Yamaha CS-15: no envelopes....
2008-08-02 by gil_we
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2008-08-02 by gil_we
I got a nice shaped CS-15 which acts strangely... No matter how I set it, no of the envelopes make any changes in sound, and it acts like it is in "hold" status all the time (no attack, full sustain and no release, just playing endlessly). All other functions work and all keys respond. Where would you recommend to start ?
2008-08-02 by Miguel Mendoza
----- Original Message -----From: gil_weSent: Saturday, August 02, 2008 4:42 PMSubject: [vintagesynthrepair] Yamaha CS-15: no envelopes....I got a nice shaped CS-15 which acts strangely...
No matter how I set it, no of the envelopes make any changes in sound,
and it acts like it is in "hold" status all the time (no attack, full
sustain and no release, just playing endlessly).
All other functions work and all keys respond.
Where would you recommend to start ?
2008-08-02 by gil_we
Interesting... Giving the fact that both EG don't work, what common part for both EG's could cause this ?... --- In vintagesynthrepair@yahoogroups.com, "Miguel Mendoza" <miguel@...> wrote: > > Hello, same problem here with one envelope of my CS-30. In my case I think that the problem is on the IG00159 but I never could find a replacement. Have a look to this, if you find a replacement, please let me know ;-)
> > Regards. > Miguel. > > ----- Original Message ----- > From: gil_we > To: vintagesynthrepair@yahoogroups.com > Sent: Saturday, August 02, 2008 4:42 PM > Subject: [vintagesynthrepair] Yamaha CS-15: no envelopes.... > > > I got a nice shaped CS-15 which acts strangely... > > No matter how I set it, no of the envelopes make any changes in sound, > and it acts like it is in "hold" status all the time (no attack, full > sustain and no release, just playing endlessly). > > All other functions work and all keys respond. > > Where would you recommend to start ? >
2008-08-03 by duncan
>>the problem is on the IG00159<< almost certainly, but check the CV going to it also- you may just have a bad slider somewhere. fwiw, yamaha in the UK were able to supply me with parts for my own cs30 (including some of these proprietary yamaha chips- a VCF in my case) & also parts & a service manual for my 1975 cs50. very impressive. duncan.
2008-08-03 by gil_we
So do you think that it is likely thay BOTH of the IG00159 went bad ?.... As I said, both EG sections don't respond... --- In vintagesynthrepair@yahoogroups.com, "duncan" <ferrograph@...> wrote:
> > >>the problem is on the IG00159<< > > almost certainly, but check the CV going to it also- you may just have > a bad slider somewhere. > fwiw, yamaha in the UK were able to supply me with parts for my own > cs30 (including some of these proprietary yamaha chips- a VCF in my > case) & also parts & a service manual for my 1975 cs50. very impressive. > > duncan. >
2008-08-03 by duncan
>>So do you think that it is likely thay BOTH of the IG00159 went bad ?.... > > As I said, both EG sections don't respond...<< dammit. I misread cs15 for cs5.... um.... no, that sounds like something else. it could be two faders gone bad, or else the synth has had some power-supply mishap in the past that killed both eg chips.... I would have to look at the schemos. I expect that part of the cs15 to be broadly similar to the eg2/eg3 of the cs30. ok, theories presently... :-) d.
2008-08-03 by Miguel Mendoza
----- Original Message -----From: duncanSent: Sunday, August 03, 2008 11:23 PMSubject: [vintagesynthrepair] Re: Yamaha CS-15: no envelopes....>>So do you think that it is likely thay BOTH of the IG00159 went bad
?....
>
> As I said, both EG sections don't respond...<<
dammit. I misread cs15 for cs5.... um.... no, that sounds like
something else. it could be two faders gone bad, or else the synth has
had some power-supply mishap in the past that killed both eg chips....
I would have to look at the schemos. I expect that part of the cs15 to
be broadly similar to the eg2/eg3 of the cs30. ok, theories presently...
:-)
d.
