This is a video of some repairs i did on a Crumar Trilogy, here i disassemble and clean one of the organ section's linear potentiometers. it's a great synth, and nice to work on too.
This trilogy had a lot of other problems, broken solder joints, dirty switches, bad logic chips, missing keyboard parts and a cigarette burn on one of the keys. after fixing all the problems and tuning the filters it was a delight to have the opportunity to play with it.
i'm very much looking forward to fixing another crumar trilogy.
Here are the service manual and user manual.