I have only one keyboard made by SORD, and that is for the M323SX-III. I am hoping that by analyzing this keyboard, I will be able to gain some insight into the keyboard mechanisms of other models.
Microcomputer, RAM, and ROM are also implemented. It constitutes a small microcontroller system.
The figure shows the pinout of the keyboard connector (front view), where Vdd is connected to the 7805 input inside the keyboard board. The keyboard connector is a DIN 8-pin connector, but it seems to be type b, which is very hard to find. The DIN 8-pin socket I bought from Marutsu Radio in Japan did not fit this connector.
