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  1. #1
    Senior Tech 250+ Posts
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    sp c242sf density sensor

    I have a SP C242sf and it is constantly requiring me to clean the density sensor. I open it up, slide the little blue arrow, clean it, shut it, it goes away, but then eventually it comes back up. Any reason why it keeps coming up? Is there like a reset code you have to perform on it?

  2. #2
    Service Manager 5,000+ Posts
    sp c242sf density sensor

    copier tech's Avatar
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    Re: sp c242sf density sensor

    I had this exact same problem, so manually cleaned the sensor with a can of compressed airi
    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




  3. #3
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    Re: sp c242sf density sensor

    Quote Originally Posted by copier tech View Post
    I had this exact same problem, so manually cleaned the sensor with a can of compressed airi
    Did that do it for you? I have also done that

  4. #4
    Service Manager 5,000+ Posts
    sp c242sf density sensor

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    Re: sp c242sf density sensor

    Yes, but maybe theres an option to turn off that message in user tools also?
    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




  5. #5
    Field Supervisor 500+ Posts Counsel's Avatar
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    Re: sp c242sf density sensor

    If its bad enough I usually pull the pcus, remove the ptr deck, remove fuser, take out the transfer belt unit and clean the od sensors with alcohol on a Qtip, vacum the machine real good, empty the waste bottle etc. I also proper replacement of PM parts when at yield such as the transfer belt/cleaning unit help keep it running cleaner. I really did care for these models much the pcus would not last as long as they should and the fusers would go out often.

  6. #6
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    Re: sp c242sf density sensor

    This error is due to laser unit, clean it or replace it

  7. #7
    Retired 10,000+ Posts
    sp c242sf density sensor

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    Re: sp c242sf density sensor

    Sounds like you need to be working on the toner scattering problem you have from using after market toner and developer.

  8. #8
    Trusted Tech 50+ Posts
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    Re: sp c242sf density sensor

    NO issue with the toner actually dust particles gets enter in the laser optics which should clean carefully or replace it without disturbing the mirrors.

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