开云体育

ctrl + shift + ? for shortcuts
© 2025 开云体育
  1. YamahaCS80fans
  2. Messages
Expanded Topics Messages Polls
Date
Re: CS-80 almost working again! (no aftertouch and missing a voice)

Heath Finnie
 

--- In yamahacs80@..., rj krohn <r_j_d_2.phila@...> wrote:

if it stopped working at a point that doesnt coincide with you opening the machine up, then "something has failed" would be my first assumption. if your voltages are reading properly on the aftertouch board, that's another vote towards component failure.
I will probably redo the whole boards. I just wasn't sure if one components failure would kill the aftertouch on every key for VCO, VCF and VCA.

also, remember that sustaining a voice and switching thru presets doesnt exercise the envelopes, so the surefire process of elimination is to trigger the faulty voice on numerous presets.
That was also the case. I tried it every way hitting the key over and over, switching presets, back again went to panel and out.
Re: CS-80 almost working again! (no aftertouch and missing a voice)

 

if it stopped working at a point that doesnt coincide with you opening the machine up, then "something has failed" would be my first assumption. if your voltages are reading properly on the aftertouch board, that's another vote towards component failure.

also, remember that sustaining a voice and switching thru presets doesnt exercise the envelopes, so the surefire process of elimination is to trigger the faulty voice on numerous presets.

--- On Mon, 3/30/09, Heath Finnie <heathfinnie@...> wrote:

From: Heath Finnie <heathfinnie@...>
Subject: [yamahacs80] Re: CS-80 almost working again! (no aftertouch and missing a voice)
To: yamahacs80@...
Date: Monday, March 30, 2009, 8:25 PM














are you sure that every panel function works in either of the memory slots for voice 3? i have seen a particular function of a voice fail(vcf,eg, etc), and it appears as certain presets not functioning.


After about 30 minutes it started working. It was weird. It was working in every preset including the memory channels. As soon as I selected panel it would go silent. Press Brass it would come back again.



also, on the aftertouch, when i re-chipped and socketed all the lower boards, i had a bad new CMOS chip on the LARGER board(tks? cant remember name now). it caused the aftertouch to go out completely. all i remember was that it was in the row farthest away from the manual.....


The thing I wonder about is I had it working when I got it about 4 months ago. I didn't replace any chips and now it doesn't work globally.
Re: CS-80 almost working again! (no aftertouch and missing a voice)

Heath Finnie
 

are you sure that every panel function works in either of the memory slots for voice 3? i have seen a particular function of a voice fail(vcf,eg,etc), and it appears as certain presets not functioning.

After about 30 minutes it started working. It was weird. It was working in every preset including the memory channels. As soon as I selected panel it would go silent. Press Brass it would come back again.


also, on the aftertouch, when i re-chipped and socketed all the lower boards, i had a bad new CMOS chip on the LARGER board(tks? cant remember name now). it caused the aftertouch to go out completely. all i remember was that it was in the row farthest away from the manual.....
The thing I wonder about is I had it working when I got it about 4 months ago. I didn't replace any chips and now it doesn't work globally.
Re: CS-80 almost working again! (no aftertouch and missing a voice)

 

"No voice 3 on channel 2, but ONLY in panel mode???? This seems like a weird issue...

"
are you sure that every panel function works in either of the memory slots for voice 3? i have seen a particular function of a voice fail(vcf,eg,etc), and it appears as certain presets not functioning.

also, on the aftertouch, when i re-chipped and socketed all the lower boards, i had a bad new CMOS chip on the LARGER board(tks? cant remember name now). it caused the aftertouch to go out completely. all i remember was that it was in the row farthest away from the manual.....

--- On Mon, 3/30/09, Heath Finnie <heathfinnie@...> wrote:

From: Heath Finnie <heathfinnie@...>
Subject: [yamahacs80] CS-80 almost working again! (no aftertouch and missing a voice)
To: yamahacs80@...
Date: Monday, March 30, 2009, 6:56 PM












Thought I would update the list on my CS-80 work thats been going on. I had help in fixing some of these problems which is great since some of them to me were stumpers.



