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Fishman SA220 Problem

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  • Fishman SA220 Problem

    Good morning

    I have a fishman sa220 on the bench.. Customer didn't connect the jack or XLR into correctly and during the show kept turning it up and up and when he realized what he did he he pushed the connector in the the pa speaker came to lige

    Even since then you power it up , when you turn it up high. It cuts out.... but the horns are still working , .....turn the volume back abit the speakers cut back in.
    I have no schematic for this , I have contacted fishman, but don't expect any help with the schematic

    Its not a intermittent pot, type fault,
    Changed the power chip LM3886T
    Tried with my test speaker still the same
    Monitored the two regulators on the board while it cuts out. All stable

    Click image for larger version

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    Click image for larger version

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    Any thoughts ?

    Have a good day

    Many thanks in advance

    BBB
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