You can try swapping the CEM3374 VCO chip from that voice with another one and see if the failure follows it. If you need a new chip I have them.
Doug
synthparts.com

--- In oberheim@yahoogroups.com , "Ben" <ben_rau23@...> wrote:
>
> Hi I have an issue with my Matrix-12 when tuning it PW (Pulse Wave) on Voice 6 fails is this something that can be fixed Is the PW issue a failing chip Any pointers would be great ....
>