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

From: Rodger Boots <rlboots_at_cedar-rapids.net>
Date: Thu Dec 12 2002 - 13:44:35 EST

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Matt Rossiter wrote:<br>
<blockquote type="cite"
 cite="mid00e801c2a200$bb9d40a0$84efaa40@mrossiter">
  <pre wrap="">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
  </pre>
</blockquote>
<br>
The schematic is wrong. &nbsp;It should be a 4016 (or 4066). &nbsp;I had to think about
that for a while when I saw it too.<br>
<br>
<blockquote type="cite"
 cite="mid00e801c2a200$bb9d40a0$84efaa40@mrossiter">
  <pre wrap="">

----- Original Message -----
From: "Matt Rossiter" <a class="moz-txt-link-rfc2396E" href="mailto:rossiter@ni.net">&lt;rossiter@ni.net&gt;</a>
To: <a class="moz-txt-link-rfc2396E" href="mailto:rasterlist@synthcom.com">&lt;rasterlist@synthcom.com&gt;</a>
Sent: Thursday, December 12, 2002 12:33 AM
Subject: Re: RASTER: Fw: Help Needed: Midway Space Invaders w/ no sound

  </pre>
  <blockquote type="cite">
    <pre wrap="">Looks like someone replaced the fuse block and accidently swapped the
    </pre>
  </blockquote>
  <pre wrap=""><!---->wires.
  </pre>
  <blockquote type="cite">
    <pre wrap="">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
    </pre>
  </blockquote>
  <pre wrap=""><!---->about.
  </pre>
  <blockquote type="cite">
    <pre wrap="">Thanks guys for the help!

Matt

----- Original Message -----
From: "Mark Shostak (DOS)" <a class="moz-txt-link-rfc2396E" href="mailto:shostak@augustmail.com">&lt;shostak@augustmail.com&gt;</a>
To: <a class="moz-txt-link-rfc2396E" href="mailto:rasterlist@synthcom.com">&lt;rasterlist@synthcom.com&gt;</a>
Sent: Wednesday, December 11, 2002 11:50 PM
Subject: Re: RASTER: Fw: Help Needed: Midway Space Invaders w/ no sound

    </pre>
    <blockquote type="cite">
      <blockquote type="cite">
        <pre wrap="">Ok, I pulled out the chip and measured the voltages. The one I'm
        </pre>
      </blockquote>
    </blockquote>
    <pre wrap="">concerned
    </pre>
    <blockquote type="cite">
      <blockquote type="cite">
        <pre wrap="">with the most is the audio voltage which was reading around 40 volts
        </pre>
      </blockquote>
    </blockquote>
    <pre wrap="">now!
    </pre>
    <blockquote type="cite">
      <pre wrap="">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).

      </pre>
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<br>
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Received on Thu Dec 12 12:17:15 2002

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