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Pressing the two "wah" buttons kills CS-80?

Pressing the two "wah" buttons kills CS-80?

2005-07-19 by h0merxxx

I heard the rumor that if you press the two "wah" buttons (the two 
square grey once) simultaneous you blow the whole CS-80.
Could anyone of you confirm this rumor because I found no clue 
regarding this in the manual.

Re: [yamahacs80] Pressing the two "wah" buttons kills CS-80?

2005-07-19 by David Rogoff

h0merxxx wrote:

>I heard the rumor that if you press the two "wah" buttons (the two 
>square grey once) simultaneous you blow the whole CS-80.
>Could anyone of you confirm this rumor because I found no clue 
>regarding this in the manual.
> 
>
>  
>
Well, I'm sure I've done this before, but I'll try it again when I get 
home.  I just looked at the schematics 
(http://www.synthfool.com/schematics/cs80_1.jpg): the switches (SW-9, 
along the top of the schematic, about 3/4 toward the right) turn on FETs 
that act as audio switches, turn on/off the output of the wah circuit or 
the pre-wah signal.  The FETs' outputs are tied together, so if they're 
both on there will be a short. I'm a little rusty on my transistor 
theory, but I doubt this would hurt them.  It certainly wouldn't hurt 
anything in the CS-80 beyond those two FETs.

 David

Re: [yamahacs80] Pressing the two "wah" buttons kills CS-80?

2005-07-19 by Tommy Priakos

I've done this before too, but my CS plays as per normal, as David was saying. Now, as for Wah functionality, that may be a different story, and perhaps the range of my wah/expression isn't like it used to be... A result of this "short", perhaps??? Or it could be the photocell in the Expression pedal too.
Tommy

David Rogoff wrote:
Show quoted textHide quoted text
h0merxxx wrote:

>I heard the rumor that if you press the two "wah" buttons (the two
>square grey once) simultaneous you blow the whole CS-80.
>Could anyone of you confirm this rumor because I found no clue
>regarding this in the manual.
>
>
>
>
Well, I'm sure I've done this before, but I'll try it again when I get
home. I just looked at the schematics
(http://www.synthfool.com/schematics/cs80_1.jpg): the switches (SW-9,
along the top of the schematic, about 3/4 toward the right) turn on FETs
that act as audio switches, turn on/off the output of the wah circuit or
the pre-wah signal. The FETs' outputs are tied together, so if they're
both on there will be a short. I'm a little rusty on my transistor
theory, but I doubt this would hurt them. It certainly wouldn't hurt
anything in the CS-80 beyond those two FETs.

David

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