Poor print quality on Konica Minolta C454e

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  • U12runzn
    Junior Member
    • Jan 2022
    • 5

    [Misc] Poor print quality on Konica Minolta C454e

    Hi I'm having issues when I print , the page background has black shades that get worse as the machine prints . As if the prints are dirty .
    Steps taken in attempt to resolve the problem -
    Changed entire drum unit Corona wire included
    Changed developer
    Change transfer belt
    Everything was changed with original parts
    Cleaned printhead laser glass
    Technician went into service menu and calibrated a few times
    It seems as if the first printed less dirty and as the machine prints more copies the black shadow increases. It prints all colours but the black shadows print over .
    What else could possibly be wrong with this machine
    The technician thinks the HV needs replacing .
    I'm not sure if this is related to the issue but the last toner inserted into the machine was depleting very quickly while printing however it was printing perfect
    Screenshot_20220117_031202.jpgScreenshot_20220117_031202.jpg
  • Synthohol
    Certified Konica Expert

    Site Contributor
    5,000+ Posts
    • Mar 2016
    • 5383

    #2
    Re: Poor print quality on Konica Minolta C454e

    lemme ask you, were entire brand new OEM units replaced or simply rebuilt?
    i ask because you said developer not developer unit which suggests only the powder.
    you also mentioned including the corona wire, if an OEM unit were replaced that wouldnt be a detail i would need to mention.
    if this is the case try new units from KM, unless you have a front side board you can swap from another machine?
    We know a thing or two because we've seen a thing or two.
    The medication helps though...

    Comment

    • Max
      Senior Tech

      500+ Posts
      • Oct 2011
      • 522

      #3
      Re: Poor print quality on Konica Minolta C454e

      Go to service mode and print out C Y M K test sheets. Line them up and if white lines line up then it will be the belt. Waste belt relay pipe not blocked? If not, developer gap blade contaminated with clumps of toner preventing uniform brush. Oem/compatible toner? Take out laser unit and clean glass by hand as magic wand doesn't always work. Compatible drums don't always work. Possibly transfer roller but in my experience unlikely nor HV board.

      Comment

      • U12runzn
        Junior Member
        • Jan 2022
        • 5

        #4
        Re: Poor print quality on Konica Minolta C454e

        Originally posted by Max
        Go to service mode and print out C Y M K test sheets. Line them up and if white lines line up then it will be the belt. Waste belt relay pipe not blocked? If not, developer gap blade contaminated with clumps of toner preventing uniform brush. Oem/compatible toner? Take out laser unit and clean glass by hand as magic wand doesn't always work. Compatible drums don't always work. Possibly transfer roller but in my experience unlikely nor HV board.
        Thanks your post was very helpful. Problem sorted

        Comment

        • U12runzn
          Junior Member
          • Jan 2022
          • 5

          #5
          Re: Poor print quality on Konica Minolta C454e

          Originally posted by Synthohol
          lemme ask you, were entire brand new OEM units replaced or simply rebuilt?
          i ask because you said developer not developer unit which suggests only the powder.
          you also mentioned including the corona wire, if an OEM unit were replaced that wouldnt be a detail i would need to mention.
          if this is the case try new units from KM, unless you have a front side board you can swap from another machine?
          Issue with the laser unit . Thanks for your feedback

          Comment

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