Konica Minolta C658 Quality issue

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  • Kenny
    Senior Tech

    Site Contributor
    500+ Posts
    • Jun 2009
    • 504

    Konica Minolta C658 Quality issue

    Good Morning,

    Ive got a quality issue with a Konica Minolta C658,

    Ive replaced the cyan drum for blue lines, calibrated the copier cleaned IDC sensors and all the halftones are perfect but when trying to print a document it coming out more green / blue when it should be a solid blue,

    Ive printed the same document on a different C658 from the same Mac & PC and it prints perfectly,

    There is no p codes on the copier and nothing is over life,

    The test page looks perfect too but something is not right,

    I will attached some examples,

    the 2nd example is how it should print,


    Has anyone else had this issue before?
    Attached Files
  • tsbservice
    Field tech

    Site Contributor
    5,000+ Posts
    • May 2007
    • 7635

    #2
    Re: Konica Minolta C658 Quality issue

    Did you put new cyan drum unit?
    A tree is known by its fruit, a man by his deeds. A good deed is never lost, he who sows courtesy, reaps friendship, and he who plants kindness gathers love.
    Blessed are they who can laugh at themselves, for they shall never cease to be amused.

    Comment

    • Profibastler
      Technician

      50+ Posts
      • Nov 2014
      • 84

      #3
      Re: Konica Minolta C658 Quality issue

      Hi, did you tried change cyan toner.
      Adjust color registration - SM I-103,
      Imaging process adj - SM I-108.
      Mix new toner in dev unit with code 50 - SM I-204
      At last change deve unit.




      Originally posted by Kenny
      Good Morning,

      Ive got a quality issue with a Konica Minolta C658,

      Ive replaced the cyan drum for blue lines, calibrated the copier cleaned IDC sensors and all the halftones are perfect but when trying to print a document it coming out more green / blue when it should be a solid blue,

      Ive printed the same document on a different C658 from the same Mac & PC and it prints perfectly,

      There is no p codes on the copier and nothing is over life,

      The test page looks perfect too but something is not right,

      I will attached some examples,

      the 2nd example is how it should print,


      Has anyone else had this issue before?

      Comment

      • Markks
        Senior Tech

        Site Contributor
        VIP Subscriber
        500+ Posts
        • Feb 2018
        • 520

        #4
        Re: Konica Minolta C658 Quality issue

        What is the count on the rest of the consumables? If they still have a lot of life I recommend the following


        Run Initialize and stabilize
        Procedure
        1. Call the Service Mode to the screen.
        2. Touch [Imaging Process Adjustment] -> [Stabilizer].
        3. Touch [Initialize+Image Stabilization].
        4. Press the Start key to start Stabilizer.
        The Start key turns orange and stays lit up orange during the Stabilizer sequence.
        5. Stabilizer is completed when the Start key turns blue.

        Then Run your Gradation Adjustment on a high grade paper making sure you put 10 sheets on top of the test pattern before scanning it. I would run it a minimum of three times for each setting.

        Comment

        • copier tech
          Field Supervisor

          5,000+ Posts
          • Jan 2014
          • 7931

          #5
          Re: Konica Minolta C658 Quality issue

          Originally posted by Kenny
          Good Morning,

          Ive got a quality issue with a Konica Minolta C658,

          Ive replaced the cyan drum for blue lines, calibrated the copier cleaned IDC sensors and all the halftones are perfect but when trying to print a document it coming out more green / blue when it should be a solid blue,

          Ive printed the same document on a different C658 from the same Mac & PC and it prints perfectly,

          There is no p codes on the copier and nothing is over life,

          The test page looks perfect too but something is not right,

          I will attached some examples,

          the 2nd example is how it should print,


          Has anyone else had this issue before?
          Is the device on genuine toner ?
          Let us eat, drink, and be merry, because tomorrow we may die!

          For all your firmware & service manual needs please visit us at:

          www.copierfirmware.co.uk - www.printerfirmware.co.uk

          Comment

          • femaster
            Service Manager

            1,000+ Posts
            • May 2011
            • 1417

            #6
            Re: Konica Minolta C658 Quality issue

            On my PC screen, even though the second image is what it is supposed to look like, that one looks bad to me. The people look way to "red", like they have a serious sunburn. The first one looks more "normal" to me. Could be many factors that affect that though, my uncalibrated monitor, poor color recreation when scanning you originals, etc. Just saying I like the first image better, but that's just me.
            At this point, I'd follow Markks advice and see what comes of it.
            A Ricoh Service Tech for 7 year. A Konica Minolta Service Tech for 7 years. Now, KM service manager for 4 years.
            My Ricoh knowledge is slowly dwindling away at this point. Many things have been lost to time...

            Comment

            • allan
              RTFM!!

              5,000+ Posts
              • Apr 2010
              • 5445

              #7
              Re: Konica Minolta C658 Quality issue

              +1 Initialize and stabilize. Check that all the settings under Image Process Adjustment are set to default first.
              Can be that yellow or cyan could be under or over saturated.
              Whatever

              Comment

              • allan
                RTFM!!

                5,000+ Posts
                • Apr 2010
                • 5445

                #8
                Re: Konica Minolta C658 Quality issue

                Originally posted by Profibastler
                Hi, did you tried change cyan toner.
                Adjust color registration - SM I-103,
                Imaging process adj - SM I-108.
                Mix new toner in dev unit with code 50 - SM I-204
                At last change deve unit.
                Are we on the same machine here?
                Whatever

                Comment

                • allan
                  RTFM!!

                  5,000+ Posts
                  • Apr 2010
                  • 5445

                  #9
                  Re: Konica Minolta C658 Quality issue

                  Home Care Services | Care Visits At Home | Bluebird Care

                  That does not seem to be green that would be more to cyan. These new drum units seem to suffer from cleaning blade failure on cyan due to heave coverage.

                  The only thing off here may be you customer...
                  Whatever

                  Comment

                  • femaster
                    Service Manager

                    1,000+ Posts
                    • May 2011
                    • 1417

                    #10
                    Re: Konica Minolta C658 Quality issue

                    Originally posted by femaster
                    On my PC screen, even though the second image is what it is supposed to look like, that one looks bad to me. The people look way to "red", like they have a serious sunburn. The first one looks more "normal" to me. Could be many factors that affect that though, my uncalibrated monitor, poor color recreation when scanning you originals, etc. Just saying I like the first image better, but that's just me.
                    At this point, I'd follow Markks advice and see what comes of it.
                    Originally posted by Doodlewo
                    This may be due to different factors, such as an uncalibrated monitor and problems with color reproduction when scanning.
                    Yes, I literally pointed that out in my original post, but thanks for reiterating that.
                    A Ricoh Service Tech for 7 year. A Konica Minolta Service Tech for 7 years. Now, KM service manager for 4 years.
                    My Ricoh knowledge is slowly dwindling away at this point. Many things have been lost to time...

                    Comment

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