hello out there!
I have 5 SDS-1 drum units and none work properly. I've managed to get some sounds to play on 2 of them but they appear to work differently. The others are more or less dead.
I believe I can troubleshoot them if I have a schematic of the unit. I have a scope, DVM and tools and am pretty good with a soldering iron. Maybe a schematic can be added to the Manuals section in Files... It would sure help me out and probably some others!
Best Regards
Lou