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  1. #1
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    bizhub C250i foggy backgroud printout

    Hi everybody,

    One customer reported that the color printout has a bit foggy background, compare with B/W one.
    The color drums have 60% something and 30% something on black drum.
    The machine takes 40K color and 140K black counters.

    Any idea about this issue? thanks.
    Attached Files Attached Files

  2. #2
    Service Manager 2,500+ Posts
    bizhub C250i foggy backgroud printout

    Synthohol's Avatar
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    Re: bizhub C250i foggy backgroud printout

    i dont see anything wrong.
    you can always reset and stabilize then do the gradations 3 times each and see if it changes but frankly, im missing where the problem is.
    We know a thing or two because we've seen a thing or two.

  3. #3
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    Re: bizhub C250i foggy backgroud printout

    Sorry, I sent a new sample for reference.
    Attached Files Attached Files

  4. #4
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    bizhub C250i foggy backgroud printout


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    Re: bizhub C250i foggy backgroud printout

    Is your cyan TCR-value ok?

  5. #5
    Senior Tech 100+ Posts Dickie's Avatar
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    Re: bizhub C250i foggy backgroud printout

    I believe there is a firmware upgrade to cure a problem with too much cyan.
    A previous firmware upgrade caused the issue and it was then upgraded again to cure the issue
    This was on Develop but I assume KM initiated it.

  6. #6
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    Re: bizhub C250i foggy backgroud printout

    the cyan developer looks over toned. what do the halftone outputs look like?

  7. #7
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    Re: bizhub C250i foggy backgroud printout

    Quote Originally Posted by jwai View Post
    Hi everybody,

    One customer reported that the color printout has a bit foggy background, compare with B/W one.
    The color drums have 60% something and 30% something on black drum.
    The machine takes 40K color and 140K black counters.

    Any idea about this issue? thanks.
    you can try this:
    change switch 153 bit 6

    under pcl driver:
    quality tab/quality adjustment/other/turn pure black off

  8. #8
    Senior Tech 100+ Posts
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    Re: bizhub C250i foggy backgroud printout

    Quote Originally Posted by CP-1015 View Post
    Is your cyan TCR-value ok?
    CYMK all 6.XX%

  9. #9
    Service Manager 2,500+ Posts
    bizhub C250i foggy backgroud printout

    Synthohol's Avatar
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    Re: bizhub C250i foggy backgroud printout

    before all that, try just simply calibrating it like i suggested above.
    We know a thing or two because we've seen a thing or two.

  10. #10
    Service Manager 2,500+ Posts tsbservice's Avatar
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    Re: bizhub C250i foggy backgroud printout

    What's FW version? Your threads seems always lack valuable/basic information.
    Pulling other tech teeth is so much uncomfortable
    A tree is known by its fruit, a man by his deeds. A good deed is never lost, he who sows courtesy, reaps friendship, and he who plants kindness gathers love.

    Blessed are they who can laugh at themselves, for they shall never cease to be amused.

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