[sdiy] Yamaha CS-60 issues

[Florian Anwander]

Hello Al
Welcome to the group!

If the voltages at the potentiometers are ok, then the only two 
possibilities I see is are either the 4558 (IC14 - causing some number 
overrun inside the D/A if to much voltage is sent) or (more ugly) the 
YM26700 itself (IC11).

The 4558 is easy to replace, the YM26700 is quite an unobtainium


Florian

Am 30.09.20 um 18:38 schrieb al spitzley via Synth-diy:
> HI all,
> This is my first email to the group, hopefully I'm doing it right!
> I am working on a CS-60 that has a strange issue with the Brillance 
> controllers on the right. They LO lever seems to work correctly. 
> However the HI lever changes the pitch of the notes when you pull the 
> lever down. It shifts the pitch up as well as adding unwanted 
> artifacts to the sound. I'm scratching my head as to why this might be 
> happening. I'm assuming something is going wrong in the KBC circuit.
> Does anybody have any ideas?
> Thanks
> Best
> Al
>

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