Roland System 700 clones
this Pcbs are sold around the year 2010.
I built for a client few modules. few modules was built by a other user but didn't work.
how to bugfix: https://diysynth.wiki.dsl-man.de/wiki/spaces/SKM/pages/336101402/How+to+bugfix
non commercial pages, all infos are best can do without warranty, without liability.