Archive of the former Yahoo!Groups mailing list: Yamaha CS80

hi folks, so after alot of work, and some swapping around, i've got 1 of the 2 DOA cs-40's up and running. i've just got a few more issues on this, hoping you could steer me in the right direction:

-there are 2 controls that arent working at all, a VCO level pot, and waveform selection pot. after some tests, im quite positive that the actual pots are working properly. so where else should i be looking?

in the case of the waveform selection pot, VCO 2 is permanently on PW, even if the selector is switched to ramp or triangle. would you investigate the VCO chip(i hope not, i got this thing mainly for spares for my 80), or a logic chip somewhere, or something im not familiar with?

this is the most pressing issue. there's a smaller issue of both voices not having the same release time, but im sure i can find that somewhere in the service manual. thanks guys!

(ps-i have the rest of the service manual in pdf format for the cs-40m, if anyone wants that, give me a shout and i can send a link to it).





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