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  1. #1
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    BH-C-280, fine line pattern

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    BH-C-280, fine line pattern

    BH-C-280 with around 100K on the clock. Suddenly a pattern of multiple fine lines in the sub-scan direction, following the main scan direction (front to rear). This happens with scanning and ofcourse also with copying. So obviously the scanner section or the logic behind could be the cause. See attachment.

    Any ideas before I go there tomorrow please?

    (PS I know both K-Units need replacement, but this is unrelated for now))

    Hans

    SCAN-C-280-17120518100.jpg

    " Sent from my Intel i286 using MS-DOS 2.0 "

  2. #2
    Service Manager 1,000+ Posts
    BH-C-280, fine line pattern

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    Re: BH-C-280, fine line pattern

    print gradation and halftone patterns, if issue still there its not optical. laser or board usually.
    pity its still supported until 12/2019.


  3. #3
    Master Of The Obvious 10,000+ Posts
    BH-C-280, fine line pattern

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    Re: BH-C-280, fine line pattern

    I saw something like this on a machine that suffered a brownout. The machine itself was almost new. It affected only black.

    Personally I think that the laser self adjustment was completely out of whack. I ran the gradation a dozen times to bring it back into range. I could have run it another dozen times, but it was a significant improvement, and I figured there would be opportunities to do more calibration later.

    =^..^=

    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.


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

  4. #4
    Service Manager 1,000+ Posts
    BH-C-280, fine line pattern

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    Re: BH-C-280, fine line pattern

    Thanks guys, it seems that my original post is not clear enough. This happens only when an original is being scanned. Scanned "for scanning" and scanned for copying. So it is "optical"

    Internal prints and prints from outside are OK so the culprit must be the scanner section or the electronics behind it, not the laser nor print section and therefore it has nothing to do with either laser units, drum units or developing units and it is also not related to any color.

    Hans

    " Sent from my Intel i286 using MS-DOS 2.0 "

  5. #5
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    BH-C-280, fine line pattern


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    Re: BH-C-280, fine line pattern

    My gut is saying it is something with the CCD unit.

    I have replaced a few CCD's on this model but I think it was because of error code.

    Last edited by copyman; 1 Week Ago at 02:09 PM.

  6. #6
    Master Of The Obvious 10,000+ Posts
    BH-C-280, fine line pattern

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    Re: BH-C-280, fine line pattern

    Some labor-only things you can do are reseating connectors and ribbon cables at the CCD. I've never really had to mess the the mechanical aspects of a bizhub scanner. The must be fairly reliable.

    You might also check the mirror drive (cables, pulleys, belts, gears, motor).
    =^..^=

    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.


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

  7. #7
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    Re: BH-C-280, fine line pattern

    Hans[/QUOTE]

    Defect is uniformed across the page, IF IT IS ONLY IN COPING DUE TO SCANNER IT ALSO SHOULD BE PRESENT IN SCANNED IMAGE, BUT NOT IN PRINTING.
    If problem is not represented in printing, then it is either scan synchronous Motor OR PCB OR firmware, there nothing left to check.
    Hope this helps.


  8. #8
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    Re: BH-C-280, fine line pattern

    Have had some weird scan only issues with the newer series machines and doing the clear all data and formatting the HDD and SSD has fixed them. I'm not sure if the procedure is the same for the older machines, but it might be worth a try before you start spending money on parts.


  9. #9
    Senior Tech 100+ Posts Zesti's Avatar
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    Re: BH-C-280, fine line pattern

    Quote Originally Posted by Hansoon View Post
    BH-C-280 with around 100K on the clock. Suddenly a pattern of multiple fine lines in the sub-scan direction, following the main scan direction (front to rear). This happens with scanning and ofcourse also with copying. So obviously the scanner section or the logic behind could be the cause. See attachment.

    Any ideas before I go there tomorrow please?

    (PS I know both K-Units need replacement, but this is unrelated for now))

    Hans

    SCAN-C-280-17120518100.jpg
    The posted image was scanned from glass or ADF?
    Any way check the CCD cables/unit and scanner cables and lastly MFP board.


  10. #10
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    Re: BH-C-280, fine line pattern

    check the optical drive system , look for junk on the belt/capstans. does this happen when scanned through adf?


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