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One CS-80 is not enough ...

Re: [yamahacs80] One CS-80 is not enough ...

2007-11-09 by David Rogoff

JH. wrote:
> While I'm waiting for shipment of my CS-80, I've been looking around on the
> web and found this:
>
> I also wonder, what kind of keyboard stand holds the _upper_ one ...
>

Well, it looks cool on the custom stand, but I don't think it would work very well. The CS80's key feel is from weights at the back of the keys. If you tilt it like that, it wouldn't feel or bounce back right. I'd also be worried about the thing falling over. Ouch!

David

dormant CS-80 proceedure

2007-11-10 by Wayne Griffin

I have a CS-80 (#1480) that hasn't been powered on in
years. I am afraid what might happen if I just flip
the mains switch.

Are there any recommendations on what's the best
method to bring one back up that's been off for so
long? I thought I might try and use a variac. Let me
know please. cheers, [w]



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Re: dormant CS-80 proceedure

2007-11-10 by blchrr@homecall.co.uk

get it up to room temp for a day or two, if your a techy why not replace the
smoothing caps in the psu, and then fire the old girl up, you might be
surprised to find its all OK?
Ill keep everything crossed for you, let us know how you get on!

Show quoted textHide quoted text
> I have a CS-80 (#1480) that hasn't been powered on in
> years. I am afraid what might happen if I just flip
> the mains switch.
>
> Are there any recommendations on what's the best
> method to bring one back up that's been off for so
> long? I thought I might try and use a variac. Let me
> know please. cheers, [w]
>
>
>
> __________________________________________________
> Do You Yahoo!?
> Tired of spam? Yahoo! Mail has the best spam protection around
> http://mail.yahoo.com



Regards,
Rob Belcher
www.myspace.com/duplx

Re: [yamahacs80] dormant CS-80 proceedure

2007-11-10 by rj krohn

good instincts. changing the psu capacitors is not too hard. youll probably have to order the 5600mfd/40v caps, other values should be at your local store. digikey is quick delivery/processing if youre in the states, might as well get em all there.

its always a smart preventative idea. seems like a waste of time until that one time you power up something, a cap fails, and you wind up burning out something downstream. that's a REAL pain. been there, it blows.

Wayne Griffin <ingsoc_1979@...> wrote: I have a CS-80 (#1480) that hasn't been powered on in
years. I am afraid what might happen if I just flip
the mains switch.

Are there any recommendations on what's the best
method to bring one back up that's been off for so
long? I thought I might try and use a variac. Let me
know please. cheers, [w]

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Re: [yamahacs80] dormant CS-80 proceedure

2007-11-10 by Wayne Griffin

Thanks guys! I am absolutely no stranger at all to the
recap operation. I have a lot of gear and have rebuilt
several power supplies.

Regarding the caps, should I go all out "Computer
Grade"? What brands and temp ratings have you all used
in your rebuilds?

Has anyone ever tried the variac thing with an old
synth?

I was thinking I could ramp up the voltage over the
course of about a day- but I wasn't really certain how
the regulators would take to that. I thought you could
ramp it up and then hit the reset line on the CPU but
maybe that's just wishful thinking.

Should the regulators be changed as well?

I don't have the service manual to the CS-80. Can
anyone tell me what the electrolytic values are? Where
is the best place to obtain a copy of this legendary
doc? cheers, [w]



--- rj krohn <r_j_d_2.phila@...> wrote:

> good instincts. changing the psu capacitors is not
> too hard. youll probably have to order the
> 5600mfd/40v caps, other values should be at your
> local store. digikey is quick delivery/processing if
> youre in the states, might as well get em all there.
>
> its always a smart preventative idea. seems like a
> waste of time until that one time you power up
> something, a cap fails, and you wind up burning out
> something downstream. that's a REAL pain. been
> there, it blows.
>
> Wayne Griffin <ingsoc_1979@...> wrote:
> I have a CS-80 (#1480) that
> hasn't been powered on in
> years. I am afraid what might happen if I just flip
> the mains switch.
>
> Are there any recommendations on what's the best
> method to bring one back up that's been off for so
> long? I thought I might try and use a variac. Let
> me
> know please. cheers, [w]
>
> __________________________________________________
> Do You Yahoo!?
> Tired of spam? Yahoo! Mail has the best spam
> protection around
> http://mail.yahoo.com
>
>
>
>
> __________________________________________________
> Do You Yahoo!?
> Tired of spam? Yahoo! Mail has the best spam
> protection around
> http://mail.yahoo.com
>
> [Non-text portions of this message have been
> removed]
>
>


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Re: [yamahacs80] dormant CS-80 proceedure

2007-11-10 by Gustavo E.E. Grinóvero

Hi Wayne,
If you are tech enough, I suggest you that you unplug the output of the power suppy and load it with a dummy (resistors) load.
I don't remember the resistors values for each output accordig to the voltage and nominal it should drain.
As a general gude think of resistors of low values (less than 50 ohms) and more than 15Watts.
If you need a help with this let me know.

