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  1. #11
    Service Manager 5,000+ Posts
    Bizhub 421-500 install drum and developer unit

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    Re: Bizhub 421-500 install drum and developer unit

    Quote Originally Posted by shadows View Post
    No , right now in copyer is not oem bizhub toner
    I suspect that will be your issue.

    You’ve spent $$$ on drum & dev but cut costs on toner.
    We call this false economy.
    Let us eat, drink, and be merry, because tomorrow we may die!

    For all your firmware & service manual needs please visit us at:

    www.copierfirmware.co.uk - www.printerfirmware.co.uk




  2. #12
    RTFM!! 5,000+ Posts allan's Avatar
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    Re: Bizhub 421-500 install drum and developer unit

    if there is no visible damage to the drum then just check and/or replace the cleaning blade. Could be a very old new unit??
    Whatever

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