Re: Rotel RA-930AX - right channel down
If the "front switches" have been proven to resolve the problem (at one time), then they're very likely still the problem. Dirty switches can be a tough nut to crack, you may have to repeatedly clean them/it and even then the switch may not be making good contact due to a purely mechanical, poor contact issue.
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A digital radio is the latest thing, but a vintage wireless is forever..
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