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Erratic volume from new turntable thru used amp


Just bought used amp. volume fades then comes back by itself. sometimes happens every few minutes. sometimes no problem for 1/2 an hour or so. sometimes some static . only two front speaker channels work. turntable and speakers work OK with a different system. turntable is only component connected to amp.

Posted by Anonymous on

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  • Anonymous Apr 17, 2010

    I returned the amp (Tehnics su-g75) to pawn shop. They told me volume change caused by using surround sound setting with only the two front speakers connected. They also told me that I had fried one channel when I connected the speakers with the power turned on. They gave me another amp that works fine. No extra charge so problem solved. Thanks for responding.

    macr590

  • Anonymous Apr 18, 2010

    See comments added Apr. 17. Problem solved. Thanks.
    macr590

  • Scott Frye
    Scott Frye May 11, 2010

    Hi... What model amplifier is it?

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Scott Frye

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Glad to hear you got things worked out

-Scott

Posted on Apr 18, 2010

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SOURCE: erratic volume from new turntable thru used amp

First detirmine if it is only the turntable that is causing this problem, by connecting something else to another terminal. If that works fine it will be the cartridge preamp that is causing the problem. From what you describe it sounds like an IC that is playing up.
If the other device plays up as well as the turntable, I still suspect an IC, but this time in the main pre-amp. The reason I suspect an IC is that by the sound of things both channels are playing up and therefore it has to be somepart that has both channels going in and out of it- thus IC!

Posted on May 10, 2010

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Erratic volume from new turntable thru used amp


First detirmine if it is only the turntable that is causing this problem, by connecting something else to another terminal. If that works fine it will be the cartridge preamp that is causing the problem. From what you describe it sounds like an IC that is playing up.
If the other device plays up as well as the turntable, I still suspect an IC, but this time in the main pre-amp. The reason I suspect an IC is that by the sound of things both channels are playing up and therefore it has to be somepart that has both channels going in and out of it- thus IC!

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I'd agree that it is none of your hardware if it affects all inputs, two receivers and multiple speakers.
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The simplest source to use for further trouble-shooting would be FM as it has no external connections, and it's vanilla stereo. Keep It Simple.

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