Vintage Synth Repair

Ok - next question: where can I get the schematics? Can I get them
anywhere online? And while I'm at it is there a way to beef up the
LFO? Can I somehow make the breath control knobs give it extra LFO
depth and width? Someone told me somewhere that I just need to
exchange some resistors or add some extra pots. Dunno. would be cool
if I could do that.  
--- In vintagesynthrepair@yahoogroups.com, "Scott Nordlund"
<gsn10@...> wrote:
>
> >Hello, everyone! I have found an old yamaha CS01 synth in a pawn shop
> >and it worked fine so far until I borrowed to a friend and he had the
> >really stupid idea to hook a walkman into the breath control, hoping
> >to get some weird filter effects out of it and of course screwed it
> >all up! Long story short - it now has a flaw/feature Every time (and
> >only then) when I flip that switch below the mod/pich wheels to vcf
> >modulation and the mod wheel is set to 0, the filter(?) sounds gritty
> >and distorted which sounds kinda cool but I want to fix it now because
> >it's DEFECT and not a mod of mine! So where should I look? What should
> >I look for? I have a multimeter and nuff experience to replace some
> >caps and resistors and such. Just need someone to show me where to
> >start and what to look for.
> 
> The breath controller input probably expects a resistance to be
applied, not 
> a voltage- I'd imagine it blew the first transistor, op amp, or
whatever 
> after the breath controller input.  You'll likely need schematics to
figure 
> it out.
> 
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