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  1. #1
    Junior Member
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    Dead potential sensor

    Hi everyone,
    I have a dead potential sensor o bizhub 6500. New part is coming in 7 days and i wonder how can i adjust
    the mashine manually. (auto gamma adjust, calibrate colors etc)

  2. #2
    Master Of The Obvious 10,000+ Posts
    Dead potential sensor

    blackcat4866's Avatar
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    Re: Dead potential sensor

    I used to use this procedure on high volume Canons when the potential sensor failed.

    I specifically remember how in class, the instructor told us how sensitive the potential sensor is. So when I had a high volume machine with a dead drum potential sensor and a week to wait, I took a chance.

    On these machines you could always turn off potential control, and the machine would use certain default values that were close enough to get a decent copy. So I had a fallback position if it failed.

    After cleaning the DPS several times to no effect, I rapped it smartly with the back of my screwdriver. If you're so darn sensitive, take that! To my surprise it worked for a week until I returned with a replacement. It's worked on at least 6 occasions on various Canon models, for varying periods of time. As little as a few hours ... up to 2 weeks. =^..^=
    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
    Senior Tech 250+ Posts Mick01's Avatar
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    Re: Dead potential sensor

    You can try this temporarily which may get the machine operational until you replace the sensor
    Turn switch 24-2 to on
    Turn switch 25-3 to on
    Turn switch 25-4 to off (should be off already but check)

    This should temporarily disable image process and colour registration control.

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