Vintage Synth Repair

Thanks a million.

Happily. I have a spare one available for comparing measures - and I 
presume it just might have been a regulator giving up. But still - 
the specs on these will come in handy. 

Thanks for your effort with the parts site. It's excellent.


-Mu


--- In vintagesynthrepair@yahoogroups.com, "Roy J. Tellason" 
<rtellason@...> wrote:
>
> On Monday 17 September 2007 17:19, Mu wrote:
> > I just started work on a Roland SH1000, and I'm looking for 
service
> > documents or schematics - unsuccesfully so far.
> >
> > What I would need in specifics is a
> > - Connection diagram for the top panel
> > - The full name/characteristics on the transistors marked "C373"
> > and "A733/Q265"
> 
> The full part number for those would be "2SC373" and "2SA733",  
which is 
> typical for Japanese transistor numbering,  they leave the "2S" 
off.  You can 
> find datasheets through here:
> 
> http://www.classiccmp.org/rtellason/parts-index.html
> 
> and yeah,  that's my doing.  :-)
> 
> > - An educated guess on where to start when it did produce sounds
> > recently, but now sports a dead (replaced to no avail) fuse and
> > absolute silence
> 
> Fuse is blown and you replaced it but no change?  I'd start with 
checking the 
> power supplies,  filter cap voltage ratings should give you some 
rough idea 
> of what you want to see there.
> 
> 
> -- 
> 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
>