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Thread: Bizhub 958

  1. #1
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    Bizhub 958

    PCQ, we have replaced drum and dev unit but still have this issueWhatsApp Image 2023-01-26 at 10.00.40.jpg

    has any one seen this before
    If at First you don't succeed remove all evidence of ever trying!

  2. #2
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    Re: Bizhub 958

    Quote Originally Posted by big jase View Post
    PCQ, we have replaced drium and dev unit but still have this issueWhatsApp Image 2023-01-26 at 10.00.40.jpg

    has any one seen this before
    its the random white dots not the lighter area , that is just engineers camera
    If at First you don't succeed remove all evidence of ever trying!

  3. #3
    Certified Konica Expert 2,500+ Posts
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    Re: Bizhub 958

    looks like repeating marks. if you roll the paper so the matching marks are on top of each other you now have the diameter of the offending item.
    We know a thing or two because we've seen a thing or two.
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  4. #4
    Service Manager 5,000+ Posts tsbservice's Avatar
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    Re: Bizhub 958

    Have you consulted with your manual image trouble section, white dots/blotched image are typically related to second transfer voltage.
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  5. #5
    Master Of The Obvious 10,000+ Posts
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    Re: Bizhub 958

    White spots can be the result of the drum arcing to the primary charge roller or to the developing roller.

    If those were new units, it should have resolved the issue. Maybe transfer roller? Did you reset the appropriate counters and do a gradation or three? =^..^=
    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 =^..^=

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    Senior Tech 100+ Posts elmaligno's Avatar
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    Smile Re: Bizhub 958

    Quote Originally Posted by big jase View Post
    PCQ, we have replaced drum and dev unit but still have this issueWhatsApp Image 2023-01-26 at 10.00.40.jpg

    has any one seen this before
    it happened to me many times. it's the transfer band.
    Field technician since 1994

  7. #7
    Trusted Tech 50+ Posts
    Bizhub 958


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    Re: Bizhub 958

    please send scanned document, to check correctly

  8. #8
    Service Manager 1,000+ Posts femaster's Avatar
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    Re: Bizhub 958

    Your image is REALLY small, so it's hard to determine for sure. My question, how over-life is the transfer belt? I have seen tiny white areas all over the solid black sections on older machines (ala 552/652 machines) when the T-belts are way over life because eventually the roller behind the belt gets a buildup on it. In this case, replacing the belt eliminates the problem.

    It can also be slightly mitigated by changing the primary transfer voltages. Personally I'd try changing the voltages and see if the problem gets worse and/or better. If it does, then the most likely issue is with buildup on that roller, so I'd replace the T-Belt at that point. Don't use the voltage adjustment to try and stretch more life out of the belt, in the end you will cause more harm than good doing that.
    A Ricoh Service Tech for 7 year. A Konica Minolta Service Tech for 7 years. Now, KM service manager for 3 years.
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  9. #9
    Service Manager 10,000+ Posts
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    Re: Bizhub 958

    Quote Originally Posted by femaster View Post
    Your image is REALLY small, so it's hard to determine for sure. My question, how over-life is the transfer belt? I have seen tiny white areas all over the solid black sections on older machines (ala 552/652 machines) when the T-belts are way over life because eventually the roller behind the belt gets a buildup on it. In this case, replacing the belt eliminates the problem.

    It can also be slightly mitigated by changing the primary transfer voltages. Personally I'd try changing the voltages and see if the problem gets worse and/or better. If it does, then the most likely issue is with buildup on that roller, so I'd replace the T-Belt at that point. Don't use the voltage adjustment to try and stretch more life out of the belt, in the end you will cause more harm than good doing that.
    AMEN!!!

  10. #10
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    Re: Bizhub 958

    this was the Transfer Belt ~140%
    Attached Images Attached Images

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