Yamaha CS80

Has anyone else come across the quirk whereby if using long release times in Sustain Mode 1, the oscillator pitch drops slowly when the notes are released? Switching to Sustain II brings the notes back to the correct pitch.

I figure this is something to do with the Keyboard SH card, and voltages leaking away from the capacitors.

Any suggestions or previous experiences of this problem welcome!

Thanks,

Lucid.

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

the secret to understanding the sustain switches is this..... When you use sustain 1 , the modulation sources and performance filters are interupted from the oscillator once the key is lifted... you will have a long release, by will not be able to pitch bend that hanging oscillator... so it is in a non controlled state....
-----Original Message-----
From: "lucidsound" <lucidsound@...>
To: <yamahacs80@yahoogroups.com>
Date: 05/12/2011 13:34
Subject: [yamahacs80] Pitch Drop When Using Sustain 1


Has anyone else come across the quirk whereby if using long release times in Sustain Mode 1, the oscillator pitch drops slowly when the notes are released? Switching to Sustain II brings the notes back to the correct pitch.

I figure this is something to do with the Keyboard SH card, and voltages leaking away from the capacitors.

Any suggestions or previous experiences of this problem welcome!

Thanks,

Lucid.

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








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

I understand that part of it, because in Sustain 1 the oscillator voltage is held by the capacitor on the SH card, whereas in Sustain II, the key assign is still connected to the oscillator.

But it seems every one of these synthesisers I've ever worked on and that includes the CS-60, has this problem of oscillator pitch drift when releasing keys when using Sustain 1, some worse than others.

My guess is leakage on the SH card caused by contamination, but I'd like to hear other people's experiences.

If you have a CS-60 or CS-80, select Sustain 1 and set up a long release time, and see if the notes change in pitch during the release cycle.

Lucid.

----- Original Message -----
From: Laurie Curry
To: yamahacs80@yahoogroups.com
Sent: Thursday, May 12, 2011 9:40 PM
Subject: Re: [yamahacs80] Pitch Drop When Using Sustain 1



the secret to understanding the sustain switches is this..... When you use sustain 1 , the modulation sources and performance filters are interupted from the oscillator once the key is lifted... you will have a long release, by will not be able to pitch bend that hanging oscillator... so it is in a non controlled state....
-----Original Message-----
From: "lucidsound" <lucidsound@...>
To: <yamahacs80@yahoogroups.com>
Date: 05/12/2011 13:34
Subject: [yamahacs80] Pitch Drop When Using Sustain 1

Has anyone else come across the quirk whereby if using long release times in Sustain Mode 1, the oscillator pitch drops slowly when the notes are released? Switching to Sustain II brings the notes back to the correct pitch.

I figure this is something to do with the Keyboard SH card, and voltages leaking away from the capacitors.

Any suggestions or previous experiences of this problem welcome!

Thanks,

Lucid.

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

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





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

This reminds me, my CS60 is stuck in Sustain II mode even when the switch is
switched to Sustain I. I don't think the switch is at fault, is there
anything specific on the SH card I should be checking?

-S

On 12 May 2011 22:48, lucidsound <lucidsound@...> wrote:

>
>
> I understand that part of it, because in Sustain 1 the oscillator voltage
> is held by the capacitor on the SH card, whereas in Sustain II, the key
> assign is still connected to the oscillator.
>
> But it seems every one of these synthesisers I've ever worked on and that
> includes the CS-60, has this problem of oscillator pitch drift when
> releasing keys when using Sustain 1, some worse than others.
>
> My guess is leakage on the SH card caused by contamination, but I'd like to
> hear other people's experiences.
>
> If you have a CS-60 or CS-80, select Sustain 1 and set up a long release
> time, and see if the notes change in pitch during the release cycle.
>
> Lucid.
>
>
> ----- Original Message -----
> From: Laurie Curry
> To: yamahacs80@yahoogroups.com
> Sent: Thursday, May 12, 2011 9:40 PM
> Subject: Re: [yamahacs80] Pitch Drop When Using Sustain 1
>
> the secret to understanding the sustain switches is this..... When you use
> sustain 1 , the modulation sources and performance filters are interupted
> from the oscillator once the key is lifted... you will have a long release,
> by will not be able to pitch bend that hanging oscillator... so it is in a
> non controlled state....
> -----Original Message-----
> From: "lucidsound" <lucidsound@...>
> To: <yamahacs80@yahoogroups.com>
> Date: 05/12/2011 13:34
> Subject: [yamahacs80] Pitch Drop When Using Sustain 1
>
> Has anyone else come across the quirk whereby if using long release times
> in Sustain Mode 1, the oscillator pitch drops slowly when the notes are
> released? Switching to Sustain II brings the notes back to the correct
> pitch.
>
> I figure this is something to do with the Keyboard SH card, and voltages
> leaking away from the capacitors.
>
> Any suggestions or previous experiences of this problem welcome!
>
> Thanks,
>
> Lucid.
>
> [Non-text portions of this message have been removed]
>
> [Non-text portions of this message have been removed]
>
> [Non-text portions of this message have been removed]
>
>
>


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

S-

I am having this same fault on a CS60. Will investigate further and
try track down the fault.

