Archive of the former Yahoo!Groups mailing list: Vintage Simmons Drums (UK) Users Group

Hi, my newly acquired SDS9 has developed an issue where everything is fine when it first turns on, but after very short time the toms start triggering when the snare triggers, and I start getting multiple triggering on the toms and snare when I hit a note, until at times they just start endlessly triggering. Because it doesn't happen when the unit first starts up, and increases at some sort of gradual rate, my first guess is an issue with a capacitor or capacitors. I saw in the archives that others have had triggering issues, but they were along with other issues that resulted in significant parts replacements without specifying what component might cause the triggering.  Does anyone either have a suggestion as to what specific components to check, or have a schematic that they might be willing to share?

Thanks for any help!