Vintage Synth Repair

Probably the top CA3046 has failed on the VCO board. You can swap the 2 of them to see 
if the fault changes, but BE CAREFUL: they are plugged in in opposite directions.

Your machine will sound much better if you replace all of the electrolytic capacitors. There 
is only 1 on the VCO board BTW.


--- In vintagesynthrepair@yahoogroups.com, "martinreuter" <FrauReuter@...> wrote:
>
> Hi everybody,
> my minimoog #3271 with R.A.Moog boards strikes. In this afternoon it worked very 
well, but 
> now, four hours later I switched it on and can not hear oscillator 1 and the other both 
oscs 
> have a very bad scaling - they are completely out of tune. What can this be? The Synth 
was 
> stored away for a lot of years, i woke it up last week, cleaned all switchs + key-contacts 
and 
> after that it worked  PERFECTLY! 
> Now I swapped the Oscillator board with a newer one (also an older version with seven 
pots) 
> - that works. But I love the R.A.Moog board and will repair it. Does anybody know, 
which 
> caps should be changed after this long time? 
> Thanks for your answers
> +best regards from 
> a very unhappy Martin
>