Quote from: J M Fahey on April 25, 2013, 11:51:12 AM
That's what Enzo means :cheesy:
The "schematic" is a footswitch shorting or not an 1/4" guitar plug.
What's the FSW supposed to switch?
Channel/dist/gain/boost/reverb?
Plug a stereo plug into the FSW jack and alternatively ground one or the other terminal (tip or ring) with a piece of wire ... any change?
Once you've confirmed this, the pedal wiring is using 1 (or 2) switches to duplicate the shorting previously tested "by hand".
EDIT: *some* pedals are more complex than that, such as Fender, which have internal Leds and a diode matrix so 1 wire controls 2 functions (clever) but afaik "small" Marshalls use simple generic switches.
Now, say, the one in an MF350 uses a 15 pin connector, multiwire cable, has some 5 switches , Leds, etc. ... but thanks God it's not the case here.
no its suppose to switch between clean and dirty channel