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Hi, I recently had this bass effects pedal worked on. unfortunately, the technician clipped off the wires from the expression pedal to the board, so, now, the pedal doesn't do anything. I need to rewire it. Please send me a schematic diagram for it, or just let me know where the wires need to be soldered onto the circuit board. Thank you,

Posted by Marty Baris on

  • Marty Baris Feb 12, 2011

    Thanks for your answer. I'll make sure to try it out. I've, also, contacted Zoom for a schematic, so I might wait for that before attempting any further repairs. Oh, that tech has been fired - more like, I'll never take anything to him for repairs.

    Thanks, again,

    Marty

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Fred Yearian

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Who knows what brand pedal you have... and there are many. The schematics for these are USUALLY not available... however, usually one can use their head and effect a repair.

FIRST, it is unlikely if you have three clipped wires that you can do much damage by connecting them wrong to the three terminals of the expression potentiometer... there are ONLY six ways to connect the leads. If the pot goes into a digital signal processing thing there is a chance that it is really a voltage divider of a voltage reference and we COULD possibly damage the pot in that case... so let's be smarter:

Where the leads attach to the circuit baord are LIKELY in a pattern of three pads in a row and you should have witness marks of where the leads were clipped... by the way, fire that technician...

Usually the center pad will go to the center of the pot leads... Then you only have two left... get them backwards and the pedal will be backwards so you can just swap them. Try this method and see if it works... If you haven't fired the tech yet, don't forget to...

Posted on Feb 12, 2011

Testimonial: "Thank you! He's fired! I've also contacted Zoom for the schematic. I think I'll wait for that before I try any repairs, but I think you're correct."

  • Fred Yearian Feb 13, 2011

    See if this might be your pedal service manual... there is also a G1 pedal at this site.
    http://elektrotanya.com/zoom_b1.pdf/down...

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