Vintage Synth Repair

Thanks Terje!!!

Must check that one and the swapping idea is a clever one :)  I´ll let you know how it turned out...

cheers,
Ami

--- In vintagesynthrepair@yahoogroups.com, Terje Winther <terje.winther@...> wrote:
>
> Check the CA3080 chips.
> But beware: sometimes putting in a modern CA3080 will not help: you  
> need a 3080 tested to be within a specific range.
> Since you mention that noise works: I have had success swapping the  
> 3080 from the noise to the VCO, and putting in a new 3080 into the  
> noise section.
> 
> > Now my trusty old Micromoog from 1976 has failed and I am at loss to  
> > localise the problem. Noise, filter, and modulation work just fine,  
> > but the actual sound-producing oscillator is dead. I have heard that  
> > some people have fixed their micromoogs by replacing some op amps,  
> > but I really would like to know where to start looking. I have the  
> > service manual and have replaced a couple of bits listed as possible  
> > reasons in the troubleshooting guide. This resulted in the filter,  
> > VCA, and modulation coming back to life, but no oscillator sound.
> >
> > It seems to get more complicated next, so I would very much like to  
> > hear if someone of the listees has fixed the oscilltor and what was  
> > the problem in your case...
> >
> > cheers and thanks in advance,
> >
> > Ami
> > 
> >
> 
> Terje Winther
> terje.winther@...
> http://www.wintherstormer.no/
>