Yamaha CS80

Thanks Kent, I really appreciate your offer of help sir!

OK this is gonna be kind of difficult to explain...

I'll call the lowest C- C1 and the highest C- C6.

Here goes...

C1, Eb1, F#1, A1, C2 ... all at full AT.
The notes in between these have no AT.

C#2 > F#2 .. all OK

G2 > C4 are behaving now an then "intermittently".

C#4 > F#4 .. all OK

G4 > C6 .. all have no AT

There is a weird anomally though....

When I press any of the intermittent keys when they are working, and
then I press one of the full AT keys at the same time it makes the
ones that are working (the intermittent one), STOP working.

And the other way, if I hold down a full AT key and press one of the
intermittent ones at the same time, the full AT disappears, cuts off
to nothing. This must be a clue...?

I checked all my soldering - was the first thing I looked at with a
magnifying glass and there are no visible joins. My soldering is quite
good as I went to college years ago and passed some electronics courses.

BTW Kent, when you mentioned the AF board you mean the small one to
the left of the keyboard assembly I asume? I think I avoided it (I'll
double check) - but anyway this problem seems strange in that
everything was working just fine for a day or two after I did all the
work. This all happened this morning.

Thanks again Kent,
And thanks to all of you who replied as well.

Tom




--- In yamahacs80@yahoogroups.com, "kent_spong" <kent_spong@...> wrote:
>
> Ah welcome to my world!
> 
> I got some idea what you might have done here. Tell me what keys 
> have no AF and what one's do. I can then tell you what ic's have 
> gone if any.
> 
> Did you hit the AF connecter board on the top of the psu?
> 
> If your geting some notes with full AF you may have joined some legs 
> together when putting the 0.1 caps on.
> 
> Let us know all the faults and I will help you out as I am working 
> right though the Christmas holiday anyway. ( on 80's as always )
> 
> KSR
>