[sdiy] Yamaha IG00153 wanted for CS15--I assume i must have dead VCO:)

Mattias Rickardsson mr at analogue.org
Tue Jan 17 23:23:00 CET 2017


have you checked the waveform selector and the volume potentiometer
for the VCO? If any one of them is broken or glitchy, the VCO can seem

My recommendation would be: First check the above and/or probe the VCO
with an oscilloscope to ensure that it's really dead, then look for
the rare replacement chip. :-)


On 17 January 2017 at 23:05, David Bulog <d2ba at xtra.co.nz> wrote:
> Hi all
> Looking for 1 x  stock Yamaha part  IG00153
> (Description VCO) to repair my CS-15 —VCO2 is not working when i received
> synth from Japan
> as VCF2 and EG2 is ok —i can test by sending VCO1 there
> I assume i must have dead VCO so wish to get this part before taking to my
> tech
> thanks un advance
> Dave
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