wc7556 black is coming out gray

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  • axyun
    Service Manager

    Site Contributor
    1,000+ Posts
    • Aug 2007
    • 1323
    #1

    wc7556 black is coming out gray

    Color is coming out good but black is coming out gray. It is darker toward front of machine bust gets lighte as you go toward rear of machine
    so that last quarter of page is light gray. Customer changed toner but made no difference. I went there and customer had no drum in stock
    so I swapped with one which was at 70% as black was at 20%. Made no difference.

    There is about 375k in black count. I am considering changing black dv unit and developer. No fault codes. I would think if toner motor or dv unit
    were not turning there would be a fault code. Any advice is appreciated very much. Frank
    Tags: black, coming, fault, gray, unit
    • Phil B.
      Field Supervisor

      10,000+ Posts
      • Jul 2016
      • 22808
      #2
      Re: wc7556 black is coming out gray

      Originally posted by axyun
      Color is coming out good but black is coming out gray. It is darker toward front of machine bust gets lighte as you go toward rear of machine
      so that last quarter of page is light gray. Customer changed toner but made no difference. I went there and customer had no drum in stock
      so I swapped with one which was at 70% as black was at 20%. Made no difference.

      There is about 375k in black count. I am considering changing black dv unit and developer. No fault codes. I would think if toner motor or dv unit
      were not turning there would be a fault code. Any advice is appreciated very much. Frank
      with that many pages on it .. it sounds like the K Dev unit is dying... install new..calibrate .. they ARE using OEM toner correct?

        Comment

        • axyun
          Service Manager

          Site Contributor
          1,000+ Posts
          • Aug 2007
          • 1323
          #3
          Re: wc7556 black is coming out gray

          yes. using OEM and tried 2 different ones.Thank you Phil.

            Comment

            • Phil B.
              Field Supervisor

              10,000+ Posts
              • Jul 2016
              • 22808
              #4
              Re: wc7556 black is coming out gray

              Originally posted by axyun
              yes. using OEM and tried 2 different ones.Thank you Phil.
              2 different toners? go for the dev unit!

                Comment

                • axyun
                  Service Manager

                  Site Contributor
                  1,000+ Posts
                  • Aug 2007
                  • 1323
                  #5
                  Re: wc7556 black is coming out gray

                  Thanks, Phil

                    Comment

                    • MrXerox
                      Technician

                      50+ Posts
                      • Sep 2010
                      • 76
                      #6
                      YouTube


                      Sent from my iPhone using Tapatalk

                        Comment

                        • axyun
                          Service Manager

                          Site Contributor
                          1,000+ Posts
                          • Aug 2007
                          • 1323
                          #7
                          Re: wc7556 black is coming out gray

                          Thank you Mr. Xerox . Your info and video is appreciated. Frank

                            Comment

                            • axyun
                              Service Manager

                              Site Contributor
                              1,000+ Posts
                              • Aug 2007
                              • 1323
                              #8
                              Re: wc7556 black is coming out gray

                              On Feb 8 changed black dv unit and developer and quality has improved significantly. Customer had said she had
                              heard a loud noise on the right side of machine. She thought perhaps from rear of machine. She called Saturday
                              saying machine called for magenta toner. She changed it and machine said magenta was empty and to changethough
                              it was new toner.

                              I was there yesterday and the magenta toner dispense coil was broken at the end where the gear sits at front of machine

                              I ordered a toner pipe dispense assembly today. Looked in manual and does not show how to remove and replace. just shows

                              toner motor dispense assembly in rear of machine. I did not look carefully yesterday to see how it would be removed as I did
                              not know how part(s) were available until I checked manual. Would someone please enlighten me as I have not changed that
                              assembly before. Frank

                                Comment

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