Re: Fw: Help Needed: Midway Space Invaders w/ no sound

I guess one more thing. I now have all the sounds working except for the
invader hit. For the invader hit I just get a high pitch sound. I'm
looking at the schematics and see that the LM3900's at M4 and M5 could be
suspect? Then, on the schematics, it shows a 4006 in the circuit, but on
the board it's a 4016. Am I looking at this wrong?

Matt

----- Original Message -----
From: "Matt Rossiter" <rossiter@ni.net>
To: <rasterlist@synthcom.com>
Sent: Thursday, December 12, 2002 12:33 AM
Subject: Re: RASTER: Fw: Help Needed: Midway Space Invaders w/ no sound

> Looks like someone replaced the fuse block and accidently swapped the
wires.
> I have sound now. Now I just have to fix a couple missing sounds. I'm
> actually surprised the wire swapping didn't do more damage. The audio
> voltage looks a little low, but the sound works and that's all I care
about.
>
> Thanks guys for the help!
>
>
> Matt
>
>
> ----- Original Message -----
> From: "Mark Shostak (DOS)" <shostak@augustmail.com>
> To: <rasterlist@synthcom.com>
> Sent: Wednesday, December 11, 2002 11:50 PM
> Subject: Re: RASTER: Fw: Help Needed: Midway Space Invaders w/ no sound
>
>
> > > Ok, I pulled out the chip and measured the voltages. The one I'm
> concerned
> > > with the most is the audio voltage which was reading around 40 volts
> now!
> >
> > Is that an AC or DC measurement?
> > Where are you reading it?
> > What kind of meter are you using?
> >
> > Is this your test cabinet or a customer's cabinet?
> > If it's yours, does a known good board set work in it?
> >
> > P.S. Send a link to the print (it's too late for fishing).
> >
> >
>
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Received on Thu Dec 12 12:17:15 2002