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  1. #1
    Service Manager 1,000+ Posts
    C6526 with error C7404


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    Thumbs up C6526 with error C7404

    I removed drum + dv unit and cleaned out spillage etc. Did not notice anything obvious with y dv unit. Reinstalled but c7404 still appears.

    Any help is appreciated. Frank

  2. #2
    Service Manager 1,000+ Posts
    C6526 with error C7404


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    Re: C6526 with error C7404

    I would say the issue is definitely the chip of the unit NOT the machine. I had a bad drum chip out of the box on that model. You'll have to replace the unit.




  3. #3
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    C6526 with error C7404


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    Thumbs up Re: C6526 with error C7404

    Thanks JR. Should I assume you are referring to dv unit as dv and drum units are separate on this machine and the C7404
    I believe is referring to y dv unit. Have little experience on this machine but what I have had has been a nightmare. I will post results if there are any

  4. #4
    Service Manager 1,000+ Posts
    C6526 with error C7404


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    Re: C6526 with error C7404

    They are separate but they both have chips and are both known to become unreadable.

    I see how my example could cause confusion. I just wanted to reinforce that the chip design can be flaky.

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