Vintage Synth Repair

>>I'm thinking there is a problem on the digital board but my experience with digital electronics is limited... <<

james, do you have a schemo? are you able to tell if the d>a converters are functional? does the source have a midi kit installed? does it respond to cv/gate input? can you find a signal at the output of the filter? try turning the resonance right up & see if a signal appears before the primary vca. I will have a look at my own scemos, see if I can think of anything else. one of mine used to do something weird when it had a midijack converter in it- sometimes the pitch would go supersonic. I took the damn thing out & the moog's fine now. :-)

duncan.