[sdiy] Multivox MX-75 synth help

[Robert Weigel]

Yes it's right out of that mid 70's and appears to have parts used in
Teisco and a lot of similarities to ROland design. Boards say Hillwood
btw.
-Bob
> 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
>>
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>>
>>
>>
>


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