Solid and in one hell of a state.. grin

The boards are all logic base. (Gates, "And, Nand, Nor, OR)
no processor. Dover's answer to Otis B Base. If you get the complete set of prints for this, it will have a logic print as well as the straight line. You troubleshoot the logic print with a logic probe, although most people now-a-days just change out the boards. Reading those Boolean logic diagrams and probing those pins with a logic probe is not a fun thing, plus it takes a hell of a lot of understanding.

You might just want to send the boards to Access and have them repair them. 301-645-1733

It Don't mean a thing if it aint got that swing.

Cool, Free, Johnny Smith courtesy of NPR..HERE
http://www.npr.org/ramfiles/asc/asc25.smith.asx