C452 Can't do Gradation Adjust New Bk IU

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  • habik
    Service Manager

    Site Contributor
    1,000+ Posts
    • Apr 2010
    • 2015
    #1

    C452 Can't do Gradation Adjust New Bk IU

    Hi there.

    Copier used mainly as BW. Has 1.5 mil on clock.

    Client phoned in with CQ issues:
    Top A4 or A3 having feint copies. Seemed to me optics on first, so asked them to print a page and it was coming with same result.

    Asked them to clean laser windows they did without any improvement in prints. So navigated them to Service Mode and asked to read me out the Bk Drum and Dev counter also the ITB and TR life. ITB and TR = 130k

    BK Drum was due to change and so was the dev. Ordered Drum and Dev. went to replace it. Changed it and it actually did not work to my surprise not even on Bk (1PC) Gradation test print. tried all CMYK Gradation test print with the same result. Took ITB out nice and clean no burn marks, no scratches, brush is cleaning it nicely. Cleaned both IDC sensors. Yet no Joy. Suspecting TR or ITB being shot with HV to follow. Did Print Head reset. No joy. System Error Clear. No Joy.

    Haven't had fault similar to this. YMC Imaging units are half way through life (No re-chipping or extended life) Bk Drum and Dev is brand New just fitted. Don't have similar machine in workshop right this moment to swap and eliminate parts.(HV or PWR Supply)

    Has anyone had anything similar?
    Thanks in advance for any in-sights. See attached pdf. Gradation Print.
    c452.pdf
    .OK Google! ... will I need Berrocca this morning?
    Firmwares HERE
    Tags: c452
    • tech51
      Senior Tech

      500+ Posts
      • Jan 2009
      • 840
      #2
      Re: C452 Can't do Gradation Adjust New Bk IU

      Have you tried a forced stop on A3 with a solid colour to see whats being produced on the belt. Since its in all the colours I would suspect either the belt or the transfer roller are faulty... Having thought about it if the holders on the transfer roller break on one side you get uneven pressure on the roller which causes similar problems..

        Comment

        • JustManuals
          Field Supervisor

          5,000+ Posts
          • Jan 2006
          • 9931
          #3
          Re: C452 Can't do Gradation Adjust New Bk IU

          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

            • habik
              Service Manager

              Site Contributor
              1,000+ Posts
              • Apr 2010
              • 2015
              #4
              Re: C452 Can't do Gradation Adjust New Bk IU

              Originally posted by tech51
              Have you tried a forced stop on A3 with a solid colour to see whats being produced on the belt. Since its in all the colours I would suspect either the belt or the transfer roller are faulty... Having thought about it if the holders on the transfer roller break on one side you get uneven pressure on the roller which causes similar problems..
              Thanks , did forced stop but only with gradation pattern. Have seen very slight difference to the scanned pdf. As Isaid ITB or TR just wondered if anyone had something similar. Cheers for that! ITB on order so fingers crossed and will change TR at the same time!
              .OK Google! ... will I need Berrocca this morning?
              Firmwares HERE

                Comment

                • blackcat4866
                  Master Of The Obvious

                  Site Contributor
                  10,000+ Posts
                  • Jul 2007
                  • 22619
                  #5
                  Re: C452 Can't do Gradation Adjust New Bk IU

                  Since it's affecting all colors equally I'm leaning towards a secondary transfer problem.

                  I think you'll find that when you do the stop test, the primary image is properly developed but the secondary transfer is not. =^..^=
                  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

                    • habik
                      Service Manager

                      Site Contributor
                      1,000+ Posts
                      • Apr 2010
                      • 2015
                      #6
                      Re: C452 Can't do Gradation Adjust New Bk IU

                      Closing this thread by a find of broken Transfer roller retract mechanism. See broken and temporary fix until new part arrives. Thanks for all your help especially Tech51 and BlackCat.
                      Seemed obvious, well next time more coffee in the morning for me

                      photo 1.JPGphoto 2.JPG
                      .OK Google! ... will I need Berrocca this morning?
                      Firmwares HERE

                        Comment

                        • blackcat4866
                          Master Of The Obvious

                          Site Contributor
                          10,000+ Posts
                          • Jul 2007
                          • 22619
                          #7
                          Re: C452 Can't do Gradation Adjust New Bk IU

                          I saw this subject come up a week ago in the forums on a C652, and it turned out to be those same levers.

                          They sure don't give you a lot of material to work with, do they? These kind of repairs are rarely elegant, but usually work at least in the short term.

                          Congratulations. =^..^=
                          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

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