AK

On 14/05/2011, at 12:15 AM, skkatter wrote:

> This reminds me, my CS60 is stuck in Sustain II mode even when the
> switch is
> switched to Sustain I. I don't think the switch is at fault, is there
> anything specific on the SH card I should be checking?
>
> -S
>
> On 12 May 2011 22:48, lucidsound <lucidsound@...> wrote:
>
>>
>>
>> I understand that part of it, because in Sustain 1 the oscillator
>> voltage
>> is held by the capacitor on the SH card, whereas in Sustain II, the
>> key
>> assign is still connected to the oscillator.
>>
>> But it seems every one of these synthesisers I've ever worked on
>> and that
>> includes the CS-60, has this problem of oscillator pitch drift when
>> releasing keys when using Sustain 1, some worse than others.
>>
>> My guess is leakage on the SH card caused by contamination, but I'd
>> like to
>> hear other people's experiences.
>>
>> If you have a CS-60 or CS-80, select Sustain 1 and set up a long
>> release
>> time, and see if the notes change in pitch during the release cycle.
>>
>> Lucid.
>>
>>
>> ----- Original Message -----
>> From: Laurie Curry
>> To: yamahacs80@yahoogroups.com
>> Sent: Thursday, May 12, 2011 9:40 PM
>> Subject: Re: [yamahacs80] Pitch Drop When Using Sustain 1
>>
>> the secret to understanding the sustain switches is this..... When
>> you use
>> sustain 1 , the modulation sources and performance filters are
>> interupted
>> from the oscillator once the key is lifted... you will have a long
>> release,
>> by will not be able to pitch bend that hanging oscillator... so it
>> is in a
>> non controlled state....
>> -----Original Message-----
>> From: "lucidsound" <lucidsound@...>
>> To: <yamahacs80@yahoogroups.com>
>> Date: 05/12/2011 13:34
>> Subject: [yamahacs80] Pitch Drop When Using Sustain 1
>>
>> Has anyone else come across the quirk whereby if using long release
>> times
>> in Sustain Mode 1, the oscillator pitch drops slowly when the notes
>> are
>> released? Switching to Sustain II brings the notes back to the
>> correct
>> pitch.
>>
>> I figure this is something to do with the Keyboard SH card, and
>> voltages
>> leaking away from the capacitors.
>>
>> Any suggestions or previous experiences of this problem welcome!
>>
>> Thanks,
>>
>> Lucid.
>>
>> [Non-text portions of this message have been removed]
>>
>> [Non-text portions of this message have been removed]
>>
>> [Non-text portions of this message have been removed]
>>
>>
>>
>
>
> [Non-text portions of this message have been removed]
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>

Andrew Kirkby
(e) kirkbyte@...
(m) 0416 000 070

OK, this is what I found:

I was thinking that it had to be this, that I cut and saved from AH (I think) a few years ago:



"Seems the SH card collects debris over the years from being near the front  
of the machine, underneath the keyboard, and this reduces its effectiveness  
as an insulator. The impedance of the input to the SH amps (CA3140T) is in  
the order of 1.5 T Ohms (1500 Meg Ohms!) and the SH caps are quite small for  
this application (0.22uF) so it doesn't take much to cause that voltage to  
leak away. Some good old household dust plus several gigs in smokey  
theatres (this was the eighties, don't forget) would probably be enough.

I found if I lifted the end of the caps which feed to the CA3140T's from the  
PCB, Pin 3 of the CA3140T's and also the 4066 Gate outputs and wire-linked  
them together away from the surface of the PCB, the problem goes away. There  
is still a very small voltage drop but even with full Sustain (Yamaha-speak  
for Release) the change in pitch isn't noticeable.

I'm guessing this must be a common fault, as the CS-60 card I have exhibits  
the same problem.

Lucid."



jkjelec

----- Original Message -----
From: "lucidsound" <lucidsound@...>
To: yamahacs80@yahoogroups.com
Sent: Thursday, May 12, 2011 2:33:54 PM
Subject: [yamahacs80] Pitch Drop When Using Sustain 1

Has anyone else come across the quirk whereby if using long release times in Sustain Mode 1, the oscillator pitch drops slowly when the notes are released?  Switching to Sustain II brings the notes back to the correct pitch.

I figure this is something to do with the Keyboard SH card, and voltages leaking away from the capacitors.

Any suggestions or previous experiences of this problem welcome!

Thanks,

Lucid.

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



------------------------------------

Yahoo! Groups Links





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

Good grief, did I write that? If I did I'm glad someone preserved it, my memory is not what it was.

I'm still interested to know if anyone else has this problem with a CS-60 or CS-80.