2008-08-04 by gil_we
Thanks guy, no I haven't tried to fire with external gate - how will you do that ? I'll certainly check voltages asap and report ! --- In vintagesynthrepair@yahoogroups.com, "Miguel Mendoza" <miguel@...> wrote: > > Did you try to fire the envelopes by external gate? > > ----- Original Message ----- > From: duncan > To: vintagesynthrepair@yahoogroups.com > Sent: Sunday, August 03, 2008 11:23 PM > Subject: [vintagesynthrepair] Re: Yamaha CS-15: no envelopes.... > > > >>So do you think that it is likely thay BOTH of the IG00159 went bad > ?.... > > > > As I said, both EG sections don't respond...<< > > dammit. I misread cs15 for cs5.... um.... no, that sounds like > something else. it could be two faders gone bad, or else the synth has > had some power-supply mishap in the past that killed both eg chips.... > I would have to look at the schemos. I expect that part of the cs15 to > be broadly similar to the eg2/eg3 of the cs30. ok, theories presently...
> > :-) > > d. >
2008-08-04 by Miguel Mendoza
----- Original Message -----From: gil_weSent: Monday, August 04, 2008 10:36 AMSubject: [vintagesynthrepair] Re: Yamaha CS-15: no envelopes....Thanks guy,
no I haven't tried to fire with external gate - how will you do that ?
I'll certainly check voltages asap and report !
--- In vintagesynthrepair@yahoogroups.com, "Miguel Mendoza"
wrote:
>
> Did you try to fire the envelopes by external gate?
>
> ----- Original Message -----
> From: duncan
> To: vintagesynthrepair@yahoogroups.com
> Sent: Sunday, August 03, 2008 11:23 PM
> Subject: [vintagesynthrepair] Re: Yamaha CS-15: no envelopes....
>
>
> >>So do you think that it is likely thay BOTH of the IG00159 went bad
> ?....
> >
> > As I said, both EG sections don't respond...<<
>
> dammit. I misread cs15 for cs5.... um.... no, that sounds like
> something else. it could be two faders gone bad, or else the synth has
> had some power-supply mishap in the past that killed both eg chips....
> I would have to look at the schemos. I expect that part of the cs15 to
> be broadly similar to the eg2/eg3 of the cs30. ok, theories
presently...
>
> :-)
>
> d.
>
2008-08-06 by Erik Forsling
Actually, zero volts shoud be ok, so you just need to short the input. Use a switching pedal (like a sustain pedal), or just hook up a cable and short the poles. /Erik Forsling --- In vintagesynthrepair@yahoogroups.com, "Miguel Mendoza" <miguel@...> wrote: > > You'll need a midi-CV converter or any other synth or module that could send a voltage. At this moment I don't remember exactly but I think that the pulse has to be negative. > > > > ----- Original Message ----- > From: gil_we > To: vintagesynthrepair@yahoogroups.com > Sent: Monday, August 04, 2008 10:36 AM > Subject: [vintagesynthrepair] Re: Yamaha CS-15: no envelopes.... > > > Thanks guy, > > no I haven't tried to fire with external gate - how will you do that ?
> > I'll certainly check voltages asap and report ! > >
2008-08-08 by gil_we
Thanks, but what do you mean by "short the input" ? and what should I hear once I do that ? Do you mean like shorting the input with ground ?.... --- In vintagesynthrepair@yahoogroups.com, "Erik Forsling" <erik.forsling@...> wrote:
> > Actually, zero volts shoud be ok, so you just need to short the > input. Use a switching pedal (like a sustain pedal), or just hook up > a cable and short the poles. > > /Erik Forsling > > --- In vintagesynthrepair@yahoogroups.com, "Miguel Mendoza" > <miguel@> wrote: > > > > You'll need a midi-CV converter or any other synth or module that > could send a voltage. At this moment I don't remember exactly but I > think that the pulse has to be negative. > > > > > > > > ----- Original Message ----- > > From: gil_we > > To: vintagesynthrepair@yahoogroups.com > > Sent: Monday, August 04, 2008 10:36 AM > > Subject: [vintagesynthrepair] Re: Yamaha CS-15: no envelopes.... > > > > > > Thanks guy, > > > > no I haven't tried to fire with external gate - how will you do > that ? > > > > I'll certainly check voltages asap and report ! > > > > >
