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  1. #1
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    Bizhub C550 Solid Black Copies

    Hi.... We have a Bizhub C550 which intermittantly throws out completely solid black copies. Have tried numerous new K image units being replaced. By pulling out the unit and pushing back in, this normally gets it working for a while again. So, has anyone had connection or HV problems. Thanks.

  2. #2
    Service Manager 5,000+ Posts
    Bizhub C550 Solid Black Copies


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    Lightbulb Re: Bizhub C550 Solid Black Copies

    This Parts & Service Manual can now be purchased for $12.77 and downloaded immediately after payment from:


    http://www.justmanuals.com


    paul@justmanuals.com

  3. #3
    Service Manager 5,000+ Posts
    Bizhub C550 Solid Black Copies

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    Re: Bizhub C550 Solid Black Copies

    Did you ever find a fix for this? As I have the same issue on a 423!!??
    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




  4. #4
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    Re: Bizhub C550 Solid Black Copies

    Quote Originally Posted by copier tech View Post
    Did you ever find a fix for this? As I have the same issue on a 423!!??
    We were lucky enough to have a donor machine, so we ripped out all the main units including the Print Head and MFP Board etc. Unfortunately we still get the occasional black copy....but it's a lot better than before !

  5. #5
    Service Manager 5,000+ Posts
    Bizhub C550 Solid Black Copies

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    Re: Bizhub C550 Solid Black Copies

    Well I was lucky, I simply replaced the image unit & that fixed it, a week later it's still ok!
    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




  6. #6
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    Thumbs up Re: Bizhub C550 Solid Black Copies

    We had a similar problem but our machine loosing developer and was not leaking developer was leaving the imaging unit K with the toner we did everything that you have done but ended up stripping the HV board out and cleaning all the cotacts and basically cleaning the machine thoroughly.
    I know major job but 8 months later the machine is still going strong PM issues only no funny issues. Good luck!

  7. #7
    Service Manager 1,000+ Posts
    Bizhub C550 Solid Black Copies


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    Re: Bizhub C550 Solid Black Copies

    Quote Originally Posted by grimreeper View Post
    We had a similar problem but our machine loosing developer and was not leaking developer was leaving the imaging unit K with the toner we did everything that you have done but ended up stripping the HV board out and cleaning all the cotacts and basically cleaning the machine thoroughly.
    I know major job but 8 months later the machine is still going strong PM issues only no funny issues. Good luck!
    Just a little not about the K IUs on these: There is a Black IU mod bracket sold for these (or you can simply put some paper/cleaning pad/rubber/whatever between the latch and the IU to make a more snug fit with the HV contacts

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