[sdiy] Multivox MX-75 synth help

[Adam Inglis]

I haven't seen one of these before, but I've been repairing a Roland  
SH2000 and this looks like it has very similar architecture in the  
touch sensitivity, the envelope switches, and the matrix presets  
(except the Roland is single oscillator). What year was this made?  
Multivox were known to "borrow" from Roland's designs in the  
seventies (such as the 202 strings)

You may get some help by looking at the SH2000 service notes - there  
is an excellent copy on the net somewhere...



regards
Adam Inglis
http://www.adambaby.com

On 18/05/2011, at 6:01 AM, Robert Weigel wrote:

> A guy in nyc is having me fix one on my trip. I spent quite a bit  
> of time
> figuring out where everything is, fixing a couple sliders... power  
> supply,
> modulation and vca seem ok. I hear noise enveloping...but I could  
> really
> use a diagram because only banjo worked when I started..then it  
> died for
> no apparent reason. Both vco's were working..now no CV to them  
> though the
> gate and cv into the board are ok. No cv 1 or 2 out.  If someone has a
> diagram Parker would pay you well to get us a copy
> ...parker.reilly at gmail.com (I think I spelled
>
> or... better yet...
>
> 917-434-9376 ..and if the same happen to have any SAJ110 chips we  
> could
> use one of those too..and a 3 lights for a crumar traveller 1 so  
> far :-).
> Trying to fix a slough of things for him asap here before I move on.
> Thanks a bunch.  That banjo I was guessing bypassed the filter but  
> maybe
> there's some other issue now...-Bob
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>
>
>