Vintage Synth Repair

OK, here we go.

First we determine if the key assigner routine works (read: if the voices
are "driven" at all).
If you look at the KLM-366 you'll probably be able to identify the voices.
Each voice has a small activity LED close to the trimmers. Do those LED's
light up with key presses?
If so we move on further: Test Point 1 (TP1) on the KLM-366 is the Signal
output. Connect a 'scope to it and see if something is visible if you play
notes on the keyboard.


(All of this of course assumes that you have dialed in a sound that
actually outputs some noise. Best use the sawtooth wave, put cutoff to 10
and resonance to 0 and switch the Amp into "gate" mode).

There is also a Polysix yahoogroup that has a wealth of information on
fixing those machines.


-- 
Malte Rogacki