Here is what has been done:



Power supply rebuilt

Ring Modulator envelope fixed (bad IG00159)

Output hi/low switch rebuilt

constant pitch/loss of pitch controls (bad trace on the BA board)

Funky 3 would not sound (bad transistor on the BA board)



Some things that are left to do and a bit of a mystery:



No aftertouch. (The aftertouch worked when I got the synth but now I have none on any key on either channel which makes me think its something global. The voltages seem to be fine on the TKS board....)



No voice 3 on channel 2, but ONLY in panel mode???? This seems like a weird issue...



And last will be a full calibration.
Re: CS-80 almost working again! (no aftertouch and missing a voice)

 

Heath, have a closer check on your TSB boards - that's where my problem regarding aftertouch was...!

Good luck,
TOM

--- In yamahacs80@..., "Heath Finnie" <heathfinnie@...> wrote:
No aftertouch. (The aftertouch worked when I got the synth but now I have none on any key on either channel which makes me think its something global. The voltages seem to be fine on the TKS board....)
CS-80 almost working again! (no aftertouch and missing a voice)

Heath Finnie
 

Thought I would update the list on my CS-80 work thats been going on. I had help in fixing some of these problems which is great since some of them to me were stumpers.

Here is what has been done:

Power supply rebuilt
Ring Modulator envelope fixed (bad IG00159)
Output hi/low switch rebuilt
constant pitch/loss of pitch controls (bad trace on the BA board)
Funky 3 would not sound (bad transistor on the BA board)

Some things that are left to do and a bit of a mystery:

No aftertouch. (The aftertouch worked when I got the synth but now I have none on any key on either channel which makes me think its something global. The voltages seem to be fine on the TKS board....)

No voice 3 on channel 2, but ONLY in panel mode???? This seems like a weird issue...

And last will be a full calibration.
Re: the best substitute for a cs-80

David
 

How can you play two CS-50's in unison--do they both need the Kenton
midi mod?

On 31/03/2009, at 1:14 AM, Richard Atkinson wrote:

My vote for a CS-80 substitute goes to two CS-50s. You can play them
together in unison with different settings and get *a lot* of the
CS-80 sound.

Yes the CS-70M does have the dual channel structure, and more
sophisticated LFOs, but where I think it falls down is in the
filtering. The CS-70M only provides a single (multi-mode) filter per
channel voice, whereas the CS-50, CS-60 and CS-80 all share that
resonant high pass into low pass structure which I think is
responsible for *a lot* of the polyphonic CS sound.

From: Fredrik Segerfalk
Sent: Monday, March 30, 2009 12:54 PM
To: yamahacs80@...
Subject: Re: [yamahacs80] the best substitute for a cs-80

You have obviously never tried a CS70m.

Fredrik Segerfalk
www.analogsweden.com

Wavecomputer360 wrote:


A CS70M has about as much in common with a CS80 as, say, a Polymoog
with a Memorymoog.

Stephen

__________________________________________________________

"Ambition makes you look pretty ugly, kicking squealing Gucci little
piggy." (Thom Yorke/Radiohead -- "Paranoid Android")

Stephen Parsick live in concert: Bochum Planetarium (Germany),
13th of
December, 2008, 08:00 pm.

Finally available: Stephen Parsick -- Traces of the Past Redux,
reissued with three previously unreleased bonus tracks. For more
info
please check www.parsick.com

For legal downloads please check:


<


----- Original Message -----
From: Jo Jo Hillingsworth
To: yamahacs80@... <mailto:yamahacs80%40yahoogroups.com>
Sent: Monday, March 30, 2009 1:05 AM
Subject: [yamahacs80] the best substitute for a cs-80

I've only become obsessed with the CS-80 for the past several
months...since I don't have $20k to throw down on one, what is the
next best option? I've seen a lot of people talk about the CS-60 as
the next best thing, but what about the CS-70m? Or is there another
Yamaha CS model out there that I am missing?
Re: the best substitute for a cs-80

 

Oh, I have, but I wasn?t impressed. It is nice in its own right -- like a Polymoog certainly is -- but it has nothing that would make me want to own one. If you buy it as a CS80 replacement, you will be disappointed.

