Vintage Synth Repair

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.


-- 
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ablest -- form of life in this section of space,  a critter that can
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-
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