KM C450 black image problems

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  • stryker3k
    replied
    There was problems with the IU's a while ago, but I agree with mrwho above....A simple clean of the K LED will most likely fix it.

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  • ddude
    replied
    There have been problems with the IUs-

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  • mrwho
    replied
    First try to wash the black printhead with a moist pad and then clean it dry. The reason why this could affect only one type of paper is because the machine adjusts toner density on heavier papers, so a dirty printhead could not show on heavier paper. If that doesn't work, try to swap the black IU with another (used) one to see if the problem changes.

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  • lanierboy
    started a topic [CQ] KM C450 black image problems

    KM C450 black image problems

    Hello Everyone,

    I have a customer with a C450 Minolta machine, colour prints are fine but when we do 80gsm black only we get some halo's and smudging around the text.

    thick paper setting seems to be unaffected, i have changed the fuser loop sensor as i have had that cause this before and the fusing unit is new.

    anyone had this before??

    cheers
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