sh-3a schematic/advice

[Peri Pakroo]

Hi—I'm looking for a schematic for a roland sh-3a. I've looked online and
in a bunch of list archives, but no luck yet. Any leads would be greatly
appreciated. 

Also, I'm really really green on all the tech aspects of analog synths and
electronics in general, so any advice on how to diagnose/repair my sh-3a
would be really cool. I'm reading books, etc. and teaching myself about
electronics, so I'm not looking for someone to teach me a-z, just pointers
would be great. Bottom line is I want to get this synth working; i just
got it (for a great price) but it doesn't make any sound. Power light
turns on, but that's it. I've checked for obvious stuff like blown fuses
(i replaced 'em) and disconnected wires (i reconnected 2 wires that had
been cut), but still no sound. Thanks in advance for any advice.

Peri