2008-08-09 by gil_we
Well, I found that the endless notes are actually a feature on the CS15... Rise up the Initial Level pots and you're there ;) --- In vintagesynthrepair@yahoogroups.com, "gil_we" <gil_we@...> wrote:
> > Thanks, > > but what do you mean by "short the input" ? and what should I hear > once I do that ? > > Do you mean like shorting the input with ground ?.... > > > > > --- In vintagesynthrepair@yahoogroups.com, "Erik Forsling" > <erik.forsling@> wrote: > > > > Actually, zero volts shoud be ok, so you just need to short the > > input. Use a switching pedal (like a sustain pedal), or just hook up > > a cable and short the poles. > > > > /Erik Forsling > > > > --- In vintagesynthrepair@yahoogroups.com, "Miguel Mendoza" > > <miguel@> wrote: > > > > > > You'll need a midi-CV converter or any other synth or module that > > could send a voltage. At this moment I don't remember exactly but I > > think that the pulse has to be negative. > > > > > > > > > > > > ----- Original Message ----- > > > From: gil_we > > > To: vintagesynthrepair@yahoogroups.com > > > Sent: Monday, August 04, 2008 10:36 AM > > > Subject: [vintagesynthrepair] Re: Yamaha CS-15: no envelopes.... > > > > > > > > > Thanks guy, > > > > > > no I haven't tried to fire with external gate - how will you do > > that ? > > > > > > I'll certainly check voltages asap and report ! > > > > > > > > >
2008-08-11 by Erik Forsling
I meant shorting the tip and the ring. The ring should be ground, and the tip should be something like the base of a pnp-transistor. I don't have the schematics at hand, so I can't check. But it seems I was wrong. Sorry. I just tried on my CS-15, and it doesn't work. That's strange, because I know I've used a double pedal from a diathermy machine (sic!) to trigger the envelopes. But that was a long time ago... /Erik --- In vintagesynthrepair@yahoogroups.com, "gil_we" <gil_we@...> wrote: > > Thanks, > > but what do you mean by "short the input" ? and what should I hear > once I do that ? > > Do you mean like shorting the input with ground ?.... > > > > > --- In vintagesynthrepair@yahoogroups.com, "Erik Forsling" > <erik.forsling@> wrote: > > > > Actually, zero volts shoud be ok, so you just need to short the > > input. Use a switching pedal (like a sustain pedal), or just hook up > > a cable and short the poles. > > > > /Erik Forsling > > > > --- In vintagesynthrepair@yahoogroups.com, "Miguel Mendoza" > > <miguel@> wrote: > > > > > > You'll need a midi-CV converter or any other synth or module that > > could send a voltage. At this moment I don't remember exactly but I > > think that the pulse has to be negative. > > > > > > > > > > > > ----- Original Message ----- > > > From: gil_we > > > To: vintagesynthrepair@yahoogroups.com > > > Sent: Monday, August 04, 2008 10:36 AM > > > Subject: [vintagesynthrepair] Re: Yamaha CS-15: no envelopes.... > > > > > > > > > Thanks guy, > > > > > > no I haven't tried to fire with external gate - how will you do
> > that ? > > > > > > I'll certainly check voltages asap and report ! > > > > > > > > >
2008-08-12 by gil_we
Thanks for the advice, However, it appears that this EG behavior is a feature - Rise up the Initial Level pot of each oscillator and they will play without using the keyboard... --- In vintagesynthrepair@yahoogroups.com, "Erik Forsling" <erik.forsling@...> wrote:
> > I meant shorting the tip and the ring. The ring should be ground, and > the tip should be something like the base of a pnp-transistor. I > don't have the schematics at hand, so I can't check. > > But it seems I was wrong. Sorry. I just tried on my CS-15, and it > doesn't work. That's strange, because I know I've used a double pedal > from a diathermy machine (sic!) to trigger the envelopes. But that > was a long time ago... > > /Erik > > --- In vintagesynthrepair@yahoogroups.com, "gil_we" <gil_we@> > wrote: > > > > Thanks, > > > > but what do you mean by "short the input" ? and what should I hear > > once