Question about Yamaha RX-V793

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When turning the volume up to the mid level spot on the dial the power on my yamaha rx-v793 clicks off. Apon turning the power back on,the unit will stay on as along as the volume is below the mid range. Since the unit is stored in an enclosed stereo cabinet I beleived that it might be over heating and it was certainly quite warm. I allowed the unit to cool over night and tried the volume setting while it was cool and the same thing happened. I also removed the cover to see if the fan was functioning and to clear any vent blockages. Everything seemed clear and although the fan did not come on most likely due to the cool temp, the unit shut dowm immediately when raising the volume to the mid range area. Also the I did not notice any distortion to the sound quality at any time. thanks TH

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  • tfhealy Jun 18, 2009

    Thanks I will give this a try this weekend.
    Thanks again


  • tfhealy Jun 23, 2009

    I found a crack in the wire covering of one of the speaker wires.
    Once repaired the problem was solved. Thanks for the advice it worked perfectly.
    TH


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  • Yamaha Master
  • 1,114 Answers

Check your speaker connections, the unit is shorting out. Best way to make sure it's not the receiver is to disconnect all speakers then turn on your receiver,turn on a source like cable or dvd and turn up the volume on the receiver. If it stays on, you know it's not a problem with the receiver.

Now to find the problem; re connect speakers one by one, each time, turn on the receiver and turn up the volume, when you get to the wire causing the problem, it will shut off. At this point, disconnect the speaker wire at the speaker causing the problem to make sure it's not the wire itself. Make sure the loose wires do not touch each other as this will cause the unit to short or worse! If it still plays, then look at the speakers internal connections if possible. Look for the obvious, burn marks on a crossover or wires touching, if you find none, use a multimeter if you know how to read one and set it to resistance. If it reads 1... you've got a bad voice coil and the speaker needs to be replaced. Most often, however, is that a partial part of a speaker wire braid has touched the other. + to - and does not have enough of a load to short out until you turn up the volume. The other scenerio is if your wiring was "pre-wired" in your home for surround and there is a nail or screw in the wire and doing the same thing. If you still have issues beyond this, post a comment and I will help some more. Hope this helps

Posted on Jun 15, 2009

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