DOD switch wiring

[joesatch]

I have an FX90 pcb no case. i need to house it. i dont have the switch or led atm.  The switch connector on the pcb is reading 8 volts. the LED connector on the pcb is reading 7 volts. I have it wired up and it works but i dont know how to wire the switch and LED. how does the bypass switch work to engage and disengage the effect?  switch terminal to ground? momentary?

 

[joesatch]

i think i got it. the switch gets a momentary connection to ground which turns the effect on or off and powers the led terminal

[Mark Hammer]

Correct.

[ElectricDruid]

Hey Joe,

You don't say which revision you've got, and it seems there are several versions. Thread about it here:

https://madbeanpedals.com/forum/index.php?topic=29170.0

That said, yes, pushbutton to ground would be where I'd start. The switch acts to flip a flip-flop made out of invertors in a 4007 chip.