Fuzz Face Clone Stopped Working - Any Help Appreciated

[Marcos - Munky]

It didn't worked because the switch board is made for a negative ground circuit, while you're working with a positive ground circuit. A negative ground circuit expect the voltage input in to be bigger than ground voltage. If we assume the voltage value is 9V, we have to keep in mind the voltage is actually the difference of voltages between two points. So a 9V negative ground circuit means the voltage input have 9V above ground voltage. If we assume ground voltage is zero, then voltage input will be +9V. On the other hand, a 9V positive ground circuit is the opposite of that. Ground is 9V above the voltage input. So, if we assume ground is 0V, the voltage input is -9V. Or, if we assume the voltage input is 0V, ground is +9V. That means...

To make it work with this switch board, you have to:
a) connect the 9V from the switch board to the black wire on the circuit board and gnd to the red wire, and use a negative center power supply. This way, you'll be "sending 0V" to the voltage input and "sending 9V" to ground, and ground will be 9V above the voltage input. But you have to use an isolated power supply, or else it won't work.
b) connect the 9V from the switch board to the red wire and the gnd to the black wire, but reverse the wires directly on the power jack. Same thing as above, and again you need an isolated power supply.
c) connect the 9V from the switch board to the red wire and the gnd to the black wire, keep the power jack wiring as it is, but use a positive center power supply.
d) fix the voltage inverter board (just remove the ic and put in a new one) and wire it as before. This way, you can run the pedal using a non isolated power supply.

For the layout used, you can just ask the person who built the pedal. Anyway, we still need the voltages on all pins of both transistors to check what's going on. But you have to fix your power supply wiring before measuring the voltages.

[pinkjimiphoton]

gotta 9v battery? screw the inverter board. just connect the battery across the rails to see if the circuit will fire. red to GROUND, black to "hot" in this case.

munky's right, your neg volt daughterboard appears to be fried