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Marshall AVT275

Discussion in 'Electronic Repair' started by N_Cook, Mar 18, 2011.

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  1. N_Cook

    N_Cook Guest

    The front controls board is held to the chassis with standoffs held by push
    fit ends into holes in the pcb. Then bush nut free pcb mounted pots and push
    on knobs. Has anyone experienced the board dropping away inside. If the
    limpet knobs work loose and then a bit of heavy handidness or knocking, the
    pcb board will pop off.
  2. N_Cook

    N_Cook Guest

    Clouting knobless pots on this would guarantee the board dropping away
    All that holds the board ,then, is 8 quartered pips into the 8 pcb holes ,
    easy finger force to release .
    Does make it a doddle to remove the pcb for repair, none of those awkwardly
    placed triangular catch pieces or screws etc
  3. N_Cook

    N_Cook Guest

    Nothing amiss here either , this pcb not having been dislodged even
    partially. I've never seen this approach used anywhere else. I could not
    decide whether it was a neat idea or an accident waiting to happen. Just
    measured one of these "anchors" , about 5 pounds to dislodge one stand off ,
    so x8 for the whole 15 x 3 inch board, once the knobs were loosened/shifting
    along the spindles.
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