Thanks,

Lucid.

----- Original Message -----
From: jkjelec@...
To: yamahacs80@yahoogroups.com
Sent: Saturday, May 14, 2011 9:13 PM
Subject: Re: [yamahacs80] Pitch Drop When Using Sustain 1





OK, this is what I found:

I was thinking that it had to be this, that I cut and saved from AH (I think) a few years ago:

"Seems the SH card collects debris over the years from being near the front
of the machine, underneath the keyboard, and this reduces its effectiveness
as an insulator. The impedance of the input to the SH amps (CA3140T) is in
the order of 1.5 T Ohms (1500 Meg Ohms!) and the SH caps are quite small for
this application (0.22uF) so it doesn't take much to cause that voltage to
leak away. Some good old household dust plus several gigs in smokey
theatres (this was the eighties, don't forget) would probably be enough.

I found if I lifted the end of the caps which feed to the CA3140T's from the
PCB, Pin 3 of the CA3140T's and also the 4066 Gate outputs and wire-linked
them together away from the surface of the PCB, the problem goes away. There
is still a very small voltage drop but even with full Sustain (Yamaha-speak
for Release) the change in pitch isn't noticeable.

I'm guessing this must be a common fault, as the CS-60 card I have exhibits
the same problem.

Lucid."

jkjelec

----- Original Message -----
From: "lucidsound" <lucidsound@...>
To: yamahacs80@yahoogroups.com
Sent: Thursday, May 12, 2011 2:33:54 PM
Subject: [yamahacs80] Pitch Drop When Using Sustain 1

Has anyone else come across the quirk whereby if using long release times in Sustain Mode 1, the oscillator pitch drops slowly when the notes are released? Switching to Sustain II brings the notes back to the correct pitch.

I figure this is something to do with the Keyboard SH card, and voltages leaking away from the capacitors.

Any suggestions or previous experiences of this problem welcome!

Thanks,

Lucid.

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

------------------------------------

Yahoo! Groups Links

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





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

If anyone wants a voice card from a Yamaha CS-50, I have one for sale.  It works perfect.  I'm  not sure how much to ask for one but I am going to say $300 obo right now.  
Also, if you need any other parts, please let me know, I may still have them available.Thanks,
Steve

--- On Sat, 5/14/11, jkjelec@... <jkjelec@...> wrote:

From: jkjelec@... <jkjelec@...>
Subject: Re: [yamahacs80] Pitch Drop When Using Sustain 1
To: yamahacs80@yahoogroups.com
Date: Saturday, May 14, 2011, 4:13 PM
















 













OK, this is what I found:



I was thinking that it had to be this, that I cut and saved from AH (I think) a few years ago:



"Seems the SH card collects debris over the years from being near the front  

of the machine, underneath the keyboard, and this reduces its effectiveness  

as an insulator. The impedance of the input to the SH amps (CA3140T) is in  

the order of 1.5 T Ohms (1500 Meg Ohms!) and the SH caps are quite small for  

this application (0.22uF) so it doesn't take much to cause that voltage to  

leak away. Some good old household dust plus several gigs in smokey  

theatres (this was the eighties, don't forget) would probably be enough.



I found if I lifted the end of the caps which feed to the CA3140T's from the  

PCB, Pin 3 of the CA3140T's and also the 4066 Gate outputs and wire-linked  

them together away from the surface of the PCB, the problem goes away. There  

is still a very small voltage drop but even with full Sustain (Yamaha-speak  

for Release) the change in pitch isn't noticeable.



I'm guessing this must be a common fault, as the CS-60 card I have exhibits  

the same problem.



Lucid."



jkjelec



----- Original Message -----

From: "lucidsound" <lucidsound@...>

To: yamahacs80@yahoogroups.com

Sent: Thursday, May 12, 2011 2:33:54 PM

Subject: [yamahacs80] Pitch Drop When Using Sustain 1



Has anyone else come across the quirk whereby if using long release times in Sustain Mode 1, the oscillator pitch drops slowly when the notes are released?  Switching to Sustain II brings the notes back to the correct pitch.



I figure this is something to do with the Keyboard SH card, and voltages leaking away from the capacitors.



Any suggestions or previous experiences of this problem welcome!



Thanks,



Lucid.



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



------------------------------------



Yahoo! Groups Links



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



























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

Hi Steve,

I'm keen, i might also need some fader caps and other bits if you have them?


