The way I decided it was probably the VCO chip was that there was no
waveform on the output (pin7) Changing the chip confirmed this.
Check pin 7 for the waveform if you have a scope.
Cheers,
TOM
--- In yamahacs80@yahoogroups.com, rj krohn <r_j_d_2.phila@...> wrote:
>
> do you mind if i ask where you got a replacement chip? i now believe
that i just need a vco chip instead of the entire voice card-the voice
seems to actually trigger, as i tried running the noise up on it, and
the noise is audible. i also get a slight gain change from the vca
level, so im assuming that the vco chip is the culprit. just no tone
generation, other than noise. the vca is one of the yamaha IG chips,
right?
>
> if anyone out there has one for sale, i'd love to buy one. thanks.
>
> Quazimodo <noddyspuncture@...> wrote:
Fixed one faulty voice - it turned out to be the VCO chip.