Yamaha CS80

Hi everyone,

I currently have one of my CS80's opened up and am working on a couple
of faulty voices. Something occured to me, as I am looking at the 'M'
boards closely. It is well documented that moving the CS80 can throw
it out of tune because the type of preset controls used to tune the
synth are prone to vibration effects. It occured to me that virtually
ALL the presets on the 'M' board are of similar or even the same type
and therefore prone to the same problem. That would mean that not only
the tuning would suffer from continued movement but all the VCA and
VCF calibrations as well..!

I wonder which would be the safest plane to move the CS80 on?

I am asuming that leaving it standing on it's castors (as opposed to
lying it flat ie: the same plane as when it is on it's stand) would be
the best.

Anyone with any ideas on the subject?

Cheers all,
TOM

It will remain more in tune if it lies flat....as you would play
it.....

It is a mistake to use the castors on the back side of the synth....

Rolling it on it's upright edge is the biggest culprit resulting in
tuning problems..
-----Original message-----
From: "Quazimodo" noddyspuncture@...
Date: Wed, 14 Nov 2007 10:49:49 -0700
To: yamahacs80@yahoogroups.com
Subject: [yamahacs80] CS80 moving, tuning and stuff.....

Hi everyone,

I currently have one of my CS80's opened up and am working on a couple
of faulty voices. Something occured to me, as I am looking at the 'M'
boards closely. It is well documented that moving the CS80 can throw
it out of tune because the type of preset controls used to tune the
synth are prone to vibration effects. It occured to me that virtually
ALL the presets on the 'M' board are of similar or even the same type
and therefore prone to the sameproblem. That would mean that not only
the tuning would suffer from continued movement but all the VCA and
VCF calibrations as well..!

I wonder which would be the safest plane to move the CS80 on?

I am asuming that leaving it standing on it's castors (as opposed to
lying it flat ie: the same plane as when it is on it's stand) would be
the best.

Anyone with any ideas on the subject?

Cheers all,
TOM





[Non-text portions of this message have been removed]

please let me know how you come with the faulty voices.....i have one M-board that is not working, and im not sure where to start looking.....thanks.

Laurie Curry <laurie@...> wrote:
It will remain more in tune if it lies flat....as you would play
it.....

It is a mistake to use the castors on the back side of the synth....

Rolling it on it's upright edge is the biggest culprit resulting in
tuning problems..
-----Original message-----
From: "Quazimodo" noddyspuncture@...
Date: Wed, 14 Nov 2007 10:49:49 -0700
To: yamahacs80@yahoogroups.com
Subject: [yamahacs80] CS80 moving, tuning and stuff.....

Hi everyone,

I currently have one of my CS80's opened up and am working on a couple
of faulty voices. Something occured to me, as I am looking at the 'M'
boards closely. It is well documented that moving the CS80 can throw
it out of tune because the type of preset controls used to tune the
synth are prone to vibration effects. It occured to me that virtually
ALL the presets on the 'M' board are of similar or even the same type
and therefore prone to the sameproblem. That would mean that not only
the tuning would suffer from continued movement but all the VCA and
VCF calibrations as well..!

I wonder which would be the safest plane to move the CS80 on?

I am asuming that leaving it standing on it's castors (as opposed to
lying it flat ie: the same plane as when it is on it's stand) would be
the best.

Anyone with any ideas on the subject?

Cheers all,
TOM

[Non-text portions of this message have been removed]






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[Non-text portions of this message have been removed]

Fixed one faulty voice - it turned out to be the VCO chip.

--- In yamahacs80@yahoogroups.com, rj krohn <r_j_d_2.phila@...> wrote:
>
> please let me know how you come with the faulty voices.....i have
one M-board that is not working, and im not sure where to start
looking.....thanks.
>

do you mind if i ask where you got a replacement chip? i now believe that i just need a vco chip instead of the entire voice card-the voice seems to actually trigger, as i tried running the noise up on it, and the noise is audible. i also get a slight gain change from the vca level, so im assuming that the vco chip is the culprit. just no tone generation, other than noise. the vca is one of the yamaha IG chips, right?

if anyone out there has one for sale, i'd love to buy one. thanks.

