I did the test and here is my report:I am going to do a test today with the jumpers, but if the VCAs were bad(or at least the one in the sidechain), which it sounds like they should be, shouldn't the unit not be compressing and the ratio / attack / release all not be working? Maybe I misunderstand the circuit?
When jumping pins 1 and 8 on the left and right VCAs, the compressor still behaves as normal in terms of meter reading etc, but there is no sound output still.
When I do the same jumper test on the sidechain VCA, the meter no longer behaves normally. I think this answers my question that the metering would not work with a faulty VCA, so does this mean my VCAs are actually OK, is there any other way to test?
Moving forward for next steps, I notated that pins 1 and 8 on the left and right VCAs are all seeing around 7 volts (the other 6.8).
Let me know what else I can test to narrow down where the signal goes bad!
Thank you so much