Stephen

____________________________________________________________________

"Ambition makes you look pretty ugly, kicking squealing Gucci little piggy." (Thom Yorke/Radiohead -- "Paranoid Android")

Stephen Parsick live in concert: Bochum Planetarium (Germany), 13th of December, 2008, 08:00 pm.

Finally available: Stephen Parsick -- Traces of the Past Redux, reissued with three previously unreleased bonus tracks. For more info please check www.parsick.com

For legal downloads please check:

----- Original Message -----
From: Fredrik Segerfalk
To: yamahacs80@...
Sent: Monday, March 30, 2009 1:54 PM
Subject: Re: [yamahacs80] the best substitute for a cs-80


You have obviously never tried a CS70m.

Fredrik Segerfalk
www.analogsweden.com

Wavecomputer360 wrote:
>
>
> A CS70M has about as much in common with a CS80 as, say, a Polymoog
> with a Memorymoog.
>
> Stephen
>
> __________________________________________________________
>
> "Ambition makes you look pretty ugly, kicking squealing Gucci little
> piggy." (Thom Yorke/Radiohead -- "Paranoid Android")
>
> Stephen Parsick live in concert: Bochum Planetarium (Germany), 13th of
> December, 2008, 08:00 pm.
>
> Finally available: Stephen Parsick -- Traces of the Past Redux,
> reissued with three previously unreleased bonus tracks. For more info
> please check www.parsick.com
>
> For legal downloads please check:
>
>
> <>
>
> ----- Original Message -----
> From: Jo Jo Hillingsworth
> To: yamahacs80@... <mailto:yamahacs80%40yahoogroups.com>
> Sent: Monday, March 30, 2009 1:05 AM
> Subject: [yamahacs80] the best substitute for a cs-80
>
> I've only become obsessed with the CS-80 for the past several
> months...since I don't have $20k to throw down on one, what is the
> next best option? I've seen a lot of people talk about the CS-60 as
> the next best thing, but what about the CS-70m? Or is there another
> Yamaha CS model out there that I am missing?
>
> [Non-text portions of this message have been removed]
>
>





[Non-text portions of this message have been removed]
Re: the best substitute for a cs-80

 

and, as implied, a polymoog can get pretty close SONICALLY(obviously not performance-wise).

--- On Mon, 3/30/09, Richard Atkinson <rga24@...> wrote:

From: Richard Atkinson <rga24@...>
Subject: Re: [yamahacs80] the best substitute for a cs-80
To: yamahacs80@...
Date: Monday, March 30, 2009, 8:14 AM












My vote for a CS-80 substitute goes to two CS-50s. You can play them together in unison with different settings and get *a lot* of the CS-80 sound.



Yes the CS-70M does have the dual channel structure, and more sophisticated LFOs, but where I think it falls down is in the filtering. The CS-70M only provides a single (multi-mode) filter per channel voice, whereas the CS-50, CS-60 and CS-80 all share that resonant high pass into low pass structure which I think is responsible for *a lot* of the polyphonic CS sound.



From: Fredrik Segerfalk

Sent: Monday, March 30, 2009 12:54 PM

To: yamahacs80@yahoogro ups.com

Subject: Re: [yamahacs80] the best substitute for a cs-80



You have obviously never tried a CS70m.



