Just an update: I changed the EG chip and that did not solve the problem. Next I swapped the VCA and the voice disappeared altogether so I swapped back the original VCA and the synth now works fine. Very strange.
I am scavenging chips from a CS50 voice board that I bought a couple of years ago through this site. Apparently the board was 100% operational so I guess I could have fried the VCA desoldering it from the board. Still doesn't get me closer to working out what the problem with the CS80 was. A good result however.
--- In yamahacs80@yahoogroups.com, "Nigel99" <nigelc@...> wrote:
>
> Hi Laurie,
>
> The key contacts are fine. The sustained note changes whenever the 5th voice is assigned.
>
> --- In yamahacs80@yahoogroups.com, "Laurie Curry" <laurie@> wrote:
> >
> >
> > I assume you checked the key contacts.... I have one that is very bouncy and on occaision needs rebending.... or it sustains
> >
> > Â
> > -----Original Message-----
> > From: Nigel99 <nigelc@>
> > To: yamahacs80@yahoogroups.com
> > Date: 05/05/13 17:18
> > Subject: [POSSIBLE SPAM] [yamahacs80] CS80 stuck/hanging note
> >
> > Â Â Â
> > Hello all,
> >
> > Longtime lurker and recent CS80 owner here. My CS arrived last week after international shipping in a custom roadcase in seemingly good order.
> >
> > On first inspection everything worked well but after moving it two rooms away to my studio it has now developed a stuck or hanging note issue. The note is heard from the time that I switch the synth on and I have isolated it to voice 5 on the top bank.
> >
> > It has been suggested to me that it may just be a trimmer that has slipped and needs minor adjustment. I have fiddled with the lower trimpots on the M board and while I can defeat the voice altogether no setting can remove the sustaining note
> >
> > I am about to swap out the EG IC and next the VCA on the M board and thought that it may be best to refer to the group to see if anyone else has had a similar issue.
> >
> > Thank you in advance and best regards,
> > Nigel
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>