I have come across some old circuit boards and I need to find out how they work. They are switch and signal drivers made by com-serv with a copyright of 1989. This is all the information printed on the board, and I cant find anything about them online. Help please.
Wow, I think you'd have to find out who the manufacturer is and check with them.
On the other hand (there's five fingers) someone with extensive electronic know-how might be able to tell you if you show the components on the other side.
Never heard of it, never seen it, and don't know what they do. Without some kind of schematic, they are useless anyway. Unless someone here knows something about them, I'd say bin them and forget about it.