Andrew

> steve kodnel <dzlvs8@...> wrote:
>
> If anyone wants a voice card from a Yamaha CS-50, I have one for sale.
> ����It works perfect. ����I'm ����not sure how much to ask for one but I am
> going to say $300 obo right now. ����
> Also, if you need any other parts, please let me know, I may still have
> them available.Thanks,
> Steve
>
>
> --- On Sat, 5/14/11, jkjelec@... <jkjelec@...> wrote:
>
> From: jkjelec@... <jkjelec@...>
> Subject: Re: [yamahacs80] Pitch Drop When Using Sustain 1
> To: yamahacs80@yahoogroups.com
> Date: Saturday, May 14, 2011, 4:13 PM
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> ����
>
>
>
>
>
>
>
>
>
>
>
>
>
> OK, this is what I found:
>
>
>
> I was thinking that it had to be this, that I cut and saved from AH (I
> think) a few years ago:
>
>
>
> "Seems the SH card collects debris over the years from being near the
> front ����
>
> of the machine, underneath the keyboard, and this reduces its
> effectiveness ����
>
> as an insulator. The impedance of the input to the SH amps (CA3140T) is
> in ����
>
> the order of 1.5 T Ohms (1500 Meg Ohms!) and the SH caps are quite small
> for ����
>
> this application (0.22uF) so it doesn't take much to cause that voltage
> to ����
>
> leak away. Some good old household dust plus several gigs in smokey ����
>
> theatres (this was the eighties, don't forget) would probably be enough.
>
>
>
>
> I found if I lifted the end of the caps which feed to the CA3140T's from
> the ����
>
> PCB, Pin 3 of the CA3140T's and also the 4066 Gate outputs and
> wire-linked ����
>
> them together away from the surface of the PCB, the problem goes away.
> There ����
>
> is still a very small voltage drop but even with full Sustain
> (Yamaha-speak ����
>
> for Release) the change in pitch isn't noticeable.
>
>
>
> I'm guessing this must be a common fault, as the CS-60 card I have
> exhibits ����
>
> the same problem.
>
>
>
> Lucid."
>
>
>
> jkjelec
>
>
>
> ----- Original Message -----
>
> From: "lucidsound" <lucidsound@...>
>
> To: yamahacs80@yahoogroups.com
>
> Sent: Thursday, May 12, 2011 2:33:54 PM
>
> Subject: [yamahacs80] Pitch Drop When Using Sustain 1
>
>
>
> Has anyone else come across the quirk whereby if using long release
> times in Sustain Mode 1, the oscillator pitch drops slowly when the
> notes are released? ����Switching to Sustain II brings the notes back to
> the correct pitch.
>
>
>
> I figure this is something to do with the Keyboard SH card, and voltages
> leaking away from the capacitors.
>
>
>
> Any suggestions or previous experiences of this problem welcome!
>
>
>
> Thanks,
>
>
>
> Lucid.
>
>
>
> [Non-text portions of this message have been removed]
>
>
>
> ------------------------------------
>
>
>
> Yahoo! Groups Links
>
>
>
> [Non-text portions of this message have been removed]
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> [Non-text portions of this message have been removed]

Andy,
So far I have sold a few sliders, two voice cards, the PRA board and a few other odds and ends. If you are still interested in some items, let me know soon. Also, I am pretty sure that if you are just interested in slider caps the cost of shipping wouldnt be worth the caps. But we can talk.
Steve

-----Original message-----
From: kirkbyte@...
To: yamahacs80@yahoogroups.com
Sent: Sun, May 15, 2011 01:01:29 GMT+00:00
Subject: Re: [yamahacs80] Yamaha Voice Card for Sale

Hi Steve,

I'm keen, i might also need some fader caps and other bits if you have them?


Andrew

> steve kodnel <dzlvs8@...> wrote:
>
> If anyone wants a voice card from a Yamaha CS-50, I have one for sale.
> ����It works perfect. ����I'm ����not sure how much to ask for one but I am
> going to say $300 obo right now. ����
> Also, if you need any other parts, please let me know, I may still have
> them available.Thanks,
> Steve
>
>
> --- On Sat, 5/14/11, jkjelec@... <jkjelec@...> wrote:
>
> From: jkjelec@... <jkjelec@...>
> Subject: Re: [yamahacs80] Pitch Drop When Using Sustain 1
> To: yamahacs80@yahoogroups.com
> Date: Saturday, May 14, 2011, 4:13 PM
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> ����
>
>
>
>
>
>
>
>
>
>
>
>
>
> OK, this is what I found:
>
>
>
> I was thinking that it had to be this, that I cut and saved from AH (I
> think) a few years ago:
>
>
>
> "Seems the SH card collects debris over the years from being near the
> front ����
>
> of the machine, underneath the keyboard, and this reduces its
> effectiveness ����
>
> as an insulator. The impedance of the input to the SH amps (CA3140T) is
> in ����
>
> the order of 1.5 T Ohms (1500 Meg Ohms!) and the SH caps are quite small
> for ����
>
> this application (0.22uF) so it doesn't take much to cause that voltage
> to ����
>
> leak away. Some good old household dust plus several gigs in smokey ����
>
> theatres (this was the eighties, don't forget) would probably be enough.
>
>
>
>
> I found if I lifted the end of the caps which feed to the CA3140T's from
> the ����
>
> PCB, Pin 3 of the CA3140T's and also the 4066 Gate outputs and
> wire-linked ����
>
> them together away from the surface of the PCB, the problem goes away.
> There ����
>
> is still a very small voltage drop but even with full Sustain
> (Yamaha-speak ����
>
> for Release) the change in pitch isn't noticeable.
>
>
>
> I'm guessing this must be a common fault, as the CS-60 card I have
> exhibits ����
>
> the same problem.
>
>
>
> Lucid."
>
>
>
> jkjelec
>
>
>
> ----- Original Message -----
>
> From: "lucidsound" <lucidsound@...>
>
> To: yamahacs80@yahoogroups.com
>
> Sent: Thursday, May 12, 2011 2:33:54 PM
>
> Subject: [yamahacs80] Pitch Drop When Using Sustain 1
>
>
>
> Has anyone else come across the quirk whereby if using long release
> times in Sustain Mode 1, the oscillator pitch drops slowly when the
> notes are released? ����Switching to Sustain II brings the notes back to
> the correct pitch.
>
>
>
> I figure this is something to do with the Keyboard SH card, and voltages
> leaking away from the capacitors.
>
>
>
> Any suggestions or previous experiences of this problem welcome!
>
>
>
> Thanks,
>
>
>
> Lucid.
>
>
>
> [Non-text portions of this message have been removed]
>
>
>
> ------------------------------------
>
>
>
> Yahoo! Groups Links
>
>
>
> [Non-text portions of this message have been removed]
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> [Non-text portions of this message have been removed]

