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Thread: Theta Dreadnaught +Rail fuse light on

  1. #1
    Senior Member
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    Mar 2011
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    Theta Dreadnaught +Rail fuse light on

    Hi
    This just came on and lost all sound.I was wondering if anyone had this happen before.I also hear a small transformer hum.I am in Toronto area so I will not ship this amp to Cal.
    I am not sure of a local Theta repair depot but I am also no dummy for a easy repair.
    thanks john

  2. #2
    Member Sponsor [Technical Expert] DonH50's Avatar
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    Jun 2010
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    After checking there is not a speaker wire shorted, you could start by replacing the fuse and seeing if it blows again. If so, then you'll have to troubleshoot to see what went out.
    Don Herman
    "After silence, that which best expresses the inexpressible, is music" - Aldous Huxley

  3. #3
    WBF Technical Expert (Speakers & Audio Equipment)/Member Sponsor [Technical Expert] garylkoh's Avatar
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    Sep 2010
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    Seattle, WA
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    5,130
    I used to have a Theta Dreadnaught - it had two fuses: one on the +ve rail and another on the -ve rail. If the +ve rail light is on, the +ve rail fuse is blown. This can happen for a variety of reasons. Remove all speaker cables, and replace the fuse and turn it back on. If the fuse stays good. Make sure there are no shorts in the speakers, and then try hooking up the speaker cables back and turn it back on again.
    __________________________
    Gary L Koh, CEO and Chief Designer,
    Genesis Advanced Technologies
    I am format agnostic, a full-time music-lover and a part-time audiophile. I listen to as much digital as analog, and I work hard at hunting down the best sounding copy of the music I love. Most of the time, I prefer the analog when both are available. But *sigh!* having had the chance to listen to a 1/2-inch 30ips mastertape, I also know what's left on the cutting room floor.

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