This way if any voltage output is out of its nominal value, you don'y blow ICs (VCAs, VCFs, VCOs., etc.).
I don't suggest you using a variac.
I should have some parts of the manual over there, if you don't find it in another place let me know and I will look for them.


GEEG.

----- Original Message -----
Show quoted textHide quoted text
From: Wayne Griffin
To: yamahacs80@yahoogroups.com
Sent: Saturday, November 10, 2007 3:15 PM
Subject: Re: [yamahacs80] dormant CS-80 proceedure


Thanks guys! I am absolutely no stranger at all to the
recap operation. I have a lot of gear and have rebuilt
several power supplies.

Regarding the caps, should I go all out "Computer
Grade"? What brands and temp ratings have you all used
in your rebuilds?

Has anyone ever tried the variac thing with an old
synth?

I was thinking I could ramp up the voltage over the
course of about a day- but I wasn't really certain how
the regulators would take to that. I thought you could
ramp it up and then hit the reset line on the CPU but
maybe that's just wishful thinking.

Should the regulators be changed as well?

I don't have the service manual to the CS-80. Can
anyone tell me what the electrolytic values are? Where
is the best place to obtain a copy of this legendary
doc? cheers, [w]

--- rj krohn <r_j_d_2.phila@...> wrote:

> good instincts. changing the psu capacitors is not
> too hard. youll probably have to order the
> 5600mfd/40v caps, other values should be at your
> local store. digikey is quick delivery/processing if
> youre in the states, might as well get em all there.
>
> its always a smart preventative idea. seems like a
> waste of time until that one time you power up
> something, a cap fails, and you wind up burning out
> something downstream. that's a REAL pain. been
> there, it blows.
>
> Wayne Griffin <ingsoc_1979@...> wrote:
> I have a CS-80 (#1480) that
> hasn't been powered on in
> years. I am afraid what might happen if I just flip
> the mains switch.
>
> Are there any recommendations on what's the best
> method to bring one back up that's been off for so
> long? I thought I might try and use a variac. Let
> me
> know please. cheers, [w]
>
> __________________________________________________
> Do You Yahoo!?
> Tired of spam? Yahoo! Mail has the best spam
> protection around
> http://mail.yahoo.com
>
>
>
>
> __________________________________________________
> Do You Yahoo!?
> Tired of spam? Yahoo! Mail has the best spam
> protection around
> http://mail.yahoo.com
>
> [Non-text portions of this message have been
> removed]
>
>

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RE: [yamahacs80] One CS-80 is not enough ...

2007-11-16 by Thorsten P.

Hello Jürgen so you finally decided to get the real one - the one and only, did you plan to keep your cs-50? ;-)) But something is wrong on that pictures of the two cs I wonder what could it be? ;-)) RegardsThorsten


To: yamahacs80@yahoogroups.comFrom: jhaible@...: Fri, 9 Nov 2007 20:15:29 +0100Subject: [yamahacs80] One CS-80 is not enough ...


While I'm waiting for shipment of my CS-80, I've been looking around on the web and found this:http://www.vangelismovements.com/PolydorBoxPage07B.jpgDoes this mean the hunt isn't over yet?! :)I also wonder, what kind of keyboard stand holds the _upper_ one ...JH.







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RE: [yamahacs80] One CS-80 is not enough ...

2007-11-16 by Thorsten P.

Hello Jürgen so you finally decided to get the real one - the one and only, did you plan to keep your cs-50? ;-)) But something is wrong on that pictures of the two cs I wonder what could it be? ;-)) RegardsThorsten


To: yamahacs80@yahoogroups.comFrom: jhaible@...: Fri, 9 Nov 2007 20:15:29 +0100Subject: [yamahacs80] One CS-80 is not enough ...


While I'm waiting for shipment of my CS-80, I've been looking around on the web and found this:http://www.vangelismovements.com/PolydorBoxPage07B.jpgDoes this mean the hunt isn't over yet?! :)I also wonder, what kind of keyboard stand holds the _upper_ one ...JH.







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RE: [yamahacs80] One CS-80 is not enough ...

2007-11-16 by Thorsten P.

Hello Jürgen so you finally decided to get the real one - the one and only, did you plan to keep your cs-50? ;-)) But something is wrong on that pictures of the two cs I wonder what could it be? ;-)) RegardsThorsten


To: yamahacs80@yahoogroups.comFrom: jhaible@...: Fri, 9 Nov 2007 20:15:29 +0100Subject: [yamahacs80] One CS-80 is not enough ...


While I'm waiting for shipment of my CS-80, I've been looking around on the web and found this:http://www.vangelismovements.com/PolydorBoxPage07B.jpgDoes this mean the hunt isn't over yet?! :)I also wonder, what kind of keyboard stand holds the _upper_ one ...JH.







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