Quazimodo <noddyspuncture@...> wrote: Fixed one faulty voice - it turned out to be the VCO chip.

--- In yamahacs80@yahoogroups.com, rj krohn <r_j_d_2.phila@...> wrote:
>
> please let me know how you come with the faulty voices.....i have
one M-board that is not working, and im not sure where to start
looking.....thanks.
>






---------------------------------
Never miss a thing. Make Yahoo your homepage.

[Non-text portions of this message have been removed]

I don't believe the plane of transportation has any effect. It
doesn't matter in what plane the vibration comes in. It's just
vibration itself in combination with the spring-force that's left
inside the trimmers (the older, the less strong the trimmer-shaft
makes contact).
If the casters were on another side, it would result in the same
risks. Just carry the CS80 with two persons if the floor is uneven.

I feel the older the synth gets, the more problems these trimmers
cause (too less spring-force, dead spots). Most of the problems I
had were caused by these trimmers (vca- adjustments for instance)
Are these trimmers, or good new 1:1 replacements, still available,
does anybody know ?


--- In yamahacs80@yahoogroups.com, "Quazimodo" <noddyspuncture@...>
wrote:

>
> Hi everyone,
>
> I currently have one of my CS80's opened up and am working on a

couple

> of faulty voices. Something occured to me, as I am looking at

the 'M'

> boards closely. It is well documented that moving the CS80 can

throw

> it out of tune because the type of preset controls used to tune the
> synth are prone to vibration effects. It occured to me that

virtually

> ALL the presets on the 'M' board are of similar or even the same

type

> and therefore prone to the same problem. That would mean that not

only

> the tuning would suffer from continued movement but all the VCA and
> VCF calibrations as well..!
>
> I wonder which would be the safest plane to move the CS80 on?
>
> I am asuming that leaving it standing on it's castors (as opposed

to

> lying it flat ie: the same plane as when it is on it's stand)

would be

> the best.
>
> Anyone with any ideas on the subject?
>
> Cheers all,
> TOM
>

Allright....

you are going out on a limb there....

I advise you to keep it flat if shipping...

A.. it wont tip over and slam down the wrong way...

B.. All previous CS80 wrtings are against the "horizontal pot" thru
transferable vibration situation in a back edge situation of
travel....
-----Original message-----
From: "erikfromhere" moogsynthex@...
Date: Thu, 15 Nov 2007 00:56:48 -0700
To: yamahacs80@yahoogroups.com
Subject: [yamahacs80] Re: CS80 moving, tuning and stuff.....

I don't believe the plane of transportation has any effect. It
doesn't matter in what plane the vibration comes in. It's just
vibration itself in combination with the spring-force that's left
inside the trimmers (the older, the less strong the trimmer-shaft
makes contact).
If the casters were on another side, it would result in the same
risks. Just carry the CS80 with two persons if thefloor is uneven.

I feel the older the synth gets, the more problems these trimmers
cause (too less spring-force, dead spots). Most of the problems I
had were caused by these trimmers (vca- adjustments for instance)
Are these trimmers, or good new 1:1 replacements, still available,
does anybody know ?


--- In yamahacs80@yahoogroups.com, "Quazimodo"
wrote:

>
> Hi everyone,
>
> I currently have one of my CS80's opened up and am working on a

couple

> of faulty voices. Something occured to me, as I am looking at

the 'M'

> boards closely. It is well documented that moving the CS80 can

throw

> it out of tune because the type of preset controls used to tune the
> synth are prone to vibration effects. It occured to me that

virtually

> ALL the presets on the 'M' board are of similar or even the same

type

> and therefore prone to the same problem. That would mean that not

only

> the tuning would suffer from continued movement but all the VCA and
> VCF calibrations as well..!
>
> I wonder which would be the safest plane to move the CS80 on?
>
> I am asuming that leaving it standing on it's castors (as opposed

to

> lying it flat ie: the same plane as when it is on it's stand)

would be

> the best.
>
> Anyone with any ideas on the subject?
>
> Cheers all,
> TOM
>

[Non-text portions of this message have been removed]

The way I decided it was probably the VCO chip was that there was no
waveform on the output (pin7) Changing the chip confirmed this.

