I've been in touch with a guy who has an archive of reverse-engineered schematics, including for Mac IIsi and its PSU. I've told him I'm a restorer and he is willing to provide, but only by paper post and to a postal address in USA.
If any other IIsi owner wants these and has a US address, please PM me and we can see what's possible.
Rick
If any other IIsi owner wants these and has a US address, please PM me and we can see what's possible.
Rick