This early unit (#242) needed some further work after another tech had worked on it. The keyboard had been re-bushed, but the bushing supports had not been straightened, which coupled with some badly stretched key return springs had left it unplayable. This was resolved, and once the set-up was completed (it had been tuned from C on the far left when in fact the first key is an F!) it played great (taking into account the temperature drift you get on a version 1 oscillator card!).
via This Old Synth – Vintage Analog Synthesizer Repair Portfolio Page.