Fredrik Segerfalk

www.analogsweden. com



Wavecomputer360 wrote:

A CS70M has about as much in common with a CS80 as, say, a Polymoog
with a Memorymoog.
Stephen
____________ _________ _________ _________ _________ _________ _
"Ambition makes you look pretty ugly, kicking squealing Gucci little
piggy." (Thom Yorke/Radiohead -- "Paranoid Android")
Stephen Parsick live in concert: Bochum Planetarium (Germany), 13th of
December, 2008, 08:00 pm.
Finally available: Stephen Parsick -- Traces of the Past Redux,
reissued with three previously unreleased bonus tracks. For more info
please check www.parsick. com
For legal downloads please check:
t.com/directory. php?artist= 296&title= Stephen+Parsick
< t.com/directory. php?artist= 296&title= Stephen+Parsick>
----- Original Message -----
From: Jo Jo Hillingsworth
To: yamahacs80@yahoogro ups.com <mailto:yamahacs80% 40yahoogroups. com>
Sent: Monday, March 30, 2009 1:05 AM
Subject: [yamahacs80] the best substitute for a cs-80
I've only become obsessed with the CS-80 for the past several
months...since I don't have $20k to throw down on one, what is the
next best option? I've seen a lot of people talk about the CS-60 as
the next best thing, but what about the CS-70m? Or is there another
Yamaha CS model out there that I am missing?
Re: the best substitute for a cs-80

 

My vote for a CS-80 substitute goes to two CS-50s. You can play them together in unison with different settings and get *a lot* of the CS-80 sound.

Yes the CS-70M does have the dual channel structure, and more sophisticated LFOs, but where I think it falls down is in the filtering. The CS-70M only provides a single (multi-mode) filter per channel voice, whereas the CS-50, CS-60 and CS-80 all share that resonant high pass into low pass structure which I think is responsible for *a lot* of the polyphonic CS sound.



From: Fredrik Segerfalk
Sent: Monday, March 30, 2009 12:54 PM
To: yamahacs80@...
Subject: Re: [yamahacs80] the best substitute for a cs-80


You have obviously never tried a CS70m.

Fredrik Segerfalk
www.analogsweden.com

Wavecomputer360 wrote:


A CS70M has about as much in common with a CS80 as, say, a Polymoog
with a Memorymoog.

Stephen

__________________________________________________________

"Ambition makes you look pretty ugly, kicking squealing Gucci little
piggy." (Thom Yorke/Radiohead -- "Paranoid Android")

Stephen Parsick live in concert: Bochum Planetarium (Germany), 13th of
December, 2008, 08:00 pm.

Finally available: Stephen Parsick -- Traces of the Past Redux,
reissued with three previously unreleased bonus tracks. For more info
please check www.parsick.com

For legal downloads please check:


<>

----- Original Message -----
From: Jo Jo Hillingsworth
To: yamahacs80@... <mailto:yamahacs80%40yahoogroups.com>
Sent: Monday, March 30, 2009 1:05 AM
Subject: [yamahacs80] the best substitute for a cs-80

I've only become obsessed with the CS-80 for the past several
months...since I don't have $20k to throw down on one, what is the
next best option? I've seen a lot of people talk about the CS-60 as
the next best thing, but what about the CS-70m? Or is there another
Yamaha CS model out there that I am missing?
Re: the best substitute for a cs-80

 

You have obviously never tried a CS70m.

Fredrik Segerfalk
www.analogsweden.com

Wavecomputer360 wrote:



A CS70M has about as much in common with a CS80 as, say, a Polymoog with a Memorymoog.

Stephen

__________________________________________________________

"Ambition makes you look pretty ugly, kicking squealing Gucci little piggy." (Thom Yorke/Radiohead -- "Paranoid Android")

Stephen Parsick live in concert: Bochum Planetarium (Germany), 13th of December, 2008, 08:00 pm.

