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  1. #11
    Service Manager 2,500+ Posts
    C451 Printing issue, Black Imaging Unit?


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    Re: C451 Printing issue, Black Imaging Unit?

    If you replace the black dev unit make sure you install the mod or it will dump again. There are 2 mods, one is the bracket I mentioned in my earlier post and the other is to build up pad on blue handle to push unit into machine tighter.
    If you PM me your email I'll send you the 2 bulletins addressing this issue

  2. #12
    Master Of The Obvious 10,000+ Posts
    C451 Printing issue, Black Imaging Unit?

    blackcat4866's Avatar
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    Re: C451 Printing issue, Black Imaging Unit?

    Oh ... how about this pattern?:

    s-l1600 (7).jpg
    If you'd like a serious answer to your request:
    1) demonstrate that you've read the manual
    2) demonstrate that you made some attempt to fix it.
    3) if you're going to ask about jams include the jam code.
    4) if you're going to ask about an error code include the error code.
    5) You are the person onsite. Only you can make observations.

    blackcat: Master Of The Obvious =^..^=

  3. #13
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    Re: C451 Printing issue, Black Imaging Unit?

    Quote Originally Posted by copier tech View Post
    Yes I agree as has been said here, you'll need a new black IU, very expensive & even after you replace it the same issue could return.

    Personally I would scrap this machine & not waste any time or money on it.

    You can pick up copier cheap on ebay, look at the Bizhub C224/e series a good reliable model with excellent print quality, cheaper to maintain too.
    I picked up this copier for $0, so I'm not overly concerned about putting a little in. The machine was delivered to me by the State of Nevada as it's one of the old State office Copiers.

    I can pickup a brand new black IU from a supplier locally for 250$, then mod the unit to have some tighter grip. I'd rather repair it than junk it considering it's not that bad a machine

  4. #14
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    Re: C451 Printing issue, Black Imaging Unit?

    Quote Originally Posted by blackcat4866 View Post
    Oh ... how about this pattern?:

    s-l1600 (7).jpg
    Blackcat, that is the gradient pattern I printed on the copier when testing it, that pattern is from the test pattern menu gradient test.

    It's supposed to print 5 bars of black, each slightly brighter than the last

  5. #15
    Service Manager 2,500+ Posts
    C451 Printing issue, Black Imaging Unit?


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    Re: C451 Printing issue, Black Imaging Unit?

    That model is very old! you should be able to find a black DEV unit for less than that. ebay, etc

  6. #16
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    Re: C451 Printing issue, Black Imaging Unit?

    Quote Originally Posted by copyman View Post
    That model is very old! you should be able to find a black DEV unit for less than that. ebay, etc
    I can find Used units for under 120$ but I'm unsure if I can use used units without dev spilling during shipment?

  7. #17
    Service Manager 2,500+ Posts
    C451 Printing issue, Black Imaging Unit?


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    Re: C451 Printing issue, Black Imaging Unit?

    I forgot that the black drum & developer was sold complete as Image unit. So if you can get it for $250 that is good price. I would not buy a used one.

  8. #18
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    Re: C451 Printing issue, Black Imaging Unit?

    Quote Originally Posted by copyman View Post
    I forgot that the black drum & developer was sold complete as Image unit. So if you can get it for $250 that is good price. I would not buy a used one.
    Thats what I thought. Its funny the other Copytech who called me to help said the same thing "Oh wait, thats right, they are a combined unit, yeah thats more like 300$ not 100"

  9. #19
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    Re: C451 Printing issue, Black Imaging Unit?

    Not here meaning to bump a 2 year old thread, but life had gotten in the way for quite some time and I had taken a second job for a while, and was using a different machine

    I took the entire machine apart and cleaned all the developer that had dumped out, I bought a brand new OEM image unit and the official bracket to hold the black image unit into place to prevent future problems. It has been working for a few months now since replacing the black image unit, and the prints seem to be fine!

    I just wanted to post some closure on this and for anyone who may stumble upon this thread via a google search. I hate unresolved threads, thank you everyone!

  10. #20
    Master Of The Obvious 10,000+ Posts
    C451 Printing issue, Black Imaging Unit?

    blackcat4866's Avatar
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    Re: C451 Printing issue, Black Imaging Unit?

    Thanks for following up. =^..^=
    If you'd like a serious answer to your request:
    1) demonstrate that you've read the manual
    2) demonstrate that you made some attempt to fix it.
    3) if you're going to ask about jams include the jam code.
    4) if you're going to ask about an error code include the error code.
    5) You are the person onsite. Only you can make observations.

    blackcat: Master Of The Obvious =^..^=

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