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I have a 3M STV Digital 6 surround sound system. The receiver is emitting a loud buzz the minute I plug it in. The only way to eliminate the buzz is to unplug the power cord. Any suggestions to remedy this problem would be greatly appreciated. I have a basic background in electronics.

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A loud hum could be caused by an Earth loop. This is caused by connecting various stereo equipment into different mains power outlets.
To overcome this problem, use a power board and plug all the stereo equipment into this single power board.

Posted on May 27, 2011

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First of all, you don't identifiy the hardware.

Second, DVD 6 CH INPUT is analog so how would the device KNOW if all 6 channels are present? ONLY a device with the required 6 analog channels should be connected there. That input typically bypasses ALL internal digital processing.

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A loud buzz sound when the surround sound unit is powered on.


There is most likely a voltage regulation fault, or some filter capacitors that are going defective. It would be best to have this serviced before the parts fail completely and cause some damage.

Jerry G.

Jun 03, 2008 | Audio Players & Recorders

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