Home › Forums › Vintage EHX › Need wiring help for Little Big Muff Pi with EH-3003 circuit board

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  • January 22, 2012 at 3:07 am #82129
    jorlitta
    Member

    I am hoping that someone can help me out. About 32 years ago, my Cousin accidentally pulled some wires off of the circuit board on his Little Big Muff. His Father had no idea where any of the wires were supposed to go, so he could not repair it. My Cousin didn’t want it anymore, so he gave it to me, being that I showed an interest in repairing it someday, somehow. If someone can help me out with some original photos of the wiring on the EH-3003 board for the Little Big Muff, or a wiring schematic for it, I would greatly appreciate it. Thank you.

    January 22, 2012 at 12:48 pm #116830
    jorlitta
    Member

    I stumbled across this image during a search for the circuit board. All of the wires are the same color, but at least it’s a reference. the only problem is that I can’t determine which wires go to the tone switch or the stomp switch from this photo. I’m assuming that the red and black wires are for the 9 v battery connector. Here is the link to the image:

    http://www.pedalheaven.com/fx-info.php?picture=1781

    Here are two photos of my circuit board, in it’s current condition. Any info that you can provide in regards to the re-wiring of this board will be greatly appreciated.

    Thanks,

    John

    http://s017.radikal.ru/i436/1201/d8/e5a074ec7d70.jpg
    http://s54.radikal.ru/i145/1201/76/450326adf073.jpg

    January 28, 2012 at 3:02 am #116867
    jorlitta
    Member

    Also,there are two capacitors that need to be replaced. One has 068K50 printed on it, which I think is a .06 pf capacitor with +- 10% tolerance, and the other one has 104KA printed on it, which I believe is a .10 uf capacitor with a +- 10% tolerance. Can anyone tell me if I got the values correct? I looked at some charts on several sites to try and figure them out. And, where could I find them? Mouser and Digi-Key seem to have an extensive supply, I just want to get it right before I commit to a purchase. Thanks.

    http://s018.radikal.ru/i519/1201/6d/6155b8b566c6.jpg
    http://s57.radikal.ru/i155/1201/91/2f1938f1ac44.jpg

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