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  1. #1
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    Lightbulb Print quality issues (lines)

    Hi Guys,

    I have a KM C258 with some issues I can't solve on my own .

    I already changed the transfer belt, and Y & C Drum (they were used parts so not sure if those are good either)

    When printing black and grey it all looks good unfortunately not so good when you print in colour


    Any of you guys have some tips ?
    Attached Files Attached Files

  2. #2
    Service Manager 1,000+ Posts kingarthur's Avatar
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    Re: Print quality issues (lines)

    clean the print heads, they look dirty
    Tip for the day; Treat every problem as your dog would.....If you cant eat it or f*ck it....then p*ss on it & walk away...

  3. #3
    Service Manager 5,000+ Posts tsbservice's Avatar
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    Re: Print quality issues (lines)

    Quote Originally Posted by needhelp View Post
    Hi Guys,

    I have a KM C258 with some issues I can't solve on my own .

    I already changed the transfer belt, and Y & C Drum (they were used parts so not sure if those are good either)
    You must know the condition of used parts when you put them for test.
    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.

    I don't reply to private messages from end users.

  4. #4
    Junior Member DeWalt_Man's Avatar
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    Re: Print quality issues (lines)

    Quote Originally Posted by needhelp View Post
    Hi Guys,

    I have a KM C258 with some issues I can't solve on my own .

    I already changed the transfer belt, and Y & C Drum (they were used parts so not sure if those are good either)

    When printing black and grey it all looks good unfortunately not so good when you print in colour


    Any of you guys have some tips ?


    id go into the service mode, look at the life of the black dev, c and y drums look worn, same with belt
    never get used parts, always get official or katun or lexmark if you wanna save some money, and use a modchip to bypass the drm

  5. #5
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    Lightbulb Re: Print quality issues (lines)

    I cleaned the print heads multiple times

    I know its not good to use used lifetime parts :P I just though it was worth the try.

    I will look in to the K dev + order a C and Y drum see how far it takes me

    thanks for the tips so far

  6. #6
    Service Manager 1,000+ Posts Gift's Avatar
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    Re: Print quality issues (lines)

    WOW ...since when does this forum handle a thread with the word "print" in the title???

    @topic:

    Well if the lines with missing colours are at the exact same position AFTER installing another drum set (no matter if they are used or not) I'd say this is not related to the drums.
    Dirt on the laser glasses can be sticky sometimes so performing a dry cleaning cycle with the service tool might not do the trick.

    I'd also recomment to print discrete full page CMYK half tone samples via service menu instead of the GDI demo page.

  7. #7
    Service Manager 1,000+ Posts kingarthur's Avatar
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    Re: Print quality issues (lines)

    Quote Originally Posted by Gift View Post
    WOW ...since when does this forum handle a thread with the word "print" in the title???

    @topic:

    Well if the lines with missing colours are at the exact same position AFTER installing another drum set (no matter if they are used or not) I'd say this is not related to the drums.
    Dirt on the laser glasses can be sticky sometimes so performing a dry cleaning cycle with the service tool might not do the trick.

    I'd also recomment to print discrete full page CMYK half tone samples via service menu instead of the GDI demo page.

    I thought it was when the title ended with the word "Print"

    he'll probably have to take the print head and clean the glass on each one
    Tip for the day; Treat every problem as your dog would.....If you cant eat it or f*ck it....then p*ss on it & walk away...

  8. #8
    Certified Konica Expert 2,500+ Posts
    Print quality issues (lines)

    Synthohol's Avatar
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    Re: Print quality issues (lines)

    Quote Originally Posted by kingarthur View Post
    I thought it was when the title ended with the word "Print"
    yes, i just tested it, the word print first is fine, only when its the last word.
    its still a bug. vBulletin 6 is out and we still run 4.2.5.
    We know a thing or two because we've seen a thing or two.
    Also don't ask me for files without a contributor badge.

  9. #9
    Service Manager 1,000+ Posts Gift's Avatar
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    Re: Print quality issues (lines)

    Quote Originally Posted by Synthohol View Post
    yes, i just tested it, the word print first is fine, only when its the last word.
    its still a bug. vBulletin 6 is out and we still run 4.2.5.
    Ah OK, now I feel reassured

  10. #10
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    Re: Print quality issues (lines)

    I did do the CMYK via service menu (its also included in the PDF)

    My thought is also the printer heads (i tried also cleaning them with isopropanol en a dry stick right after)
    Maybe I need to the whole laser unit out to give it a good cleaning???

    The lines are exacly on the same place on al the colors CMY

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