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  1. #1
    Senior Tech 250+ Posts
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    C454 cyan prints and hazy text

    Hey there all. Hope all is well. I can't figure out why we are getting prints
    But the text is hazy and then we are getting blue prints especially in the edges.
    Please assist thanks

    Sent from my SM-G780G using Tapatalk

  2. #2
    Service Manager 5,000+ Posts
    C454 cyan prints and hazy text

    copier tech's Avatar
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    Re: C454 cyan prints and hazy text

    Quote Originally Posted by positiveg View Post
    Hey there all. Hope all is well. I can't figure out why we are getting prints
    But the text is hazy and then we are getting blue prints especially in the edges.
    Please assist thanks

    Sent from my SM-G780G using Tapatalk
    More information will help.

    What are the image unit, developer & transfer unit life ?

    Are you using genuine Konica Minolta toner ?
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  3. #3
    Service Manager 5,000+ Posts tsbservice's Avatar
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    Re: C454 cyan prints and hazy text

    If you change C drum with another Y drum what is outcome?
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  4. #4
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    Re: C454 cyan prints and hazy text

    Will share the life of the toners. Yep Genuine.

    I'll t4y to switch the drums around thanks

    Sent from my SM-G780G using Tapatalk

  5. #5
    RTFM!! 5,000+ Posts allan's Avatar
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    Re: C454 cyan prints and hazy text

    Any p-codes? Could be a layer issue before the PDF was created? Use Adobe to print from.
    Seen this before and looks like an issue with the document itself.
    Whatever

  6. #6
    Aging Tech 10,000+ Posts
    C454 cyan prints and hazy text

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    Re: C454 cyan prints and hazy text

    Have you cleaned the IDC sensors under the transfer belt?

  7. #7
    Step aside, noob 1,000+ Posts EarthKmTech's Avatar
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    Re: C454 cyan prints and hazy text

    blue on the edge of the sheets is notorious on this model, note that it may not be visible till much later in imperial paper size regions due to the shorter cross direction width of the sheets.

    Developing roller side seals dont do a great job, particularly on the cyan dev units. Cyan toner ends up contaminating the charge section at the same end where the leak starts, and you get fading in that zone. Eventually developer abraids the drum in this area too and you get tough textured cyan marks down that side of the page.

    It is very important to vacuum out the developer suction ports when replacing developing units and vacuum / replace the toner filter. Never let it clog up. I also set the cyan TCR value to -2 (optional)

    When the developing unit has failed, its important to replace it with the drum together at the same time.

  8. #8
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    Re: C454 cyan prints and hazy text

    Quote Originally Posted by allan View Post
    Any p-codes? Could be a layer issue before the PDF was created? Use Adobe to print from.
    Seen this before and looks like an issue with the document itself.
    No it happens with all our docs. Whether jog pdf. Text just shows up like that

    Sent from my SM-G780G using Tapatalk

  9. #9
    Senior Tech 250+ Posts
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    Re: C454 cyan prints and hazy text

    Quote Originally Posted by EarthKmTech View Post
    blue on the edge of the sheets is notorious on this model, note that it may not be visible till much later in imperial paper size regions due to the shorter cross direction width of the sheets.

    Developing roller side seals dont do a great job, particularly on the cyan dev units. Cyan toner ends up contaminating the charge section at the same end where the leak starts, and you get fading in that zone. Eventually developer abraids the drum in this area too and you get tough textured cyan marks down that side of the page.

    It is very important to vacuum out the developer suction ports when replacing developing units and vacuum / replace the toner filter. Never let it clog up. I also set the cyan TCR value to -2 (optional)

    When the developing unit has failed, its important to replace it with the drum together at the same time.
    Thanks I'll pull the dev and see. But you are right it spills unto the drum and in fact on the mag and yellow drum too.
    But I'll check the cyan dev unit and let you know plus also change the values

    Sent from my SM-G780G using Tapatalk

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