Technics SE-A800S Power Amp Buzzing on Standby

Discussion in 'Hi-Fi Stereo Systems & Separates' started by ollieeeee, May 14, 2018.

  1. ollieeeee

    ollieeeee
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    Hi everyone,

    I recently obtained a Technics SE-A800S power amp & SU-C800U combo. It works ok, but when I click standby on the power amp it starts this nasty buzzing sound which really doesn't sound healthy. I have put a link to a video of the problem that I recorded.

    [youtube]qmaAPHDCT[/youtube]

    Any help would be greatly appreciated - thank you.
     
  2. ollieeeee

    ollieeeee
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  3. dannnielll

    dannnielll
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    At what volume level ??? . If it occurs when there is no load at all then it is the power supply trafo free cyclng and while irritating, is not serious . The problem typically is that the windings on the trafo are not rigidly embedded and they vibrate the principle is called magneto -striction. If it is very irritating, you can open the lid and listen to find the coil. Then a bit of silicone rubber sealant should dampen it a lot..
    Another possibility is a loose metal plate adjacent to the trafo and caused to vibrate, again a blob of silicon will sort it out.
     
    Last edited: May 19, 2018

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