THANK YOU for posting the attached schematics.
I work as a bench technician and my company has 40+ of these specific units so the information is greatly appreciated. I have repaired quite a few of them but have had some that I couldn't quite figure out without more info or schematics. Some of the suspected parts also appear to be obsolete or out of stock when I search for those.
What kind of issues did you have with yours? Problems, symptoms? If you fixed it, what was it?
I'm currently working on one that just stopped working during some ESD testing some of the other engineers were performing, the control board doesn't appear to be functioning at all. Can't adjust voltage or current. Other than showing all 0's, it's basically a boat anchor currently.