MPC4500 Full Color Scanning

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  • Copy3D
    • May 2025

    #1

    MPC4500 Full Color Scanning

    I am having an issue where the scanning on a customer's machine in full color mode picks up the black text as blue and will send it to the computer as blue. This also happens when copying in color. A counter sheet will print off in blue. If I make strictly B&W copies they look great. I have cleaned the optics thoroughly. Any ideas?
  • unisys12
    Trusted Tech

    250+ Posts
    • Jul 2007
    • 490

    #2
    When was the last time the machine was calibrated? I'm horrible with numbers, so I don't remember the exact SP, but it's ACC Reset and is located in Section 5 of the SP's. Just reset to factory default and go back through the calibrations in User Tools.

    Before you do that though, I would check your PM counts on your Dev Units and PCU's. If any are close to going over or have gone over, replace them first! Then copy a test target and check for quality of reproduction. As long as your 4 colors (CMYK) are good, your red green and blues should be good.

    If your counter prints out blue... you got issues my brother!
    sigpic
    The first law states that energy is conserved: The change in the internal energy is equal to the amount added by heating minus the amount lost by doing work on the environment.

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    • Copierdocisleofman
      Senior Technician

      50+ Posts
      • Aug 2009
      • 86

      #3
      Are the optics clean etc. also you could do with calibrating the copying etc. - try doing a test print from inside the machine and check the quality, if the quality is ok you are probably looking at a optics issue.

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      • homer
        Technician
        • Nov 2009
        • 18

        #4
        If you lay it on the gass is it different from the ARDF? I can't tell you the SP code but the machine has a setting for scanning in the 4XXX range that I had that was so far off of the factory setting on the birth certificate that scans through the ARDF were pink in tint. But not on the glass. It had 2 sub sets book or DF or scan, meaning ADF or glass. I set them to birth certificate setting, not factory default and the problem got alot better. I think it was grey balance but I am not sure. You can alway change it back if this isn't it. but I will say color accuracey in the ARDF is hard because the paper is slightly bent and shows odd reflections from paper. On the glass is better for color accuracey for scanning.

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        • Jomama46
          Field Supervisor

          Site Contributor
          2,500+ Posts
          • Apr 2008
          • 2900

          #5
          ACC is in User Tools> Maintenance.
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          You never realize how cheap a professional is until after you let an amateur do it.
          A+; Network +; PDI+

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          • CANCOUNTRY TECH
            Trusted Tech

            100+ Posts
            • Aug 2008
            • 114

            #6
            had this exact same problem.Its your optics/mirrors clean them youll be fine.

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