MX5001N-Bad copies, good prints. TC 44-6 and 44-26 Failure

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  • chris_c
    Technician
    • May 2012
    • 34
    #1

    [CQ] MX5001N-Bad copies, good prints. TC 44-6 and 44-26 Failure

    I have an Mx5001 Sharp color copier with color quality issues. DV, drum units, Primary transfer unit, and main drive unit, all replaced. Calibrated machine, but I get a C_HV_ERR code with the TC 44-6 and a C,M,Y error with TC 44-26. Customer can print a map from computer and the quality looks great, but when they try to make copies, it looks more brown and yellow than green (no cyan on copies?). Ive checked the LSU shutter motors. I think the other parts I haven't replaced have been the secondary transfer unit, and the LSU. Any suggestions would be welcomed and appreciated.
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    • Akitu
      Legendary Frost Spec Tech

      Site Contributor
      2,500+ Posts
      • Oct 2010
      • 2595
      #2
      Re: MX5001N-Bad copies, good prints. TC 44-6 and 44-26 Failure

      C_HV_Err seems to be a high voltage problem. I'd suggest cracking out your meter and tracing the line...
      Cthulhu for president! Why settle for the lesser evil?

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        • chris_c
          Technician
          • May 2012
          • 34
          #3
          Re: MX5001N-Bad copies, good prints. TC 44-6 and 44-26 Failure

          I thought HV referenced high voltage, but in the manual shows the error to be a high density error (but I know that it could still be connected to an electrical issue). The thing that is confusing to me, is that the prints look perfect. Its only when copying that there is a huge difference in color quality. If it was a high voltage PWB or even a connector issue, wouldn't the self prints and computer generated prints be affected as well?

            Comment

            • Akitu
              Legendary Frost Spec Tech

              Site Contributor
              2,500+ Posts
              • Oct 2010
              • 2595
              #4
              Re: MX5001N-Bad copies, good prints. TC 44-6 and 44-26 Failure

              Higher voltage will pull more toner, thereby increasing the density, so either way it's correct. It seems like your print engine is properly calibrated, but only your copy engine is out of whack.

              From the info you've given, your problem seems limited almost exclusively to cyan. I would still trace the 5v line to your cyan dev unit and see if your readings are where they should be.
              Cthulhu for president! Why settle for the lesser evil?

                Comment

                • JustManuals
                  Field Supervisor

                  5,000+ Posts
                  • Jan 2006
                  • 9838
                  #5
                  Re: MX5001N-Bad copies, good prints. TC 44-6 and 44-26 Failure

                  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

                    • chris_c
                      Technician
                      • May 2012
                      • 34
                      #6
                      Re: MX5001N-Bad copies, good prints. TC 44-6 and 44-26 Failure

                      Was advised to run TC 44-27. I was able to re-calibrate after that. I wish everything was that simple....

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