------------------------------------

Yahoo! Groups Links





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

Do you have the coarse and fine tune pot? How about the TKC board?

I need an optocoupler too, but can' remember if there is another one on the CS-50 that isn't on the PRA board.

-Mike

--- In yamahacs80@yahoogroups.com, "dzlvs8@..." <dzlvs8@...> wrote:
>
> Andy,
> So far I have sold a few sliders, two voice cards, the PRA board and a few other odds and ends. If you are still interested in some items, let me know soon. Also, I am pretty sure that if you are just interested in slider caps the cost of shipping wouldnt be worth the caps. But we can talk.
> Steve
>
> -----Original message-----
> From: kirkbyte@...
> To: yamahacs80@yahoogroups.com
> Sent: Sun, May 15, 2011 01:01:29 GMT+00:00
> Subject: Re: [yamahacs80] Yamaha Voice Card for Sale
>
> Hi Steve,
>
> I'm keen, i might also need some fader caps and other bits if you have them?
>
>
> Andrew
>
> > steve kodnel <dzlvs8@...> wrote:
> >
> > If anyone wants a voice card from a Yamaha CS-50, I have one for sale.
> > ����It works perfect. ����I'm ����not sure how much to ask for one but I am
> > going to say $300 obo right now. ����
> > Also, if you need any other parts, please let me know, I may still have
> > them available.Thanks,
> > Steve
> >
> >
> > --- On Sat, 5/14/11, jkjelec@... <jkjelec@...> wrote:
> >
> > From: jkjelec@... <jkjelec@...>
> > Subject: Re: [yamahacs80] Pitch Drop When Using Sustain 1
> > To: yamahacs80@yahoogroups.com
> > Date: Saturday, May 14, 2011, 4:13 PM
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > ����
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > OK, this is what I found:
> >
> >
> >
> > I was thinking that it had to be this, that I cut and saved from AH (I
> > think) a few years ago:
> >
> >
> >
> > "Seems the SH card collects debris over the years from being near the
> > front ����
> >
> > of the machine, underneath the keyboard, and this reduces its
> > effectiveness ����
> >
> > as an insulator. The impedance of the input to the SH amps (CA3140T) is
> > in ����
> >
> > the order of 1.5 T Ohms (1500 Meg Ohms!) and the SH caps are quite small
> > for ����
> >
> > this application (0.22uF) so it doesn't take much to cause that voltage
> > to ����
> >
> > leak away. Some good old household dust plus several gigs in smokey ����
> >
> > theatres (this was the eighties, don't forget) would probably be enough.
> >
> >
> >
> >
> > I found if I lifted the end of the caps which feed to the CA3140T's from
> > the ����
> >
> > PCB, Pin 3 of the CA3140T's and also the 4066 Gate outputs and
> > wire-linked ����
> >
> > them together away from the surface of the PCB, the problem goes away.
> > There ����
> >
> > is still a very small voltage drop but even with full Sustain
> > (Yamaha-speak ����
> >
> > for Release) the change in pitch isn't noticeable.
> >
> >
> >
> > I'm guessing this must be a common fault, as the CS-60 card I have
> > exhibits ����
> >
> > the same problem.
> >
> >
> >
> > Lucid."
> >
> >
> >
> > jkjelec
> >
> >
> >
> > ----- Original Message -----
> >
> > From: "lucidsound" <lucidsound@...>
> >
> > To: yamahacs80@yahoogroups.com
> >
> > Sent: Thursday, May 12, 2011 2:33:54 PM
> >
> > Subject: [yamahacs80] Pitch Drop When Using Sustain 1
> >
> >
> >
> > Has anyone else come across the quirk whereby if using long release
> > times in Sustain Mode 1, the oscillator pitch drops slowly when the
> > notes are released? ����Switching to Sustain II brings the notes back to
> > the correct pitch.
> >
> >
> >
> > I figure this is something to do with the Keyboard SH card, and voltages
> > leaking away from the capacitors.
> >
> >
> >
> > Any suggestions or previous experiences of this problem welcome!
> >
> >
> >
> > Thanks,
> >
> >
> >
> > Lucid.
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
> >
> >
> > ------------------------------------
> >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > [Non-text portions of this message have been removed]
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>
>
>
> [Non-text portions of this message have been removed]
>

