Hi there! Sorry to necropost, but looking for some help.
Have a Dolch keyboard that I bought w/o keycaps here from a forum member sometime back. Not sure if it came from a PAC-62 or PAC-64. It has the G80-1813HFU board inside.
I finally got a MY-1800 case to swap boards into, and while I was at it, I wanted to do a permanent PS/2 mod.
I used the Dolch diagram as shown above. Wiring to PS/2, I followed the PS/2 diagram
here, so
Dolch GND -> PS/2 Pin 3
Dolch +5V -> PS/2 Pin 4
Dolch Data -> PS/2 Pin 1
Dolch Clock -> PS/2 Pin 5
Wired it all up, checked for continuity (passed) and shorts (none), then connected! .... and got nothing. No data output, no LED response, yet voltages checked out at the pin.
Hmm... Found a cold solder joint on one of the 3 LEDs, fixed. No go. Thought I may've reversed my pinout on the Dolch board (mixing up male/female views), so I reversed them. Still no output.
At this point, I got to studying my My-1800 driver board. The boards used the same main chip, and while the PCB layouts were slightly differnt, both appeared to use the same two connections from the keyboard to the driver board: one 19-pin connection, one 8-pin connection, except that the MY-1800 had membrane housings there instead of direct-soldered like the Dolch part. So I figured I would swap them around and try again.
I desoldered the membrane housings from the MY-1800 board, cleaned up with alcohol, then desoldered the wire ribbon cable on the Dolch board that connected keyboard and driver board.
That done, I soldered the Dolch Keyboard to the MY-1800 driver board, verified continuity between points and that there were no shorts. Plugged into a computer, and still no go...
FWIW, toning out the MY-1800 connector, I was able to verify the PS/2 diagram I linked above, so at least I know the PS/2 side is ok.
So... I guess my questions are these:
(1) Are my pinouts correct, as described above?
(2) Is my Dolch G80-1813HFU just dead? (note that my soldering is quite good and I've not damaged either boards in any way/shape/form)
(3) Can these driver boards even be switched between keyboards as I've described above?
(4) If I did have something reversed, could it have just fried my keyboard drivers PCBs? - the computer side PS/2 connections still work with my other keyboards
Any help would be greatly appreciated. I'd really like to get the vintage cherry blue board up and running.
Thanks so much!