deskthority

I am trying to get this keyboard up and running. 1977 Capacitve discharge unit. I replaced the foam/mylar pads, but I have two problems. #1 I don't have the pin outs for the edge connector. I tried hooking up a logic analyzer and think I have figured out what the strobe, "Here Is" and break keys are. I am trying to make heads or tails of which pins are which bits, but right now only a few rows of keys work.

I removed the keys from the PCB since I know you can use your finger on the pads to activate a switch. Was hoping it was just a messed up keyboard matrix from one of the mylar pads messing something up if it hung too low. Wasn't it.

Before I lose my mind, was hoping someone had schematics or minimally the pin out of the 24 pin edge connector.

Thanks in advance,
Cheers,
Corey

Hi Corey,

What is the keyboard assembly out of? 1977 is pretty early. Old terminal? Maybe I have one to compare, if that would help?

I'm not sure what it's out of, I want to use it with a vintage computer that needs a parallel keyboard.

if I knew what the pin out on the edge connector was I could backtrack what's going on. Obviously schematics would be the best help.

Attached is a picture of the keyboard