Finally available: Stephen Parsick -- Traces of the Past Redux, reissued with three previously unreleased bonus tracks. For more info please check www.parsick.com

For legal downloads please check:

<>

----- Original Message -----
From: Jo Jo Hillingsworth
To: yamahacs80@... <mailto:yamahacs80%40yahoogroups.com>
Sent: Monday, March 30, 2009 1:05 AM
Subject: [yamahacs80] the best substitute for a cs-80

I've only become obsessed with the CS-80 for the past several months...since I don't have $20k to throw down on one, what is the next best option? I've seen a lot of people talk about the CS-60 as the next best thing, but what about the CS-70m? Or is there another Yamaha CS model out there that I am missing?
Re: the best substitute for a cs-80

 

You might want to give the GX-1 a try :-).

Seriously, I think a CS60 comes closest to the 80 in terms of performance, and even a CS50 can do a lot of the tricks -- if not the best, alas -- of the 80. If you?re only after the sound, these smaller model will do.

A CS70M has about as much in common with a CS80 as, say, a Polymoog with a Memorymoog.

Stephen

____________________________________________________________________

"Ambition makes you look pretty ugly, kicking squealing Gucci little piggy." (Thom Yorke/Radiohead -- "Paranoid Android")

Stephen Parsick live in concert: Bochum Planetarium (Germany), 13th of December, 2008, 08:00 pm.

Finally available: Stephen Parsick -- Traces of the Past Redux, reissued with three previously unreleased bonus tracks. For more info please check www.parsick.com

For legal downloads please check:

----- Original Message -----
From: Jo Jo Hillingsworth
To: yamahacs80@...
Sent: Monday, March 30, 2009 1:05 AM
Subject: [yamahacs80] the best substitute for a cs-80


I've only become obsessed with the CS-80 for the past several months...since I don't have $20k to throw down on one, what is the next best option? I've seen a lot of people talk about the CS-60 as the next best thing, but what about the CS-70m? Or is there another Yamaha CS model out there that I am missing?
Re: the best substitute for a cs-80

 

The closest thing is imo the CS70m. You lose the velocity sensitivity and some other features, but in all it's a great synth with the same VCO, VCF etc as the CS-80 + you get the 2 vco/voice, which you don't get with the 60 or 50. I have the 60,70 and 80, so I know what I'm talking about :)

Check out these excellent demos:





Fredrik Segerfalk
www.analogsweden.com

Jo Jo Hillingsworth wrote:


I've only become obsessed with the CS-80 for the past several months...since I don't have $20k to throw down on one, what is the next best option? I've seen a lot of people talk about the CS-60 as the next best thing, but what about the CS-70m? Or is there another Yamaha CS model out there that I am missing?
Re: sub oscillator external in / portamento question / detune slider

erikfromhere
 

Thanks. However, the korg MS-04 seems to be an expensive solution I'm afraid.
Maybe it makes sense to install a modification on the CS80:
Changing the external-in jack from an input to a situation that it sends out a copy of the sine-subosc-wave. Connecting a cheap, passive pedal (Tip-Sleeve, just with a resistor in it) makes it possible to control the depth of this signal by feet while changing speed by applying aftertouch. I guess this is a simple mod for those who practice electronics.

Or am I thinking to simple. Maybe you'll have to install an opamp that is fed by the sine-wave to achieve this and control the amplification of this opamp with the pedal ?

--- In yamahacs80@..., "Vorderwinkler Karl" <karl.vorderwinkler@...> wrote:

The Korg MS-04 pedal might be what you are looking for. It works with a 9V
DC or battery and belongs to the vintage MS-02/10/20/50 family. It is
amazingly solid and very flexible.
If you really want to replace your 2600, send it to me and I`ll send you
my MS-04 in exchange... (c:

Regards,
Paul.


Just tried to feed a sine-wave from an ARP2600 into the
sub-osc-external-in on the back of the CS80. I controlled the amplitude of
the sinewave by controlling the APR's VCA with a cv-pedal. That works very
good for Oberheim-type of vibrato's.
I tried 2 settings:
+/- 40mV
+/- 400mV
and both work great by adjusting the external-in-knob on the back.

