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  1. #1
    Field Supervisor 500+ Posts
    C3480 copy quality


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    C3480 copy quality

    See attached example of gradation adjustment test print. Can someone tell me what is causing the vertical lines on the Black? We have replaced the black drum unit, transfer roller and transfer cleaning unit. This is only on the Black, this scan isn't very good but the other colors don't have these vertical lines.
    Attached Files Attached Files

  2. #2
    teacher-guide-expert-guru 2,500+ Posts
    C3480 copy quality

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    Re: C3480 copy quality

    Clean the laser dustproof glass.


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    If it ain't broke, don't fix it
    A picture is worth a thousand words
    If you want something done right, you have to do it yourself


  3. #3
    Trusted Tech 50+ Posts Borsody75's Avatar
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    Re: C3480 copy quality

    Hi

    If the laser glass dirty, makes horizontal lines
    Measure the distance of the lines to count the diameter of the part which can cause the problem.

  4. #4
    Service Manager 5,000+ Posts
    C3480 copy quality

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    Re: C3480 copy quality

    Looking at your scan, is this long edge feed direction? & the lines are going top to bottom?

    Is this a genuine drum you have replaced or a compatible/rebuild kit?
    Let us eat, drink, and be merry, because tomorrow we may die!

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  5. #5
    Field Supervisor 500+ Posts
    C3480 copy quality


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    Re: C3480 copy quality

    Quote Originally Posted by copier tech View Post
    Looking at your scan, is this long edge feed direction? & the lines are going top to bottom? Correct

    Is this a genuine drum you have replaced or a compatible/rebuild kit?
    Yes it is an OEM drum unit, first thought it was faulty so ordered another and same problem.

  6. #6
    Trusted Tech 50+ Posts Borsody75's Avatar
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    Re: C3480 copy quality

    Have you replaced the ITB unit ?
    Maybe the inner transfer roller within the ITB belt for black is dirty, causing a jump on every rotation.

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