It has been my experience, if you contact Stetsom and explain the issue you are troubleshooting they have been pretty good about sending a partial schematic that focuses on the circuit. Send them an email today and by Monday afternoon you should have a response.
Start your own thread and I might be able to assist, along with others. I recently had to revive my EX3000EQ that just stopped turning on. There were many things that I had to check and I, and others, can only tell you these things on your own thread.