It would be nice to replace my 2600 for a foot-pedal with that function
;-) It would require an active (battery-power) pedal with adjustable
speed. Does such a pedal exist ?
the best substitute for a cs-80

Jo Jo Hillingsworth
 

I've only become obsessed with the CS-80 for the past several months...since I don't have $20k to throw down on one, what is the next best option? I've seen a lot of people talk about the CS-60 as the next best thing, but what about the CS-70m? Or is there another Yamaha CS model out there that I am missing?
Re: sub oscillator external in / portamentoquestion / detune slider

 

This is an audio input guys....not a pedal port.....
It utilizes the input as a Frequency/Amplitude Modulator to the Sub oscillator (or FM to the CS80 Sub Mix as Carrier.)
I send Mic level unbalanced to it, using the level ajustment as a pad.....

-----Original message-----
From: "Vorderwinkler Karl" karl.vorderwinkler@...
Date: Sun, 29 Mar 2009 14:46:34 -0600
To: yamahacs80@...
Subject: Re: [yamahacs80] Re: sub oscillator external in / portamentoquestion / detune slider

The Korg MS-04 pedal might be what you are looking for. It works with a 9V
DC or battery and belongs to the vintage MS-02/10/20/50 family. It is
amazingly solid and very flexible.
If you really want to replace your 2600, send it to me and I`ll send you
my MS-04 in exchange... (c:

Regards,
Paul.


Just tried to feed a sine-wave from an ARP2600 into the
sub-osc-external-in on the back of the CS80. I controlled the amplitude of
the sinewave by controlling the APR's VCA with a cv-pedal. That works very
good for Oberheim-type of vibrato's.
I tried 2 settings:
+/- 40mV
+/- 400mV
and both work great by adjusting the external-in-knob on the back.

It would be nice to replace my 2600 for a foot-pedal with that function
;-) It would require an active (battery-power) pedal with adjustable
speed. Does such a pedal exist ?
Re: sub oscillator external in / portamento question / detune slider

Vorderwinkler Karl
 

The Korg MS-04 pedal might be what you are looking for. It works with a 9V
DC or battery and belongs to the vintage MS-02/10/20/50 family. It is
amazingly solid and very flexible.
If you really want to replace your 2600, send it to me and I`ll send you
my MS-04 in exchange... (c:

Regards,
Paul.

Just tried to feed a sine-wave from an ARP2600 into the
sub-osc-external-in on the back of the CS80. I controlled the amplitude of
the sinewave by controlling the APR's VCA with a cv-pedal. That works very
good for Oberheim-type of vibrato's.
I tried 2 settings:
+/- 40mV
+/- 400mV
and both work great by adjusting the external-in-knob on the back.

It would be nice to replace my 2600 for a foot-pedal with that function
;-) It would require an active (battery-power) pedal with adjustable
speed. Does such a pedal exist ?
Re: sub oscillator external in / portamento question / detune slider

erikfromhere
 

Just tried to feed a sine-wave from an ARP2600 into the sub-osc-external-in on the back of the CS80. I controlled the amplitude of the sinewave by controlling the APR's VCA with a cv-pedal. That works very good for Oberheim-type of vibrato's.
I tried 2 settings:
+/- 40mV
+/- 400mV
and both work great by adjusting the external-in-knob on the back.

It would be nice to replace my 2600 for a foot-pedal with that function ;-) It would require an active (battery-power) pedal with adjustable speed. Does such a pedal exist ?

--- In yamahacs80@..., "erikfromhere" <moogsynthex@...> wrote:

Speaking about pedals, I like the way I can control vibrato-depth on
my Oberheims with a footpedal. I know, the CS80 has aftertouch to act
as a source for vibrato-depth but I find it difficult to use this on
chords.

I was thinking, there is an external input for the sub oscillator.
What if I take a sine-wave and use a cv-pedal to control the
amplitude of that wave (using a modular synth's oscillator and vca)
and feed it to the sub-osc ? Can I control vibrato-depth ? Does
anybody know what the maximum voltage is that may be fed into this
input ?

