Replacing old transistors in the tone control board and the pre amp.
A step by step look at me repairing my JVC VN 300 Amplifier.

Thanks to "Hugo Bloemers" for pointing out that transistor X701 a 2sc711 is part of the soft clipping circuit.

Transistors replaced in the tone control board were 2sc458 which I replaced with 2sc1815
and the Transistor I replaced on the main board was a 2sc711 which I replaced with a bc548

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