Mentioned in another thread was the possibility that a manufacturer may have ground off part numbers in a powers supply. I have a servo ampifier for my Fadal mill that needs to warm up before it will work. I have replaced it with a new Glentek which is repairable because the part numbers are intact. The one it replaced has all the part numbers ground off (GRRRRR!) so there is no I know of to diagnose it. But I'm not an electronics guy. I wish there was somebody who knew about these
1992 vintage servo amps and how to repair them. I've asked around but no luck so far. A new amp is 600 bucks so if I could have mine repaired for 300 or less I would do it. Eric