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Yamaha CS80

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sorry for the questions, guys...what provides pwm/saw shapes?

2008-04-27 by rj krohn

hi folks, my apologies for the incessant questions, im hoping to be in the final throes of questionland....

one of my voices just lost it's ability to make pwm and saw shapes(sine still works). i took voltage readings on the VCO chip, and the only differences from "normal" are pins 7&8. both are reading +.6, whereas a normal voice reads 1.2 or so. otherwise, all the voltages look normal.

does anyone know what provides these? is it within the IG 00153 chip, or elsewhere? as always, i cant thank you guys enough, i truly appreciate all your help- rj


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