I do that ? > > > > Do you mean like shorting the input with ground ?.... > > > > > > > > > > --- In vintagesynthrepair@yahoogroups.com, "Erik Forsling" > > <erik.forsling@> wrote: > > > > > > Actually, zero volts shoud be ok, so you just need to short the > > > input. Use a switching pedal (like a sustain pedal), or just hook > up > > > a cable and short the poles. > > > > > > /Erik Forsling > > > > > > --- In vintagesynthrepair@yahoogroups.com, "Miguel Mendoza" > > > <miguel@> wrote: > > > > > > > > You'll need a midi-CV converter or any other synth or module > that > > > could send a voltage. At this moment I don't remember exactly but > I > > > think that the pulse has to be negative. > > > > > > > > > > > > > > > > ----- Original Message ----- > > > > From: gil_we > > > > To: vintagesynthrepair@yahoogroups.com > > > > Sent: Monday, August 04, 2008 10:36 AM > > > > Subject: [vintagesynthrepair] Re: Yamaha CS-15: no > envelopes.... > > > > > > > > > > > > Thanks guy, > > > > > > > > no I haven't tried to fire with external gate - how will you > do > > > that ? > > > > > > > > I'll certainly check voltages asap and report ! > > > > > > > > > > > > > >
2008-08-22 by Mu
I'm latching on to this thread - I've got a CS40M with the same symptoms - and not due to the initial level setting. The output is rather low, and noise turns unstable at some filter settings. It was salvaged from a poorly reputed tech who gave up on it - So far I've checked all pots and sliders, and replaced 80 % of the tantal- and electrolytic caps. Any and all help welcome. -Mu --- In vintagesynthrepair@yahoogroups.com, "gil_we" <gil_we@...> wrote:
> > I got a nice shaped CS-15 which acts strangely... > > No matter how I set it, no of the envelopes make any changes in sound, > and it acts like it is in "hold" status all the time (no attack, full > sustain and no release, just playing endlessly). > > All other functions work and all keys respond. > > Where would you recommend to start ? >
2009-02-11 by Miguel Mendoza
2009-02-11 by martinreuter
Hi Miguel, i restored my Minimoog Keyboard with the set from Virtual-Music - it is really fantastic!! It feels now like playing a brand new organ, you can play it fast like the wind and it is very quiet while playing - no clicks or so. Last week i got a NOS Minimoog Keyboard - i was the first man who touched it with his fingers - and it�s not half so good. Installing ist not difficult, you need a secound-glew (quick-glew or so, i don�t know the english word for a very fast drying glew) and a quiet afternoon. Restoring the minis keys took about 3 hours. I was very impressed about this cheap, easy and wonderful solution! The original rubber-bushings would get old very fast and they are not so.....perfect. You will think that you own a brand new keyboard and it will run better than new - believe me! OK, it will be a harder job to restore a complete Proph 10 Keyboard, because you have some more keys....I would help you, but i am sitting here in germany....;-) Best regards Martin
2009-02-11 by Miguel Mendoza
----- Original Message -----From: martinreuterSent: Wednesday, February 11, 2009 9:19 PMSubject: [vintagesynthrepair] Re: Prophet 10 keyboardHi Miguel,
i restored my Minimoog Keyboard with the set from Virtual-Music - it is really fantastic!!
It feels now like playing a brand new organ, you can play it fast like the wind and it is very
quiet while playing - no clicks or so. Last week i got a NOS Minimoog Keyboard - i was the
first man who touched it with his fingers - and it´s not half so good.
Installing ist not difficult, you need a secound-glew (quick-glew or so, i don´t know the
english word for a very fast drying glew) and a quiet afternoon. Restoring the minis keys
took about 3 hours. I was very impressed about this cheap, easy and wonderful solution!
The original rubber-bushings would get old very fast and they are not so.....perfect.
You will think that you own a brand new keyboard and it will run better than new - believe
me!
