Ho, yes for the records! Sorry !
Well the problem cannot be applied to a normal cs-80 . but here was the problem .
A jumper was removed between ground and ic14 to ic20 ground rail , so all K output were floting . Probably removed by the devil or simply to make the microsine system work ,,, Good thing i have keen eyes because I am new to this polyphonic system and i could have been searching the problem till the end of time,,. since... all parts were testing ok .
Now the pitch is changing but i got many other problems , i think i got some wiring wrong on the preset matrix , it work but in a very wierd way . also the keyboard controls is giving me problems . Is the center tap position really to ground ? and a complete calibration needs to be done. One output is dead . etc etc ,,,,, It sure make strange music ,,, all vco are giving different octave , out of this world music ,, ahahah
As i am here , i need some more parts .. All the knobs ( rotary )tune speed depth volume etc. The mix fader it is a dual gang , balance ( was replaced by a normal fader , microsine again ) 4 ig00157 ( they are on the tone selector assembly pcb ) or if someone know with what i could replace them , it is probably a simple transistor array . sting 3 string 4 panel 1 panel 2 harpsicord 2 , pushknobs . after that it will be complete .... And one more CS-80 on the road .. . . next time ! i will start the hunt for wrong wirering ....
. --- In
yamahacs80@yahoogroups.com, "Heath Finnie" <heathfinnie@...> wrote:
>
> --- In yamahacs80@yahoogroups.com, "zenithaudio2003" <zenithaudio2003@> wrote:
> >
> > problem resolved !!!!!!!
> > --- In yamahacs80@yahoogroups.com, "zenithaudio2003" <zenithaudio2003@> wrote:
> > >
> > > hi , i have finished the rewirering ! .
> > >
> > > everything is working , aftertouch etc etc , the only problem is that i have no pitch changes . It always play the same note ,,,,, i have checked the logic of ym26600 , show good c+ gives 1111 and so on ,,, so as i have rewired tons of cables it could be a simple mistake .
> > > So ,,, other then ym26700 what can create the ( no pitch changes ) problem .
> > >
> >
>
> What ended up being the problem?
>