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does not work

  1. K

    Yamaha AX-500 treble and bass knobs does not work

    In my Yamaha AX 500 amplifier, when I turn the bass or treble knob, nothing happens. I wonder if it's the fault of the potentiometers, but I think it may be the fault of the 'Tone Bypass' button. When I click the tone bypass button, nothing happens, there is no noise or any signal distortion. CD...
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