Need help with a Keytronix PCB-002D

Corey986 · 28 Mar 2016, 20:34

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

snuci · 29 Mar 2016, 00:55

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?

Corey986 · 29 Mar 2016, 16:07

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