I had this problem with a CS-60.  Several of the voices were leaking like this.  I had changed all of the relevant parts that could result in sample and hold droop, but the problem remained.  I cleaned the PCBA using alcohol, but it didn't help.  I suspected it was the PC board leaking, and had independently considered doing the modification you posted.  However it wasn't my synth; I was repaing it for someone.  I thought just how bad it would look if I did this massive, ugly modifcation, and it didn't help in the end.   So I told my customer I couldn't fix it. 

Then I saw your post, and I was thrilled to see you had licked this problem.  Strangely enough, the customer ended up moving to a different area of the globe, and the problem seems to have gone away on its own!  I suspected that the synth was now in a dryer area, and so the the PCB had "dried up" and stopped leaking...but the customer says the new area is humid, and so I am scratching my head.



I think the CS-50, 60, and 80 all use the same SH board (the CS-50 only has 4 of 8 circuits populated), so I think the problem could occur on all of these units.



Regards,



jkjelec

----- Original Message -----
From: "lucidsound" <lucidsound@...>
To: yamahacs80@yahoogroups.com
Sent: Saturday, May 14, 2011 4:31:02 PM
Subject: Re: [yamahacs80] Pitch Drop When Using Sustain 1

Good grief, did I write that? If I did I'm glad someone preserved it, my memory is not what it was.

I'm still interested to know if anyone else has this problem with a CS-60 or CS-80.

Thanks,

Lucid.

  ----- Original Message -----
  From: jkjelec@...
  To: yamahacs80@yahoogroups.com
  Sent: Saturday, May 14, 2011 9:13 PM
  Subject: Re: [yamahacs80] Pitch Drop When Using Sustain 1


    


  OK, this is what I found:

  I was thinking that it had to be this, that I cut and saved from AH (I think) a few years ago:

  "Seems the SH card collects debris over the years from being near the front  
  of the machine, underneath the keyboard, and this reduces its effectiveness  
  as an insulator. The impedance of the input to the SH amps (CA3140T) is in  
  the order of 1.5 T Ohms (1500 Meg Ohms!) and the SH caps are quite small for  
  this application (0.22uF) so it doesn't take much to cause that voltage to  
  leak away. Some good old household dust plus several gigs in smokey  
  theatres (this was the eighties, don't forget) would probably be enough.

  I found if I lifted the end of the caps which feed to the CA3140T's from the  
  PCB, Pin 3 of the CA3140T's and also the 4066 Gate outputs and wire-linked  
  them together away from the surface of the PCB, the problem goes away. There  
  is still a very small voltage drop but even with full Sustain (Yamaha-speak  
  for Release) the change in pitch isn't noticeable.

  I'm guessing this must be a common fault, as the CS-60 card I have exhibits  
  the same problem.

  Lucid."

  jkjelec

  ----- Original Message -----
  From: "lucidsound" <lucidsound@...>
  To: yamahacs80@yahoogroups.com
  Sent: Thursday, May 12, 2011 2:33:54 PM
  Subject: [yamahacs80] Pitch Drop When Using Sustain 1

  Has anyone else come across the quirk whereby if using long release times in Sustain Mode 1, the oscillator pitch drops slowly when the notes are released?  Switching to Sustain II brings the notes back to the correct pitch.

  I figure this is something to do with the Keyboard SH card, and voltages leaking away from the capacitors.

  Any suggestions or previous experiences of this problem welcome!

  Thanks,

  Lucid.

