Yamaha CS80

thanks a ton, guys. i'll report back with results.



David Rogoff <david@...> wrote:                               --- In yamahacs80@yahoogroups.com, rj krohn <r_j_d_2.phila@...> wrote:
 > TP1 -.66V;0V at trigger -.66V; .87V at trigger
 
 Well, that's the cutoff voltage to the filters, so there is the problem. 
 
 --- In yamahacs80@yahoogroups.com, "kent_spong" <kent_spong@...> wrote:
 > Just a guess here but try swapping out the VCF EG's VCA (151)
 
 Yeah - I think that's the most likely. You can swap the suspect 151
 (IC1) with IC3, which controls the sine-wave level. Luckily, assuming
 it fixes it, the CS80 has about a billion of these chips, along with
 the other CS and SK synths and many Electone organs from the era, so
 it shouldn't be too hard to find a replacement.
 
 Make sure you put it in the right way!
 
 David
 
 
     
                               

       
---------------------------------
Never miss a thing.   Make Yahoo your homepage.

[Non-text portions of this message have been removed]