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Acoustic B20 wiring diagram

Discussion in 'Amps and Cabs [BG]' started by music4fun, Feb 2, 2013.

  1. music4fun


    Nov 20, 2012
    HI, I need the schematic for the B20, my husband can fix it if I had this. The fuse keeps blowing, he checked all he could without a diagram. If we unplug the transformer the fuse doesn't blow so it must be something on the circuit board. Hate to throw amp away, but not worth sending in to repair.
    thanks a bunch. Any repair ideas would be great.
  2. justjcarr


    Apr 17, 2013
    Check your capacitors. The two larger ones on mine went bad. You can tell they're bad if they're bulging on top.
  3. BassmanPaul

    BassmanPaul Gold Supporting Member

    Aug 25, 2007
    Toronto Ontario Canada
    Very likely the output devices are toast. they'll need to be replaced. the outputs will be obvious unless they are an integrated power amp chip.