via this auction
"Heavy duty steel chassis, pcm technology, with efects, drums, 128 patches, aftertouch (a must have), and built in sequencer. Not at all bad for 1985"
I'm guessing there's no extensive synth editing on this one. If anyone knows, feel free to comment or let me know. My contact info is on the bottom right of the site. Note Technics actually did create a couple of full blown synthesizers, the WSA1 and the SY-1010. You can find both in the archives via the Technics label below.
Update via MiK in the comments: "Just added the repair photos to my page about this thing - which is still quite imcomplete."