Lasonic 931 hums loud when powered on

decks&cassettes · Oct 7, 2017

My lasonic 931 has a loud hum when powered on and same humm when not powered on but you hit play on the cassette
Could it be a grounding issue ? It can be heard through the music

JVC Floyd · Oct 7, 2017

Try pressing record and play at the same time then press stop. Repeat this step about 10 times then check it , also flip the ac/ DC switch a few times.

Transistorized · Oct 7, 2017

Also try with DC power versus AC power. Could be your filter capacitors drying out in the PS

decks&cassettes · Apr 1, 2018

Thanks guys will give both suggestions a go tomorrow

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Lasonic 931 hums loud when powered on

decks&cassettes

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JVC Floyd

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Transistorized

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decks&cassettes

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