All items I have already done. Hoping maybe with the new HV and prcb they will react better.

                      Thanks guys.

                        Comment

                        • pappyvonsillypants
                          Technician
                          • Feb 2013
                          • 30
                          #7
                          Re: Bizhub 751 dropping developer

                          So what was the final outcome? is it fixed, and if so what was the fix??

                            Comment

                            • MVPunisher
                              Trusted Tech

                              Site Contributor
                              100+ Posts
                              • May 2013
                              • 209
                              #8
                              Re: Bizhub 751 dropping developer

                              I ended up replacing the entire drum carriage with the dev unit and it never came back. What a nightmare,

                              Yours is dumping developer correct? I am not referring to the unfortunately "normal" overtone and toner spew. That's normal on this model lol.

                                Comment

                                • mmtshina
                                  Junior Member
                                  • Sep 2015
                                  • 9
                                  #9
                                  Re: Bizhub 751 dropping developer

                                  mek sure u r using genuine dev and reset yo image adjustments at system b4 cinfiguring charger\drum voltage

                                    Comment

                                    • Copier Addict
                                      Aging Tech

                                      Site Contributor
                                      10,000+ Posts
                                      • Jul 2013
                                      • 13991
                                      #10
                                      Re: Bizhub 751 dropping developer

                                      Originally posted by mmtshina
                                      mek sure u r using genuine dev and reset yo image adjustments at system b4 cinfiguring charger\drum voltage
                                      wt t hk dd yu jst sy?

                                        Comment

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