If the regulator is not potted, and you have some soldering skills, it is probably repairable. It’s usually either dried out electrolytic capacitors or power devices (transistors, etc) that fail. Resistors sometimes burn up, but those are usually easy to spot visually. For a repair, just replace the suspect parts (all electrolytic capacitors, all power transistors) and give it a try. Probably less than $20-30 in parts. Don’t even bother trying to diagnose anything. A lot of times a rebuild like this will fix things.Hello
Thanks for the info. I will pass it along
Will keep looking for more info.
not good news on the regulator being hard tpo find.
I would think so too, but I’ve seen some boards in old control cabinets that either had no coating, or the coating was damaged. I’m not sure what would strip the conformal coating off of old boards, but I’ve seen it before.I'm pretty sure these boards had a similar coating when new, but the components just got old and gave up.