Vintage Synth Repair

I haven't done that much debugging yet, but when I get to it tonight I will measure the voltages. I hope I can find my digital voltmeter! I got in touch with the seller last night, and he mentioned that it was acting up for a while. Sometimes he had to turn it off and on repeatedly to get it to fire up properly. Same situation, no sound, sometimes a high pitched drone. My guess now is possibly the transformer or the voltage regulators. Any ICs that would fail cause this? How about the CA3280 VCA? I actually have one on hand here to try. It's the Intersil CA3280E.

--- In vintagesynthrepair@yahoogroups.com, "GB" <grantbt@...> wrote:
>
> How are the power supplies?
> 
> GB
>