Boss SD-1 - Unintentional Apocalyptic Fuzz Mod

Forum dedicated to helping people debug and troubleshoot non-functional pedals or builds. Please use an clear and informative title, indicating circuit and basic problem. Don't forget to mark the issue as fixed if this is the case.
Post Reply
User avatar
OrsomeWells
Information
Posts: 2
Joined: 31 Mar 2013, 11:18

Post by OrsomeWells »

Hi all,

I recently decided to try modding my Boss SD-1 with a couple of simple mods.

Firstly I removed C6 and everything was fine so I decided to try removing and jumpering D6 to see how it would sound with symmetrical clipping.

Unfortunately the result is insanely high levels of fuzz (almost square wave) that can not be controlled by the drive pot (VR1) :slap:
The fuzz is present if I remove the jumper across D6.

I've performed a visual check and I can't see anything obviously wrong but I'm quite new to debugging pedals so not quite sure what I should be checking.

Would I be correct in thinking that breaking the -ve feedback loop could cause these symptoms? :scratch:

User avatar
OrsomeWells
Information
Posts: 2
Joined: 31 Mar 2013, 11:18

Post by OrsomeWells »

Panic over.

When I de-soldered D6 I broke the solder link on the underside of the PCB which links D6 to R7.

Oops.

:oops:

Post Reply