I recently broke a diode while having the BA-board turned upside down
for desoldering the opamps. At that moment, the highest 4 keys all had
the same pitch. I was lucky I could find the bad component because the
broken diode could be seen by eye. In your case I would desolder all
diodes and check them. Good luck.
--- In yamahacs80@yahoogroups.com, "Heath Finnie" <heathfinnie@...>
wrote:
for desoldering the opamps. At that moment, the highest 4 keys all had
the same pitch. I was lucky I could find the bad component because the
broken diode could be seen by eye. In your case I would desolder all
diodes and check them. Good luck.
--- In yamahacs80@yahoogroups.com, "Heath Finnie" <heathfinnie@...>
wrote:
>and IC3 being both in
> Thanks Kyle, I do find it weird though that any combination of TR29
> the pitch problem is there and when one of either of them are removedthe pitch problem
> goes away. It seems that if there was another issue like youmentioned, wouldn't it
> probably not be this specific?board. all the diodes,
>
> I've pretty much replaced everything on the lower half of the BA
> most all the resistors, IC1, IC2, IC3 and IC4, TR29 and both fets.Somewhere around IC3
> and TR29 the pitch goes haywire.
>