Yamaha CS80

The Yamaha IG chips were made by Mistubishi. The Mxxxx is the Mitsubishi part #. I've never seen the 153s just labeled with just the Mits part but almost all the 150s I have are. Are bad voices getting their key gates from the assigner?
Doug 
synthparts.com

--- In yamahacs80@yahoogroups.com, Fernando Zarone <fernandozarone@...> wrote:
>
> Yes, the M5162*p  ICs work as well as the corresponding IG****.
> I don't know whether this is a last rev of the machine, but it is from the factory for sure.  No sign of any  soldering...
> Now, the CS 60 (great condition) only plays the voice n.1 and the voice n. 8.  Fortunately, I do have the simple LED device for detecting the triggered voice (thank you, CSers!) . In the M boards the oscilloscope shows the presence of the right waveforms, but from the VCA IC 4 stage to the output O.  I mean, it seems to be a common problem of those voices, not related to the individual boards! 
> Any suggestion from the CS gurus?
> 
> All the best
> Fernando
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