OK, it will be a harder job to restore a complete Proph 10 Keyboard, because you have some
more keys....I would help you, but i am sitting here in germany....;-)
Best regards
Martin
2009-02-12 by gerryrdahl
Hi Miguel, I just finished re-assembly of a Prophet 10 lower keyboard. I get to do the upper this weekend. I have not used that kit, but I have the replacement bushings. The trick is to use the correct lubricant. I can get the 61 key bushing kits for $25.00 so it is a good price for a new keyboard feel. I have done Polymoogs and several prophets with these bushings and had no trouble with them not lasting. About the Prophet 10 lower keyboard removal... First remove the metal plate under the upper keyboard. There are 2 screws on each side. You will have to remove the sequencer if equipped to get this metal plate out. Then there are six, two inch long screws that hold it in. I did remove the lower plate, just so I could see what was going on, plus it makes it easier to unplug the ribbon cable. Then carefully lift it out and rebuild. Hope this helps. GD --- In vintagesynthrepair@yahoogroups.com, "Miguel Mendoza" <miguel@...> wrote: > > Thanks a lot for your words Martin, In more in the mood of doing it after reading your message ;-) > > Still afraid of the dissasembling process, any help about this anybody else? > > Cheers! > > Miguel. > > > ----- Original Message ----- > From: martinreuter > To: vintagesynthrepair@yahoogroups.com > Sent: Wednesday, February 11, 2009 9:19 PM > Subject: [vintagesynthrepair] Re: Prophet 10 keyboard > > > Hi Miguel, > i restored my Minimoog Keyboard with the set from Virtual-Music - it is really fantastic!! > It feels now like playing a brand new organ, you can play it fast like the wind and it is very > quiet while playing - no clicks or so. Last week i got a NOS Minimoog Keyboard - i was the > first man who touched it with his fingers - and it´s not half so good. > Installing ist not difficult, you need a secound-glew (quick- glew or so, i don´t know the > english word for a very fast drying glew) and a quiet afternoon. Restoring the minis keys > took about 3 hours. I was very impressed about this cheap, easy and wonderful solution! > The original rubber-bushings would get old very fast and they are not so.....perfect. > You will think that you own a brand new keyboard and it will run better than new - believe > me! > OK, it will be a harder job to restore a complete Proph 10 Keyboard, because you have some > more keys....I would help you, but i am sitting here in germany....;-)
> Best regards > Martin >
2009-02-12 by Miguel Mendoza
----- Original Message -----From: gerryrdahlSent: Thursday, February 12, 2009 6:19 AMSubject: [vintagesynthrepair] Re: Prophet 10 keyboardHi Miguel,
I just finished re-assembly of a Prophet 10 lower keyboard.
I get to do the upper this weekend.
I have not used that kit, but I have the replacement bushings.
The trick is to use the correct lubricant.
I can get the 61 key bushing kits for $25.00
so it is a good price for a new keyboard feel.
I have done Polymoogs and several prophets with these bushings
and had no trouble with them not lasting.
About the Prophet 10 lower keyboard removal...
First remove the metal plate under the upper keyboard.
There are 2 screws on each side.
You will have to remove the sequencer if equipped to get this
metal plate out.
Then there are six, two inch long screws that hold it in.
I did remove the lower plate, just so I could see what was
going on, plus it makes it easier to unplug the ribbon cable.
Then carefully lift it out and rebuild.
Hope this helps.
GD
--- In vintagesynthrepair@yahoogroups.com, "Miguel Mendoza"
wrote:
>
> Thanks a lot for your words Martin, In more in the mood of doing
it after reading your message ;-)
>
> Still afraid of the dissasembling process, any help about this
anybody else?
>
> Cheers!
>
> Miguel.
>
>
> ----- Original Message -----
> From: martinreuter
> To: vintagesynthrepair@yahoogroups.com
> Sent: Wednesday, February 11, 2009 9:19 PM
> Subject: [vintagesynthrepair] Re: Prophet 10 keyboard
>
>
> Hi Miguel,
> i restored my Minimoog Keyboard with the set from Virtual-Music -
it is really fantastic!!
> It feels now like playing a brand new organ, you can play it
fast like the wind and it is very
> quiet while playing - no clicks or so. Last week i got a NOS
Minimoog Keyboard - i was the
> first man who touched it with his fingers - and it´s not half so
good.
> Installing ist not difficult, you need a secound-glew (quick-
glew or so, i don´t know the
> english word for a very fast drying glew) and a quiet afternoon.
Restoring the minis keys
>; took about 3 hours. I was very impressed about this cheap, easy
and wonderful solution!
> The original rubber-bushings would get old very fast and they
are not so.....perfect.
> You will think that you own a brand new keyboard and it will run
better than new - believe
> me!
> OK, it will be a harder job to restore a complete Proph 10
Keyboard, because you have some
> more keys....I would help you, but i am sitting here in
germany....;-)
> Best regards
> Martin
>