Check pin 7 for the waveform if you have a scope.

Cheers,
TOM

--- In yamahacs80@yahoogroups.com, rj krohn <r_j_d_2.phila@...> wrote:
>
> do you mind if i ask where you got a replacement chip? i now believe
that i just need a vco chip instead of the entire voice card-the voice
seems to actually trigger, as i tried running the noise up on it, and
the noise is audible. i also get a slight gain change from the vca
level, so im assuming that the vco chip is the culprit. just no tone
generation, other than noise. the vca is one of the yamaha IG chips,
right?
>
> if anyone out there has one for sale, i'd love to buy one. thanks.
>
> Quazimodo <noddyspuncture@...> wrote:
Fixed one faulty voice - it turned out to be the VCO chip.

Surely a later monophonic series Yamaha CS could be raided for a single VCO
chip? Something like a broken CS-5, CS-10 or even CS-15.

On Nov 16 2007, rj krohn wrote:

> do you mind if i ask where you got a replacement chip? i now believe that
> i just need a vco chip instead of the entire voice card-the voice seems
> to actually trigger, as i tried running the noise up on it, and the noise
> is audible. i also get a slight gain change from the vca level, so im
> assuming that the vco chip is the culprit. just no tone generation, other
> than noise. the vca is one of the yamaha IG chips, right?
>
>if anyone out there has one for sale, i'd love to buy one. thanks.
>
> Quazimodo <noddyspuncture@...> wrote: Fixed one faulty voice - it
> turned out to be the VCO chip.
>
> --- In yamahacs80@yahoogroups.com, rj krohn <r_j_d_2.phila@...> wrote:
> >
> > please let me know how you come with the faulty voices.....i have
> one M-board that is not working, and im not sure where to start
> looking.....thanks.
> >
>
>
>
>
>
>
>---------------------------------
>Never miss a thing. Make Yahoo your homepage.
>
>[Non-text portions of this message have been removed]
>
>

I seem to remember I didn't even get 'noise' whith the faulty chip..!

Cheers,
TOM

--- In yamahacs80@yahoogroups.com, rj krohn <r_j_d_2.phila@...> wrote:
i now believe that i just need a vco chip instead of the entire voice
card-the voice seems to actually trigger, as i tried running the noise
up on it, and the noise is audible.

REALLY? that's interesting. thanks for that tidbit, it helps. i would love it if kent could weigh in on this, he probably knows exactly what im up against. i know for sure that what ive got is:
-key triggers
-HPF and LPF work
-VCA changes level, so i believe VCA chip is good

here's another wierd thing-if i run a scale and separate release and depression of every key, the bad voice shows itself as silence. HOWEVER, if i run a scale WITHOUT separating attack and release of different notes(with legato? dunno the term), or cycle through chords note by note(held notes stay held while new notes are triggered), i am getting a wierd thing SOMETIMES: i wont get a "silent" note, but i WILL get a note that ONLY has its attack-NO sustain. just a "blip", if you will. but it is a note, it is triggered, it just doesnt sustain like the rest of the notes.

the problem is that there is no way for me to confirm this phenomenon is coming from the normally silent voice. but i suspect that those conditions are causing the bad voice to behave as such.

man, its hard finding VCO chips! ive scoured the net, no such luck...

anybody have one to sell? i'll pay, i need it!


Quazimodo <noddyspuncture@...> wrote: I seem to remember I didn't even get 'noise' whith the faulty chip..!

Cheers,
TOM

--- In yamahacs80@yahoogroups.com, rj krohn <r_j_d_2.phila@...> wrote:
i now believe that i just need a vco chip instead of the entire voice
card-the voice seems to actually trigger, as i tried running the noise
up on it, and the noise is audible.






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