On 09.07.17 11:51 , Jean Bender wrote: > I can't find schematics, sorry.. Hope it's clear. http://www.synfo.nl/servicemanuals/Roland/RS-09_V1_SERVICE_NOTES.pdf http://www.synfo.nl/servicemanuals is like the alexandria bibliotheque for Roland synth manuals. (don't forget to donate to Senso).