Yamaha CS80

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.

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

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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