Although I hardly use my SD-1, due to my GT-8 having all of the overdrive settings I could possibly want, it was still annoying me that I had a faulty pedal sitting on my shelf. The problem I was experiencing was that the SD-1 was constantly stuck in its on position – Stomping on it did nothing but continue with the overdrive.
After taking it apart and hooking it back up to some power, a guitar and an amp, in its disassembled state it was working fine – Reassemble and the fault reappears. It was instantly obvious that something was shorting out against the metal casing. You’d have thought that there was some form of non-conductive coating on the base-plate – Maybe there is, but defective near the switching area of the circuit. Covering the base-plate with insulation tape fixed the issue and it’s now working perfectly again!
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