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

  ------------------------------------

  Yahoo! Groups Links

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



  

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



------------------------------------

Yahoo! Groups Links





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

FYI - I have sold quite a few components out of my CS50.  Therefore, there is no turning back now.  So if anyone needs anything out of my CS50, let me know.  I will TRY to come up with a fair price.  I've found it very hard to assign an appropriate value for any of this stuff!!!  Does anyone know how much Best Buy sells voice cards and CS slider caps for???  lol      Anyway,  please let me know if you are interested.  
I dont think I ever posted a video here of the CS50 that all this is coming from.  Here is a link to the video.  ....Although, Im not sure if I can post links to videos in this group.  Anyway, here it is.  Its a boring video though.

http://www.youtube.com/watch?v=SxW6LU0wE2A
If the link doesnt show up, search "Yamaha CS50 Demonstration" in youtube.
Steve

> steve kodnel <dzlvs8@...> wrote:
>
> If anyone wants a voice card from a Yamaha CS-50, I have one for sale.
>  It works perfect.  I'm  not sure how much to ask for one but I am
> going to say $300 obo right now.  
> Also, if you need any other parts, please let me know, I may still have
> them available.Thanks,
> Steve

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

A friend of mine is looking for a working, good condition ribbon controller. His CS 80 needs a new one.
Any for sale on the Net?
It's not me.
if you have anyone, please contact me offlist and I give you the contact


Thanks

Fernando

Get yourself an inoperative YC-45D organ. Kent refurbishes/fixes ribbons as well, I believe.

Stephen

----- Original Message -----
From: Fernando Zarone
To: yamahacs80@yahoogroups.com
Sent: Wednesday, May 18, 2011 10:38 AM
Subject: [yamahacs80] Looking for a CS80/60 ribbon controller



A friend of mine is looking for a working, good condition ribbon controller. His CS 80 needs a new one.
Any for sale on the Net?
It's not me.
if you have anyone, please contact me offlist and I give you the contact

Thanks

Fernando





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

--- In yamahacs80@yahoogroups.com, Fernando Zarone <fernandozarone@...> wrote:

>
> A friend of mine is looking for a working, good condition ribbon controller. His CS 80 needs a new one.
> Any for sale on the Net?
> It's not me.
> if you have anyone, please contact me offlist and I give you the contact
>
>
> Thanks
>
> Fernando
>

Hi,you can send it to Kent Spong he is able to fix it

Regards

Gianni

Well, after cleaning the PCB which made a small but insignificant difference, I ended up doing this exact modification to a CS-60 this week, and am happy to say it worked. Long release times on Sustain 1, and the pitch stays exactly where it should.

I'm just surprised that more people haven't commented on this problem, as it would seem to be fairly widespread - if the CS machines that I see are anything to go by.

A friend of mine has just acquired an absolutely beautifully preserved CS-60, even the chrome trim around the edges of the case looks like it just came from the factory. I shall be interested to see if that one has the Sustain 1 problem.

Lucid.

----- Original Message -----
From: jkjelec@...
To: yamahacs80@yahoogroups.com
Sent: Tuesday, May 17, 2011 10:38 PM
Subject: Re: [yamahacs80] Pitch Drop When Using Sustain 1





I had this problem with a CS-60. Several of the voices were leaking like this. I had changed all of the relevant parts that could result in sample and hold droop, but the problem remained. I cleaned the PCBA using alcohol, but it didn't help. I suspected it was the PC board leaking, and had independently considered doing the modification you posted. However it wasn't my synth; I was repaing it for someone. I thought just how bad it would look if I did this massive, ugly modifcation, and it didn't help in the end. So I told my customer I couldn't fix it.

Then I saw your post, and I was thrilled to see you had licked this problem. Strangely enough, the customer ended up moving to a different area of the globe, and the problem seems to have gone away on its own! I suspected that the synth was now in a dryer area, and so the the PCB had "dried up" and stopped leaking...but the customer says the new area is humid, and so I am scratching my head.

I think the CS-50, 60, and 80 all use the same SH board (the CS-50 only has 4 of 8 circuits populated), so I think the problem could occur on all of these units.

Regards,

jkjelec

----- Original Message -----
From: "lucidsound" <lucidsound@...>
To: yamahacs80@yahoogroups.com
Sent: Saturday, May 14, 2011 4:31:02 PM
Subject: Re: [yamahacs80] Pitch Drop When Using Sustain 1

Good grief, did I write that? If I did I'm glad someone preserved it, my memory is not what it was.

I'm still interested to know if anyone else has this problem with a CS-60 or CS-80.

Thanks,

Lucid.

----- Original Message -----
From: jkjelec@...
To: yamahacs80@yahoogroups.com
Sent: Saturday, May 14, 2011 9:13 PM
Subject: Re: [yamahacs80] Pitch Drop When Using Sustain 1



OK, this is what I found:

I was thinking that it had to be this, that I cut and saved from AH (I think) a few years ago:

"Seems the SH card collects debris over the years from being near the front
of the machine, underneath the keyboard, and this reduces its effectiveness
as an insulator. The impedance of the input to the SH amps (CA3140T) is in
the order of 1.5 T Ohms (1500 Meg Ohms!) and the SH caps are quite small for
this application (0.22uF) so it doesn't take much to cause that voltage to
leak away. Some good old household dust plus several gigs in smokey
theatres (this was the eighties, don't forget) would probably be enough.

