Testing the Envelope

  1. Power up the main board by connecting J4
  2. Clip one end of an aligator clip to the south side of R146 (this provides the gate signal), and the other end to the exposed side of R3 on the IO board.
  3. Check the voltage on the north side of D35. It should be 12V when the clip is connected, and 0V when it isn't.