Yamaha CS80

It works both ways, but it is a much faster proceedure to start with
the low to rough the tuning into the ballpark and then see how far out
A5 is....if you are a notch flat, at A5, sharpen it to "half a notch"
by expanding the scale(counter clockwise)....when you return to the
low A it will also be half a notch flat......turn "little blue"
counter clockwise to "440" and you should be close to finished with
that one.......when I do it the other way, it takes me twice as
long.....same results....

-----Original message-----
From: rj krohn r_j_d_2.phila@...
Date: Fri, 19 Sep 2008 20:18:52 -0600
To: yamahacs80@yahoogroups.com
Subject: RE: [yamahacs80] Tuning

ok, just consulted the manual. we're both a little off, but you are
closer to right"

top blue pot(VR3) is 2' pitch, 1st big pot (VR2) is offset, HOWEVER,
it also says to tune 2' pitch at A4, and offset at A1. i have been
doing this backwards,and have somehow come up with tuning that is spot
on, or within a few cents across the keyboard. wierd....



--- On Fri, 9/19/08, Laurie Curry wrote:
From: Laurie Curry 
Subject: RE: [yamahacs80] Tuning
To: yamahacs80@yahoogroups.com
Date: Friday, September 19, 2008, 7:41 PM













Okay....



This is completely backward with my tuning proceedure.. ..



1 make sure detuneII is centred and the dual pitch tuning is

centred....



mix 1 for 1-8, mix 2 for 9-16...



open her up....



As I know it.....the little blue ten turn pot....is the "pitch" of the

2 foot osc...



adjust holding A1 with a plastic screwdriver. ...clockwise flattens,

counter clockwisesharpens.... .



.....the next larger trimpot is the Octave scaling Calibration

(guitarist would call this intonation) between lower and upper (set

using 2 foot on A5)...Turn clockwise to compress the range-(A1

sharpens as A5 flattens) or counter clockwise to expand the range (A1

flattens as A5 Sharpens)... then re adjust little blue on

A1...repeating until all 2 foot oscillators are bang on at both A1

and A5....



from this point it gets much easier  as the trimpots aren't so touchy

.....the next trimpot is the 4 foot tune offset...... counter
clockwise

sharpens.... setfor all then



.....the next trimpot is the 8 foot tune offset....counter clockwise

sharpens.... set for all then



almost done champ



.....the next trimpot is the 16 foot tune offset...... .counter

clockwise sharpens.... .you will find the trimpots are much easier in

this range....



Close her all up and play with the mix in the middle....listening for

beating..... .repeat procedure if neccessary.. .



-----Original message-----



From: Scott Metzger scottmetzger3d@ hotmail.com

Date: Fri, 19 Sep 2008 10:58:38 -0600

To: yamahacs80@yahoogro ups.com

Subject: RE: [yamahacs80] Tuning



Thanks RJ.So when I first tune step 2, do I tune it across the board

for all voices first, or do I just start on one voice and tune from 2

to 16?-ScottTo: yamahacs80@yahoogro ups.comFrom:

r_j_d_2.phila@ yahoo.comDate: Fri, 19 Sep 2008 04:12:03 -0700Subject:

Re: [yamahacs80] Tuning



figure i'd save david a little breath....



-voice 8-correct. 1 note sustained +7 notestriggered=voice 8



-trim pots, from top:

-little blue one-scale

-2

-4

-8

-16

YOU MUST DO THIS FROM THE TOP DOWN!!! 2' offsets all other octaves. (

have forgotten this several times!)



STABILITY: maybe want to redo the thermal grease on the VCO chips?

other than that, i would guess you might not be getting consistent

voltage supplied to the cards, unless it is the same voice always

falling out of tune. good luck.



--- On Fri, 9/19/08, Scott Metzger wrote:

From: Scott Metzger 

Subject: [yamahacs80] Tuning

To: yamahacs80@yahoogro ups.com

Date: Friday, September 19, 2008, 2:45 AM



Hey David.



So my CS80 is out of tune again. It isn't dramaticly off, but it is

off a good +12, or +25 centson some voices.



Do you know why this is happening? How do we get stable tunning so I

don't have to open this thing up every week? Also, where on the card

do I jiggle to see which Voice I am on?



Thanks



-Scott



Also, to find Voice 8, I need to hold a note down, then press A untill

I find Voice 8 correct?



Also, what is the first POT on the voice cards? I think I might have

turned those first pots by mistake. 



:(



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