Light K tones not printing on C6500

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  • adeyemi
    Trusted Tech

    250+ Posts
    • Apr 2010
    • 377

    Light K tones not printing on C6500

    The k prints 100% solid very well but lower percentages of k tones prints very light. You have to make it up to 60% to see any black print. The black is almost completely blank for lower percentages than 60%. The other colors are printing well. The IPB, K Write unit and Write unit cables have been replaced without any resolution.
    Dgtal
  • Phil B.
    Field Supervisor

    10,000+ Posts
    • Jul 2016
    • 22808

    #2
    Re: Light K tones not printing on C6500

    Originally posted by adeyemi
    The k prints 100% solid very well but lower percentages of k tones prints very light. You have to make it up to 60% to see any black print. The black is almost completely blank for lower percentages than 60%. The other colors are printing well. The IPB, K Write unit and Write unit cables have been replaced without any resolution.
    were the colors calibrated? laser lens cleaned ?

    Comment

    • adeyemi
      Trusted Tech

      250+ Posts
      • Apr 2010
      • 377

      #3
      Re: Light K tones not printing on C6500

      Originally posted by Phil B.
      were the colors calibrated? laser lens cleaned ?
      Yes, Laser lenses were cleaned. If you mean calibration of the print controller, yes....i calibrated using the i-one calibrator through command work station, because i use IC408. The point however is that even the internal test prints that does not pass through the IC408 shows the problem.
      Dgtal

      Comment

      • Desert Rat
        Service Manager

        Site Contributor
        1,000+ Posts
        • May 2008
        • 1089

        #4
        Re: Light K tones not printing on C6500

        What else have you done for this problem? Were the drums, dev and chargers recently replaced?
        I will usually check the Gamma sensor offset. Adjust the gain so you can see a 10% patch between
        the lines. Check this adjustment in the book first. I will check this after PM's and if other quality issues
        appear.

        DR

        Comment

        • Synthohol
          Certified Konica Expert

          Site Contributor
          5,000+ Posts
          • Mar 2016
          • 5580

          #5
          Re: Light K tones not printing on C6500

          you need to calibrate the engine first controller last.
          follow the sequence you would do after a PM.
          We know a thing or two because we've seen a thing or two.
          The medication helps though...

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