Why did Yamaha implement this external source ? Did they have a foot-
pedal available that provided a controllable sine-wave ? I never use
any pedals with the CS80 but if it could control vibrato-depth I
would use all the time ;-)
Re: Help with 8.5v rail

 

I don't think that that is the problem. I'm getting 22 volts off of the rails and a voltage drop of 15 volts across the zener. I would think that that 820 would go out if it was shorted. Oh, I'm getting a 1.2v or 1.8v drop across the 820 ohm resistor. (I didn't look at the board layout to see exactly which one is which)

Thanks for the response.

--- In yamahacs80@..., "zenithaudio2003" <zenithaudio2003@...> wrote:

Hi i ad a similar problem with a minimoog , it was the zener refence zener diode , i think on the cs-80 it is the d715 , it is thermaly insulated . Look if this zener is not open or shorted . On the mini ps the diode didnt seem bad , but this was the problem .. I hope it will help .. here is the picture ...

--- In yamahacs80@..., "mborish_2000" <mborish_2000@> wrote:

You mean a BD234 or 2sd234 right? Thanks for responding Kent. I'm going to give it a shot. On another note, do you sell extraction springs for the ribbon controller?

-Mike

--- In yamahacs80@..., kent spong <kent_spong@> wrote:


Hi


I would replace the tip31 and instead use a BD324



,


To: yamahacs80@...
From: mborish_2000@
Date: Thu, 26 Mar 2009 16:44:01 +0000
Subject: [yamahacs80] Help with 8.5v rail

A few months ago, I accidentally shorted the 8.5v rail to ground while calibrating VR723. (I know, I'm an idiot.) Common sense told me to take out TR709, check it and replace. I replaced TR709 with a TIP31C as well as IC722 and still have the same problem on the output: 3 volts and some change. I Removed the lead and get about 7.8 volts with the PSU unloaded and a little bit less with a 1M ohm load. The metal oxide resistor reads about 8/10 of an ohm in circuit.

I was wondering if anybody could post what some of the voltages are in their CS-80 PSU for me. It would be nice if I could have the voltages from TR711, TR710, D713 and IC722



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

Yahoo! Groups Links



_________________________________________________________________
View your Twitter and Flickr updates from one place – Learn more!


[Non-text portions of this message have been removed]
Re: Help with 8.5v rail

zenithaudio2003
 

Hi i ad a similar problem with a minimoog , it was the zener refence zener diode , i think on the cs-80 it is the d715 , it is thermaly insulated . Look if this zener is not open or shorted . On the mini ps the diode didnt seem bad , but this was the problem .. I hope it will help .. here is the picture ...

--- In yamahacs80@..., "mborish_2000" <mborish_2000@...> wrote:

You mean a BD234 or 2sd234 right? Thanks for responding Kent. I'm going to give it a shot. On another note, do you sell extraction springs for the ribbon controller?

-Mike

--- In yamahacs80@..., kent spong <kent_spong@> wrote:


Hi


I would replace the tip31 and instead use a BD324



,


To: yamahacs80@...
From: mborish_2000@
Date: Thu, 26 Mar 2009 16:44:01 +0000
Subject: [yamahacs80] Help with 8.5v rail

A few months ago, I accidentally shorted the 8.5v rail to ground while calibrating VR723. (I know, I'm an idiot.) Common sense told me to take out TR709, check it and replace. I replaced TR709 with a TIP31C as well as IC722 and still have the same problem on the output: 3 volts and some change. I Removed the lead and get about 7.8 volts with the PSU unloaded and a little bit less with a 1M ohm load. The metal oxide resistor reads about 8/10 of an ohm in circuit.

I was wondering if anybody could post what some of the voltages are in their CS-80 PSU for me. It would be nice if I could have the voltages from TR711, TR710, D713 and IC722



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

Yahoo! Groups Links



_________________________________________________________________
View your Twitter and Flickr updates from one place – Learn more!


[Non-text portions of this message have been removed]
2441 - 2460 of 4958