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Yamaha RXV363 receiver shuts down every time when a loud DVD movie is played. It has only shut down oce or twice with a loud Directv movie. The cabinet the receiver is in, has about half an inch clearence around the receiver. I installed a small fan (5 in. blades) to blow across the receiver to help keep it cool. Would excess heat cause the reciever to shut down?

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  • wille4d Aug 29, 2010

    Yes, but I wish I had been able to chat. I not quite sure I understand the term "source".

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Yes, heat could easily force a sudden shutdown of the receiver, but i don't think this is your case here - the volume of the sound should be very high, for a long period, to overheat the unit this much. Installing an extra fan and lowering the master volume should fix it. If it doesn't then my guess is most likely true.
My guess is that all of this has a different cause: when the sound spikes the amplifier is overstressed and draws a very high current from the source (or at least is trying to); the source of the receiver can't deliver it so the output voltage drops; the protection inside the source reads the drop as caused by a short and shuts down the source = the receiver shuts down.
The power source must be checked and the aged parts (the capacitors mainly) must be replaced.

Posted on Aug 26, 2010

  • Azrael SRL Aug 29, 2010

    Source, as in Power Source - the component that transforms the mains power (120volts AC) into the DC voltages needed by the components of the receiver.

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