<div dir="ltr">Apropos of nothing in particular, but wow -- blast from the past! The Mirage was my second ever keyboard, after my Korg Poly800 Mk II. If those schematics are online somewhere, I'd be interested to take a look, even if just for old time's sake.</div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Sep 9, 2016 at 3:39 PM, Gordonjcp <span dir="ltr"><<a href="mailto:gordonjcp@gjcp.net" target="_blank">gordonjcp@gjcp.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">On Fri, Sep 09, 2016 at 05:00:49PM +0200, Rutger Vlek wrote:<br>
> Hi guys,<br>
><br>
> does anyone have schematics for the early Mirage DSK-8? I'm struggling with a sound generation problem. Basically, I'm not getting any from the voice mux (4051), before the CEMs. I swapped out the DOC chip for a 'new' one, but no luck.<br>
><br>
> I found a schematic dated 10-17-1985, but that seems different from the DSK-8 I'm looking at. It has a -8V rather than a -12V supply line. And it has double the amount of LM318 opamps for the conversion of the DOC chips DAC output (+sig and -sig), and double the LM318s for the volume feedback circuit from and to the DOC IC.<br>
<br>
</span>I do, somewhere. I'll have a rake about tomorrow morning.<br>
<br>
DOC chips rarely fail. Have you swapped out the 4051? That's a very likely failure.<br>
<span class="HOEnZb"><font color="#888888"><br>
--<br>
Gordonjcp MM0YEQ<br>
</font></span><div class="HOEnZb"><div class="h5"><br>
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