E-studio FC-4520C one color faded

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  • daprex
    Technician

    50+ Posts
    • Sep 2009
    • 54
    #1

    E-studio FC-4520C one color faded

    Hi i have a problem with the yellow color being faded towards the rear of the machine, if i print the color in solid the problem is not visible, but if I use like 50% desnity the color fades out about last 1/3 of the page, I have tried to recharge the dev and calibrate colors and also repaced the yellow drum. When I had everything out i cleaned the grounding contacts. The machine has printed about 150 k pages. Any ideas ?
    The other colors are ok.

    // Johan
    Tags: colors, faded, toshiba
    • arnh79
      Trusted Tech

      Site Contributor
      VIP Subscriber
      250+ Posts
      • Apr 2010
      • 468
      #2
      Re: E-studio FC-4520C one color faded

      We've had similar problems and it's turned out to be transfer belt unit. Usually transfer roller for that particular color is either worn, dirty, or out of place. Try swapping the TBU from a known working machine to see if it helps.
      Why does every customer think they're the first one to ever say: "you've been here so much we should get you an office, ha, ha, ha"?

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        • michaelc
          Field Tech

          Site Contributor
          500+ Posts
          • Mar 2011
          • 590
          #3
          Re: E-studio FC-4520C one color faded

          You can do half tone prints via the print mode which helps. Need some nice daylight to see them better. Have you tried swapping the drum units over? Are the mag rollers the modified?
          It didn't say that I couldn't do it in the manual.

            Comment

            • patwilf
              Service Technician
              • Nov 2009
              • 41
              #4
              Have you done the 05 calibrations in the service manual? After replacing any of that it needs to be done. 05-395 and 05-4719

                Comment

                • canonbundy
                  Senior Tech

                  500+ Posts
                  • Jun 2012
                  • 607
                  #5
                  Re: E-studio FC-4520C one color faded

                  Originally posted by daprex
                  Hi i have a problem with the yellow color being faded towards the rear of the machine, if i print the color in solid the problem is not visible, but if I use like 50% desnity the color fades out about last 1/3 of the page, I have tried to recharge the dev and calibrate colors and also repaced the yellow drum. When I had everything out i cleaned the grounding contacts. The machine has printed about 150 k pages. Any ideas ?
                  The other colors are ok.

                  // Johan
                  It could be the Y Transfer Roller Bushing stuck down on one side inside the ITB Unit.
                  The Mag Rollers in the earlier MASH units were prone to wearing smooth on the surface and unable to carry the Dev, the fix (Toshiba Bulletin) was to lightly & evenly roughen the surface of the roller using a fine grade emery paper, the later machines were released with 'Fluted' type Mag Rollers.

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