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EMG B30(?): Knobs doing nothing

Discussion in 'Pickups & Electronics [BG]' started by cfsporn, Jul 25, 2012.


  1. cfsporn

    cfsporn

    Aug 20, 2011
    New York City
    The preamp in my Esp Surveyor II has stopped working properly. The knobs have all apparently lost their will to work. I think it is an EMG B-30, but I am not sure. I have tried replacing the battery to no avail. Any ideas?q
     
  2. Smilodon

    Smilodon Supporting Member

    Feb 18, 2012
    Norway
    Check for loose connections/bad solder joints, and make sure that the jack is working properly.
     
  3. cfsporn

    cfsporn

    Aug 20, 2011
    New York City
    Everything seems all right in the control cavity. Would it help if I posted high res pictures? And it is an EMG-B30 r3 if that helps.
     
  4. Smilodon

    Smilodon Supporting Member

    Feb 18, 2012
    Norway
    Pictures could help if it's a visible problem, yes.
     
  5. cfsporn

    cfsporn

    Aug 20, 2011
    New York City
  6. Smilodon

    Smilodon Supporting Member

    Feb 18, 2012
    Norway
    Sorry, i missed this thread.

    If you look to the far right in the pictures you have a black wire that seems to end nowhere. Does this one go somewhere, or is it a loose wire?
     
  7. cfsporn

    cfsporn

    Aug 20, 2011
    New York City
    I think that is just a ground, but I will check now.
     
  8. cfsporn

    cfsporn

    Aug 20, 2011
    New York City
    I just opened up the control cavity, and there is a black wire that goes nowhere. However, at the end of the wire, there is heat shrink tubing around the end, and no visible wires coming out of it. I am debating taking it to the guitar shop.
     
  9. cfsporn

    cfsporn

    Aug 20, 2011
    New York City
    Bump.
     
  10. Smilodon

    Smilodon Supporting Member

    Feb 18, 2012
    Norway
    Have this bass always been active, or was it converted to active?


    I'm thinking that the loose wire may be either an old bridge ground (Unlikely if the bass was originally supplied with active electronics) or it could be the ground wire from the battery.


    It's very difficult to pinpoint the error from the pictures alone.
     
  11. cfsporn

    cfsporn

    Aug 20, 2011
    New York City
    It was always active. I think I will be bringing it in to the shop. It is my favorite fretted bass, and I really miss playing it.
     

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