Scope Settings for Sega Sound Problem

I'm trying to debug a Star Trek cockpit with no sound.
There doesn't appear to be anything coming from the sound
board. But, I'd like a quick sanity check from you guys
if someone has the time.

What should the scope settings be?

What levels should I see on these pins while sequencing
through the sounds during self-test? Maybe there's a
better method for troubleshooting? Thanks for any advice.

 Speech Board
  Pin 1 -
  Pin 2 -
  Pin 3 -
  Pin 4 - NC
  Pin 5 - NC
  Pin 6 - KEY

 Sound Board
  Pin 1 -
  Pin 2 - NC
  Pin 3 - NC
  Pin 4 -

 PS Audio In (from volume ctrl)
  Pin 1 - NC
  Pin 2 -
  Pin 3 - NC
  Pin 4 -

 PS Audio Out
  Pin 1 - NC
  Pin 2 -
  Pin 3 - NC
  Pin 4 -

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Received on Thu Sep 12 16:28:45 2002