The following distortion pedal schematic is for the Boss DS-2 distortion pedal. Boss named this distortion pedal accordingly as it is basically a DS-1 which additional “turbo” circuitry which produces a heavier distortion. This circuit is a little more advanced than the DS-1. If you have advanced electronics skill, you could fix this distortion pedal yourself or mod it. For beginning electronic enthusiasts, I’d suggest starting with the DS-1 first.
This schematic for the BOSS DS-2 was taken from the great people over at the Free Information Society here: Boss DS-2 Schematic