Re: Scope Settings for Sega Sound Problem

----- Original Message -----
From: "Mark Jenison" <jenison@enteract.com>
To: <vectorlist@synthcom.com>
Sent: Thursday, September 12, 2002 5:08 PM
Subject: Re: VECTOR: Scope Settings for Sega Sound Problem

>
>
> > 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
>
> To take the speech board out of the loop, jumper pin 1 to pin 3 (or 4 to
6,
> depending on which end you could from).
>
> > Sound Board
> > Pin 1 -
> > Pin 2 - NC
> > Pin 3 - NC
> > Pin 4 -
>
> Are you testing the PCB in the cage, or do you have a card extender? Hard
> to debug much if you are only able to access these pins.
>
> With a card extender, you can look at the addressing pins to make sure the
> sounds are even being invoked, and then look at each individual channel,
> then look at each of the 3 "voices" in that channel.
>
> I have some debugging information for these on my web site under
> "Troubleshooting".
>
> http://www.enteract.com/~jenison/mars
>
> --
> Mark Jenison
>
>
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Received on Thu Sep 12 20:22:50 2002