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  1. #1
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    Bizhub C258 artefacts, strange lines on printouts

    Hello guys.

    Bizhub C258 prints very strange black lines.

    Swapping PH unit + PH unit control board did not help;
    Swapping FRSB did not help;
    Swapping High Voltage Unit did not help;
    Swapping MFPB did not help.

    Machine has only 80K clicks on counter, spare parts life are about 50%, consumables are genuine.

    Any suggestions will be highly appreaciated.

    Check attachment. It's printed from service mode, with 0 bit black. Zoom it in for better visual understanding.
    Attached Files Attached Files

  2. #2
    Master Of The Obvious 10,000+ Posts
    Bizhub C258 artefacts, strange lines on printouts

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    Re: Bizhub C258 artefacts, strange lines on printouts

    Those would have been my choices.

    Do you get any of the original image?
    Is this a background behind the text?
    Was the sample a black-only scan, or a color scan? I suspect it's a black scan since there are no color pixels that I can identify. I would expect to see a couple color pixels ... even if the defect is black only.
    Was this page fed LEF or SEF? If it was SEF, I would try the primary charge roller first (black drum unit assy).

    =^..^=
    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. #3
    Service Manager 10,000+ Posts
    Bizhub C258 artefacts, strange lines on printouts

    Phil B.'s Avatar
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    Re: Bizhub C258 artefacts, strange lines on printouts

    Quote Originally Posted by blackcat4866 View Post
    Those would have been my choices.

    Do you get any of the original image?
    Is this a background behind the text?
    Was the sample a black-only scan, or a color scan? I suspect it's a black scan since there are no color pixels that I can identify. I would expect to see a couple color pixels ... even if the defect is black only.
    Was this page fed LEF or SEF? If it was SEF, I would try the primary charge roller first (black drum unit assy).

    =^..^=
    So many questions... so little info. Bizhub C258 artefacts, strange lines on printouts

    Sent from my SM-G960U using Tapatalk

  4. #4
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    Re: Bizhub C258 artefacts, strange lines on printouts

    Quote Originally Posted by Takhnamishvili View Post
    Hello guys.

    Bizhub C258 prints very strange black lines.

    Swapping PH unit + PH unit control board did not help;
    Swapping FRSB did not help;
    Swapping High Voltage Unit did not help;
    Swapping MFPB did not help.

    Machine has only 80K clicks on counter, spare parts life are about 50%, consumables are genuine.

    Any suggestions will be highly appreaciated.

    Check attachment. It's printed from service mode, with 0 bit black. Zoom it in for better visual understanding.
    Hi,
    This seems to be your drum unit, 80k these charge rollers start failing. Change your drum K.

  5. #5
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    Re: Bizhub C258 artefacts, strange lines on printouts

    Quote Originally Posted by Takhnamishvili View Post
    Hello guys.

    Bizhub C258 prints very strange black lines.

    Swapping PH unit + PH unit control board did not help;
    Swapping FRSB did not help;
    Swapping High Voltage Unit did not help;
    Swapping MFPB did not help.

    Machine has only 80K clicks on counter, spare parts life are about 50%, consumables are genuine.

    Any suggestions will be highly appreaciated.

    Check attachment. It's printed from service mode, with 0 bit black. Zoom it in for better visual understanding.
    I've only ever seen this once, on an i series with a drum at 40k clicks. Back before we carried the i series drums in our stock, was more of a headache to troubleshoot than I care admit. I'd say 100% drum

  6. #6
    Service Manager 5,000+ Posts
    Bizhub C258 artefacts, strange lines on printouts

    copier tech's Avatar
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    Re: Bizhub C258 artefacts, strange lines on printouts

    Quote Originally Posted by Takhnamishvili View Post
    Hello guys.

    Bizhub C258 prints very strange black lines.

    Swapping PH unit + PH unit control board did not help;
    Swapping FRSB did not help;
    Swapping High Voltage Unit did not help;
    Swapping MFPB did not help.

    Machine has only 80K clicks on counter, spare parts life are about 50%, consumables are genuine.

    Any suggestions will be highly appreaciated.

    Check attachment. It's printed from service mode, with 0 bit black. Zoom it in for better visual understanding.
    I assume before you replaced all these boards you did swap the black IU & transfer units first or at least remove & look to see it the blades are cleaning?
    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




  7. #7
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    Re: Bizhub C258 artefacts, strange lines on printouts

    Quote Originally Posted by blackcat4866 View Post
    Those would have been my choices.

    Do you get any of the original image?
    Is this a background behind the text?
    Was the sample a black-only scan, or a color scan? I suspect it's a black scan since there are no color pixels that I can identify. I would expect to see a couple color pixels ... even if the defect is black only.
    Was this page fed LEF or SEF? If it was SEF, I would try the primary charge roller first (black drum unit assy).

    =^..^=
    I have not any of the original image, this phenomenon appears only on BW prints. On color printouts there are different vertical lines.
    Yes, the sample is black only scan. Page is fed LEF. If the black drum is faulty, does it mean that I have to change it with new one? because I have already swapped Black drum unit with good working one, it gave nothing, changed black developer unit with NEW one and it gave nothing too.
    Attached Images Attached Images

  8. #8
    Service Manager 1,000+ Posts Gift's Avatar
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    Re: Bizhub C258 artefacts, strange lines on printouts

    Have you tried and clear all memory via in SP? (do a USB backup first)

    Usually I'd also say it looks related to the stuff you already swapped - perhaps you should really go with a new drum unit just in case.
    If you print in color you say it looks different? Are there still black lines or also color lines visible?

    We also had case kind of looking like this caused by the PH assy - we circled all around the problem because the image defect didn't appear "digital" to us. But you already ruled that one out...

  9. #9
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    Re: Bizhub C258 artefacts, strange lines on printouts

    Quote Originally Posted by Gift View Post
    Have you tried and clear all memory via in SP? (do a USB backup first)

    Usually I'd also say it looks related to the stuff you already swapped - perhaps you should really go with a new drum unit just in case.
    If you print in color you say it looks different? Are there still black lines or also color lines visible?

    We also had case kind of looking like this caused by the PH assy - we circled all around the problem because the image defect didn't appear "digital" to us. But you already ruled that one out...
    Thank you for your answer.

    When print in color, there are black lines but shape of them are straight, not as wavy as you can see in attachment.

    One question, what means SP?

  10. #10
    Service Manager 1,000+ Posts Gift's Avatar
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    Re: Bizhub C258 artefacts, strange lines on printouts

    Quote Originally Posted by Takhnamishvili View Post
    Thank you for your answer.

    When print in color, there are black lines but shape of them are straight, not as wavy as you can see in attachment.

    One question, what means SP?
    service program

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