If switch to fifth and full pitchbend up the last two notes (B5, C6)
have the same pitch,
switch to third the notes are ok as they should be.
Pitchbend swith Octave/Fifth/Third have different resistors connected
so it lower the pitchbend voltages to CV input on the voicecards.
I have had this sytnh for 2years now and i have replaced almost every
logical ic's and electrolytic capacitors in it so it should be in
great shape i thought, but still this problem won't disappear.
>
> How does it behave if you switch the bend range to fifth/third ?
> ----- Original Message -----
> From: Anders Eriksson
> To: yamahacs80@yahoogroups.com
> Sent: Wednesday, February 18, 2009 11:10 AM
> Subject: [yamahacs80] Re: Yamaha CS70M Pitch bend problem
>
>
> 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?
Show quoted textHide quoted text
> >
> > 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
> >
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
