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  1. #1
    lrockett
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    Bizhub C250 foggy patterned black background

    Hello, Ive just replaced transfer belt and 4 imaging units of a Bizhub C250. Initial prints had longitudinal clearer areas so Ive cleaned all PH / laser units with the jig. After that all colors where fine and image perfect but now some sort o patterned background appeared. Its not a usual foggy background thats evenly distributed. You can see on the picture attached. This pattern is lighter on normal paper but is darker (like the picture) on thick glossy paper.
    Ive tried the following:
    - Gradation and resolution adjutments
    - Decreased D max density
    - Decreased Background voltage margin to a less foggy background

    Someone has some other suggestion for me to try? Thanks

    Scan C250.jpgWP_20141106_002.jpg
    Last edited by lrockett; 11-06-2014 at 12:52 PM.

  2. #2
    Senior Tech 100+ Posts PeterG's Avatar
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    Re: Bizhub C250 foggy patterned black background

    I hate to say this after all that money, but it looks like an MFP board to me.

  3. #3
    Senior Tech 250+ Posts Phrag's Avatar
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    Re: Bizhub C250 foggy patterned black background

    Quote Originally Posted by PeterG View Post
    I hate to say this after all that money, but it looks like an MFP board to me.
    I tend to agree.

    You get similar marks on C360 series except they look like hieroglyphics.

  4. #4
    Service Manager 1,000+ Posts
    Bizhub C250 foggy patterned black background

    habik's Avatar
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    Re: Bizhub C250 foggy patterned black background

    Try reseating all connectors including RAM, NV RAM etc.


    Sent from my iDon't believe in marketing device using Tapatalk
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  5. #5
    lrockett
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    Re: Bizhub C250 foggy patterned black background

    Thanks guys. Ill do some more tests and come back with results. I tried swap IU Black with an older one just to check, and same problem. Ive opened the machine many times to change motor M1 so Ill check the flat cables as well.

  6. #6
    lrockett
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    Re: Bizhub C250 foggy patterned black background

    Problem solved. Cleanned the RAM memory contacts and flat cables. Everything works fine now. Thanks for the help.

  7. #7
    Service Manager 1,000+ Posts
    Bizhub C250 foggy patterned black background

    habik's Avatar
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    Re: Bizhub C250 foggy patterned black background

    Well done!


    Sent from my iDon't believe in marketing device using Tapatalk
    .OK Google! ... will I need Berrocca this morning?
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