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  1. #1
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    Bizhub: light lines, bars on low intensity Black prints. [see scans]

    I've solved the C,M problems from this thread: Bizhub: Cyan, Magenta don't print nor mix at all below 60% intensity [see scans]
    by replacing the transfer belt.

    However, what I've found now are those lighter stripes that show up on Black toner prints. What you're seeing here is a 50% black color.
    With 100% color only the uppermost line is barely visible.
    doc01531920231201130059_001.jpg

    I have two B drums for comparison and both drums show the same lines in the same places. So, I guess it won't be the drum.

  2. #2
    Service Manager 5,000+ Posts tsbservice's Avatar
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    Re: Bizhub: light lines, bars on low intensity Black prints. [see scans]

    Did you clean the laser by wand? Sometimes it is even advisible to remove laser unit(PH unit by KM) from machine in order to clean it properly.
    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.

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    I don't reply to private messages from end users.

  3. #3
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    Re: Bizhub: light lines, bars on low intensity Black prints. [see scans]

    Quote Originally Posted by tsbservice View Post
    Did you clean the laser by wand? Sometimes it is even advisible to remove laser unit(PH unit by KM) from machine in order to clean it properly.
    Yupp. You got it right, sir. Thank you very much.

    What it was, was some very stubborn dirt that I had to clean several times (around 20x).
    Also, I've used a micro-fibre cloth wrapped around the wand and I'm seeing an immense progress.
    There is still one line so I might need to remove the laser unit, as you've proposed.

    Thanks again.
    All the best

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