Oh my, this is just as confusing as my original instructions. Did you wire up the "S" terminal to rotary switch? Without that, I don't think there will be output.
You can get ground anywhere on the board (any of the RCA jacks) or the hole next to "V". See bottom of PCB to look for connections to ground plane. See also the assembly photo downloadable from the web page.
Measure power to board using DVM. Easy to check power pins of ICs. LED has to be wired correctly with "+" to "DA".
jh
