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No sound nothing out of speakers. I have isolated and pre-amp circuitry is fine.

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  • drummy66 May 23, 2008

    my receiver is a yamaha r2000, circa 1981

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What brand is your amp, model.

Posted on May 22, 2008

  • Redentor Rivera May 23, 2008

    you have a defective power output transistors... you have to get it repaired by yamaha if they will still accept the model. they might tell you parts no loneger available. but parts can be found else where out of yamaha. it could cost a lot though. better consider buying a newer model.

  • Redentor Rivera May 23, 2008

    try

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The relay sounds as if it is controlling the "mute" circuitry. If you power down the relay there is no power to the speakers. When you pull it out it is the same thing as putting it in the open position.

Just for giggles, leave relay in, before turning on, unplug your speakers, volume all the way down. Now "mute" the device. first plug the speakers in, if fuse is not blown, try adding a little volume.

With the speakers and volumke down, there is little or no current dfrawn from the amplifier section. If the device blows a fuse this time, I suspect the amplifier control voltage circuitry is bad.

If blown when attaching the speakers, susoect the amplifier circuitry.

Of dourse this does not take into account a good ol' short on the board. This would just mean that the short is AFTER the relay or there is a possibility that the relay control circuit is causing this.

There are multitude of diagnostics for a pre-amp/amp combo and either way, if your not a technician, it needs to be taken some place for proper diagnostics.

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