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How to Fisher RS-90 fix AC hum

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  1. How to Fisher RS-90 fix AC hum, How to Fisher RS-90 fix AC hum: crwdns2935265:01crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • My system emitted a very loud 50 Hz AC hum which made it impossible to hear music

    • It is caused by ground loops which occur if the receiver and the speakers have different ground levels

    • To equalize the ground levels at the back of the receiver is a screw to apply a ground cable. Fix a cable there

  2. How to Fisher RS-90 fix AC hum: crwdns2935265:02crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • Plug the other end of the cable into the ground insert of one speaker

    • The hum should disappear

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To reassemble your device, follow these instructions in reverse order.

Chris Müller

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