Yamaha CS80

Yes it's completely different on the CS-80 with a 
ribbon, but you say that pitchbending up from zero on the CS-80, 
thats one octave up, i wonder if the cv voltage doubles on the CS-80 
to?
 
It must be something that limits the pitchbend on my CS70M (last 6 
keys) when CV voltage passes 5.7 volts the pitch freeze, it seems 
that the highest key voltage for my VCO's i 5.7 volts. 
Keyboard voltage on the CS70M is: 
Lowest C: 125mv
Highest C: 4V



>
> the pitch bend is a ribbon on the CS80....totaly different then the 
wheel on the 70m....
> I used to have one and still have my magneto's....
> On the Cs80...there is no center detent.....where ever you touch 
the ribbon becoms zero......
> you can pitch down from 0 to subhz(less than one hz), but only bend 
up from 0 an octave....and that is using the same lenght of ribbon...
> -----Original message-----
> From: "Anders Eriksson" aliaswavefront@...
> Date: Tue, 17 Feb 2009 16:05:20 -0700
> To: yamahacs80@yahoogroups.com
> Subject: [yamahacs80] Yamaha CS70M Pitch bend problem
> 
> Hello everyone!
> 
> I have a problem with the Yamaha CS70M, it's the pitch bend on the 
> last 6 highest notes G - C6, they wount go up a hole octave instead 
> stops at G6 on all last 6 keys.
> 
> All ref.voltages from the service manual are correct (from 
keyboard, 
> to the 12 voice cards), and when pitch bending a hole octave the 
key 
> voltage doubles, for the highest key you have 4volt CV in on leg2 
> (key voltage input) IG00153 and when pitch bend full upp: 8volt, 
but 
> when the CV reaches 5.7volt the pitchbend stops. 
> 
> This is for all voice cards there is 12 of them, and i cant belive 
> that all VCO IC's are faulty. Can it be a design fault from Yamaha?
> 
> How is it with the CS-80? when pitchbend fully up, have anyone 
> measured the CV voltage on the IG00153 IC?
> 
> Would be greatful for all help!
> 
> /Anders
>