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Vox VT40+ hum issues

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  • Vox VT40+ hum issues

    Hi.
    Have this amp for repair. It uses class d bridge output to driver. I can't seem to find schematic.
    It plays sound, but has a loud hum on speaker. If I plug my headphones into phones socket its gone, but I think it just a phones type cut out for the speaker.
    Anyways, there is no hum present on phones. I have replaced the filter caps, but still the same problem.
    I noticed that R205 ceramic 5W 47ohm resistor gets quite hot, but that might be normal.
    The amp for those of you who might know these amps, has no fx send/return sockets.
    Any help will be much appreciated.
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