I found if I lifted the end of the caps which feed to the CA3140T's from the
PCB, Pin 3 of the CA3140T's and also the 4066 Gate outputs and wire-linked
them together away from the surface of the PCB, the problem goes away. There
is still a very small voltage drop but even with full Sustain (Yamaha-speak
for Release) the change in pitch isn't noticeable.

I'm guessing this must be a common fault, as the CS-60 card I have exhibits
the same problem.

Lucid."

jkjelec

----- Original Message -----
From: "lucidsound" <lucidsound@...>
To: yamahacs80@yahoogroups.com
Sent: Thursday, May 12, 2011 2:33:54 PM
Subject: [yamahacs80] Pitch Drop When Using Sustain 1

Has anyone else come across the quirk whereby if using long release times in Sustain Mode 1, the oscillator pitch drops slowly when the notes are released? Switching to Sustain II brings the notes back to the correct pitch.

I figure this is something to do with the Keyboard SH card, and voltages leaking away from the capacitors.

Any suggestions or previous experiences of this problem welcome!

Thanks,

Lucid.

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

------------------------------------

Yahoo! Groups Links

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



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

------------------------------------

Yahoo! Groups Links

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





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

I have no idea. I do still have the M board that contains the Ig chips. If you find out if the chips I have will work, let me know.
Steve
810-931-0725

-----Original message-----
From: morfix <jayserber@...>
To: yamahacs80@yahoogroups.com
Sent: Tue, May 31, 2011 01:12:49 GMT+00:00
Subject: [yamahacs80] Re: Yamaha Voice Card for Sale

do you have the IG chips that would fit my ymaha cs-15?

thanks!

--- In yamahacs80@yahoogroups.com, steve kodnel <dzlvs8@...> wrote:
>
> FYI - I have sold quite a few components out of my CS50.  Therefore, there is no turning back now.  So if anyone needs anything out of my CS50, let me know.  I will TRY to come up with a fair price.  I've found it very hard to assign an appropriate value for any of this stuff!!!  Does anyone know how much Best Buy sells voice cards and CS slider caps for???  lol      Anyway,  please let me know if you are interested.  
> I dont think I ever posted a video here of the CS50 that all this is coming from.  Here is a link to the video.  ....Although, Im not sure if I can post links to videos in this group.  Anyway, here it is.  Its a boring video though.
>
> http://www.youtube.com/watch?v=SxW6LU0wE2A
> If the link doesnt show up, search "Yamaha CS50 Demonstration" in youtube.
> Steve
>
>
> > steve kodnel <dzlvs8@...> wrote:
> >
> > If anyone wants a voice card from a Yamaha CS-50, I have one for sale.
> >  It works perfect.  I'm  not sure how much to ask for one but I am
> > going to say $300 obo right now.  
> > Also, if you need any other parts, please let me know, I may still have
> > them available.Thanks,
> > Steve
>
>
> [Non-text portions of this message have been removed]
>




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

these are the chips i would need:

IG00150
IG00151
IG00153
IG00156

and thank you so much for your reply!!!! much appreciated,

thanks
Jason

On Mon, May 30, 2011 at 10:24 PM, dzlvs8@... <dzlvs8@...> wrote:

>
>
> I have no idea. I do still have the M board that contains the Ig chips. If
> you find out if the chips I have will work, let me know.
> Steve
> 810-931-0725
>
>
> -----Original message-----
> From: morfix <jayserber@...>
> To: yamahacs80@yahoogroups.com
> Sent: Tue, May 31, 2011 01:12:49 GMT+00:00
> Subject: [yamahacs80] Re: Yamaha Voice Card for Sale
>
> do you have the IG chips that would fit my ymaha cs-15?
>
> thanks!
>
> --- In yamahacs80@yahoogroups.com, steve kodnel <dzlvs8@...> wrote:
> >
> > FYI - I have sold quite a few components out of my CS50. Therefore,
> there is no turning back now. So if anyone needs anything out of my CS50,
> let me know. I will TRY to come up with a fair price. I've found it very
> hard to assign an appropriate value for any of this stuff!!! Does anyone
> know how much Best Buy sells voice cards and CS slider caps for??? lol
> Anyway, please let me know if you are interested.
> > I dont think I ever posted a video here of the CS50 that all this is
> coming from. Here is a link to the video. ....Although, Im not sure if I
> can post links to videos in this group. Anyway, here it is. Its a boring
> video though.
> >
> > http://www.youtube.com/watch?v=SxW6LU0wE2A
> > If the link doesnt show up, search "Yamaha CS50 Demonstration" in
> youtube.
> > Steve
> >
> >
> > > steve kodnel <dzlvs8@...> wrote:
> > >
> > > If anyone wants a voice card from a Yamaha CS-50, I have one for sale.
> > > � It works perfect. � I'm � not sure how much to ask for one but I am
> > > going to say $300 obo right now. �
> > > Also, if you need any other parts, please let me know, I may still have
>
> > > them available.Thanks,
> > > Steve
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
> [Non-text portions of this message have been removed]
>
>
>


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