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Amp question re sound fault (feedback?)

Discussion in 'Electronic Basics' started by BG, Aug 10, 2003.

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  1. BG

    BG Guest

    I have an old PCB with an audio fault, the amp is a C1182H.

    The sound works BUT I can barely adjust the volume - it's very loud to
    put it mildly. Volume pot is fine.

    Also, if I turn the volume down very low (or at least try to turn it
    down by turning the pot in the right direction) then I get an awful
    screech/wail from the speaker. Sounds to me just like the feedback
    you'd get from a microphone and amp under certain circumstances.

    What would cause such a problem? A fault with the amp? A short

    Thanks for any advice anyone can offer
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