Spring Reverb Turns On By Itself!

Discussion in 'The Workbench' started by hamminhaw, Feb 20, 2019.

  1. hamminhaw

    hamminhaw New Member

    Feb 20, 2019
    Likes Received:
    I have a Marshall DSL401 40W combo. Recently I've had to unplug the amp's reverb unit because after a few seconds of playing the reverb becomes fully engaged no matter what position the reverb knob on the front panel is in. I can still adjust the reverb level with the knob but after a few more seconds it becomes fully engaged again. I've searched multiple forums/websites but couldn't find anyone who had this problem. Anyone here have a solution?
  2. ampmadscientist

    ampmadscientist Well-Known Member

    Jun 26, 2014
    Likes Received:
    Left Coast
    Clean the reverb pot (spray cleaner inside of he pot).
    Use a lubricated non conductive cleaner, Deoxit G 100, D 100, or LPS-1.

    The reverb pot could also have a bad solder connection on the circuit board.
    Resolder the pot, and that will fix it if the connections are cracked.

    The reverb pot itself could be physically broken. (inspect the pot)

    But usually, it's only cleaning as above that fixes the pot, usually not any more than that.

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