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
>