Yamaha CS80

Two questions (one for the techs), and one previously as a reply to
Scott's post about home organs...

I have two faults, same note/channel.
One plays but cannot be tuned up - very LOW note, the other is silent.

I noticed that the IG00156 chips are running very hot (and possible
discoloured writing on them - purple-ish..?)

If I posted my 'scope findings here would any one have a go at
analyzing for me please? There are discrepencies between these two
boards.. as one sounds and one doesn't.


And the earlier post.... Thanks, Tom....

This is interesting Scott,

Would it be possible to have a list of exactly which Electone organs
are *the ones* as a source for spare CS80 chips..?

Do any use the IG00156 chip..?


--- In yamahacs80@yahoogroups.com, Scott Rider <oldcrow@...> wrote:

>
> --so find old Yamaha home organs put to pasture and liberate
> soem
> IG chips. ;)

On Sep 23 2007, Quazimodo wrote:

>Would it be possible to have a list of exactly which Electone organs
>are *the ones* as a source for spare CS80 chips..?
>
>Do any use the IG00156 chip..?

Yamaha E-30, E-50, E-70, EX-1 and EX-2 look like the best bets to me. It's 
possible the technology found its way into other products too.

Richard