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Vintage Synth Repair

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Thread

New here - and need help with something

New here - and need help with something

2006-11-02 by sothatswhereiwent

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.

RE: [vintagesynthrepair] New here - and need help with something

2006-11-03 by Scott Nordlund

>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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Re: New here - and need help with something

2006-11-03 by sothatswhereiwent

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.
> 
> _________________________________________________________________
> Stay in touch with old friends and meet new ones with Windows Live
Spaces 
>
http://clk.atdmt.com/MSN/go/msnnkwsp0070000001msn/direct/01/?href=http://spaces.live.com/spacesapi.aspx?wx_action=create&wx_url=/friends.aspx&mkt=en-us
>

Re: New here - and need help with something

2006-11-07 by sothatswhereiwent

no schematics? diagrams? for cs01II by the way and yes there is a
schematics diagram for the first model but looking at it it seems that
the latter model seems to use a bunch of different parts. If I had the
schematics for the II that would be very helpful. Can anyone help me
out with that?

--- In vintagesynthrepair@yahoogroups.com, "sothatswhereiwent"
<sothatswhereiwent@...> wrote:
>
> 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.
> > 
> > _________________________________________________________________
> > Stay in touch with old friends and meet new ones with Windows Live
> Spaces 
> >
>
http://clk.atdmt.com/MSN/go/msnnkwsp0070000001msn/direct/01/?href=http://spaces.live.com/spacesapi.aspx?wx_action=create&wx_url=/friends.aspx&mkt=en-us
> >
>

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