VECTORLIST - The Mailing List For The Technical Discussion of Vector-Based Arcade Games

March_1998
Re: Board tester board...


From: Mitchell Rohde ( )
Date: Tue Mar 03 1998 - 09:30:43 CST


> > Try filtering the 10.3V supply some more, first....this sounds
> > like (no pun intended) noise on the 10.3V supply, which is unregulated,
> > and goes to both tthe CP and the audio amp.
> >
> > Joe
>
> I've noticed that different Asteroids boardsets in the same cabinet
> produce these same beats in sequence with the blinking LEDs on the
> control panel. I.E, depending on the boardset I've tested, it has
> either exhibited this phenomenon or not. Strange, no? (Strange yes!)
>
> Joel-
>
 Er... not really that strange. The pulsing is undoubtedly the same
because they are driven from the same power supply with not enough
filtering... if you can see the lights all dim and get bright in phase
with each other, I'd say the problem is pretty bad... :) put some caps on
that circuit!

                                Mitch


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