[sdiy] Early Ensoniq Mirage DSK-8 schematics

[Sarah Thompson]

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.

On Fri, Sep 9, 2016 at 3:39 PM, Gordonjcp <gordonjcp at gjcp.net> wrote:

> On Fri, Sep 09, 2016 at 05:00:49PM +0200, Rutger Vlek wrote:
> > Hi guys,
> >
> > 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.
> >
> > 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.
>
> I do, somewhere.  I'll have a rake about tomorrow morning.
>
> DOC chips rarely fail.  Have you swapped out the 4051?  That's a very
> likely failure.
>
> --
> Gordonjcp MM0YEQ
>
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-- 
[s]
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