Hi Mikec2003
in an EM-Pin there is no (computer) board that may get distroyed - You can manually actuate any relay in the pin - but please do not fumble on Flipper-Bats. Every relay, stepper coil should stand "1 minute of faulty constantly pulling" - You may do a test (one minute can be long time) then toggle-off the pin - let cool down. Old EM-Pins are dangerous for us people - free access to solder-lugs that may carry 6VAC, 24VAC, Bally 48VAC, 110VAC, Europe 220VAC - free access - sometimes a neat row of fuses - and the LINE (110) Fuse just there - and the Line is connected when the pin is plugged-in !!! Please wear rubber gloves (insulation) - exercise care.
A fact - what is called "Coin-Relay" very often is Start-Relay. See the JPG - my Shangri La - also quite old. Greetings Rolf