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.comSubject: [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