Bizhub C250 Printing alternating black smudges on top half, making new noise

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  • ttomw
    • May 2025
    #1

    Bizhub C250 Printing alternating black smudges on top half, making new noise

    See attachment.

    This machine is printing alternating black smudges on top half of prints only. When I print or copy something with no content in top half it comes out clean. Also only seems to affect black. Printed some solid color images and only black content or text on top half of page is effected.

    There is also loud repeating cycling noise jus before and after a print job is in process,... a sound I have never heard before this print defect started occuring.

    Recently replaced waste toner cartridge...

    Any Ideas?
    Thanks!,
    Tom
    Attached Files
    Tags: alter, bizhub, black, c250, cartridge, color, job, printing, toner
    • mo0651
      Service Manager

      1,000+ Posts
      • Apr 2009
      • 1054
      #2
      Re: Bizhub C250 Printing alternating black smudges on top half, making new noise

      What does the fusing unit look like. A lot of smearing and blurring.

        Comment

        • JustManuals
          Field Supervisor

          5,000+ Posts
          • Jan 2006
          • 9838
          #3
          Re: Bizhub C250 Printing alternating black smudges on top half, making new noise

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

          Just Manuals ~ The Internet's largest selection of manuals ~ Instant Downloads

          Paul@justmanuals.com

            Comment

            • ttomw
              #4
              Re: Bizhub C250 Printing alternating black smudges on top half, making new noise

              Originally posted by mo0651
              What does the fusing unit look like. A lot of smearing and blurring.
              No the fusing unit looks clean, ... at least on visual inspection of the rollers with the cover open. I haven't removed it to look beyond that. I would think that if it were a mess in the fusing unit it would show up on the clean prints (sample text at bottom of page... nothing at top), but it doesn't. They come out clean if there is no content in the top half... imagine the attached sample with white space only in the top of the page.

              Thanks.

                Comment

                • ttomw
                  #5
                  Re: Bizhub C250 Printing alternating black smudges on top half, making new noise

                  Originally posted by manuals4you
                  This Parts & Service Manual can now be purchased for $12.77 and downloaded immediately after payment from

                  Just Manuals ~ The Internet's largest selection of manuals ~ Instant Downloads

                  Paul@justmanuals.com
                  Already have this service manual ....thanks.

                    Comment

                    • mo0651
                      Service Manager

                      1,000+ Posts
                      • Apr 2009
                      • 1054
                      #6
                      Re: Bizhub C250 Printing alternating black smudges on top half, making new noise

                      envelope levers? I have a customer who likes to leave them open.

                        Comment

                        • ttomw
                          #7
                          Re: Bizhub C250 Printing alternating black smudges on top half, making new noise

                          Originally posted by mo0651
                          envelope levers? I have a customer who likes to leave them open.
                          No. They are up. First thing I checked.

                          Thanks.

                            Comment

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