Vintage Synth Repair

On Saturday 04 February 2006 06:38 pm, maschinengeist001 wrote:
> I found this. Hope that helps. It seems to me rather complete
> schematics.
>
> http://people.umass.edu/brownp/arp/techinfo.html

Nice pages!

I'm loading the schematic for the lower voicing board as I type.  The point of 
interest here is the bit at the lower left corner where it says "short 
release 0V long release -15V" which is tied to the negative side of all those 
22uF capacitors,  all of which are also seeing a zero-to-+15V keying voltage, 
thereby putting 30V across some 25V caps...

-- 
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space,  a critter that can
be killed but can't be tamed.  --Robert A. Heinlein, "The Puppet Masters"
-
Information is more dangerous than cannon to a society ruled by lies. --James 
M Dakin