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  1. #1
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    KM C280 print quality problem

    Hello there,
    By default, the printer does the following problem:
    1-page-001.jpg
    If i swap the Cyan drum for Magenta drum:
    2-page-001.jpg
    i don't understand the logic, could anyone explain?
    Yours sincerely, Lakatom

  2. #2
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    Re: KM C280 print quality problem

    How are the Level Histroy values for cyan and yellow?
    If ok new blades for cyan and yellow else new drums.

  3. #3
    Senior Tech 100+ Posts
    KM C280 print quality problem

    wjurls's Avatar
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    Re: KM C280 print quality problem

    What are the drum counts? Are they near or past yield?

  4. #4
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    Re: KM C280 print quality problem

    As mentioned before , it's a drum issue .
    For yellow it seems only a drum blade issue
    Cyan seems a drum issue. If you want u can try adjusting the background level or adjust the primary transfer voltage. it might give you more time before u change it

    Sent from my SM-G610F using Tapatalk

  5. #5
    Service Manager 2,500+ Posts
    KM C280 print quality problem

    Synthohol's Avatar
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    Re: KM C280 print quality problem

    I beg to differ, the cyan dv is shot. Look at the diagonal voids on cyan blocks.
    Maybe a yellow drum issue too but the cyan dv unit definitely needs to be replaced.
    We know a thing or two because we've seen a thing or two.

  6. #6
    Service Manager 2,500+ Posts tsbservice's Avatar
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    Re: KM C280 print quality problem

    Print halftone test patterns from service mode at some diferent densities. That would expose faulty parts.
    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.

  7. #7
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    Re: KM C280 print quality problem

    level hirtory.jpg
    Cyan got a new blade for a month, but the corona unit have a "foil", its cr*p, i don't know if that could be a problem.
    Quote Originally Posted by CP-1015 View Post
    How are the Level Histroy values for cyan and yellow?
    If ok new blades for cyan and yellow else new drums.

  8. #8
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    Re: KM C280 print quality problem

    45-50%
    Quote Originally Posted by wjurls View Post
    What are the drum counts? Are they near or past yield?

  9. #9
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    Re: KM C280 print quality problem

    https://imgur.com/1LXhCTN
    https://imgur.com/tG424HO
    https://imgur.com/74caMs6
    https://imgur.com/HG7ulwk
    https://imgur.com/RUZQEtT
    I could not change the density
    Quote Originally Posted by tsbservice View Post
    Print halftone test patterns from service mode at some diferent densities. That would expose faulty parts.
    Attached Images Attached Images
    • File Type: jpg b.jpg (224.4 KB, 7 views)

  10. #10
    Service Manager 2,500+ Posts tsbservice's Avatar
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    Re: KM C280 print quality problem

    Quote Originally Posted by Lakatom View Post
    https://imgur.com/1LXhCTN
    https://imgur.com/tG424HO
    https://imgur.com/74caMs6
    https://imgur.com/HG7ulwk
    https://imgur.com/RUZQEtT
    I could not change the density
    Hit the clear button and then choose 128 with keys.
    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.

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