Yamaha CS80

> Hi all.
>
> We've had a mini membership surge from my posting an the AH mailing list. Welcome all!
>
> Please introduce yourselves and let us know why you're here. The group has been talking about lots of different things lately from debugging ill CS80s to folks with albums of their own music featuring the CS80 (and it's relatives).
>
> Please check out the old messages and files and links (probably way out of date). Now I need to go work on fixing up the CS80 sitting in my dining room that I've been too busy to work on lately. Its owner has been most patient, but I'd like to get it back to him soon.
>
> If I could only do CS80 repairs and restorations for a living! Unfortunately, I think the CS80 world can only support one person and Kent's already claimed it :)
>
> David
>
>

> C
>
> Please forgive me being cheeky but is this the CS80 that was sold on eBay
> Italy recently?
>
> Cari saluti,
>
> Stephen.
>
> ----- Original Message -----
> From: Fernando Zarone <fernandozarone@...>
> To: <yamahacs80@yahoogroups.com>
> Sent: Sunday, February 13, 2011 9:01 AM
> Subject: Re: [yamahacs80] Welcome new (and returning) members!
>
> > Hello all,
> > I have been a AH member since 1995 (now I am 52...), owner of a
> collection of analogue synths (Moog modulars,, Roland sys 700, EMSs, Korg
> PS3200, Elka Synthex, and many others). My job does not leave too much free
> time to me (I am a professor in Dentistry at the university of Napoli -
> Italy), but this is a great passion and when I bought a nice CS 80 from my
> friend Tommaso Rivieccio I immediately fell in love with such a wonderful
> synth. I think that for people like me sharing such a passion, lists like
> CS-80 and analogue heaven are a precious source of info, support and new
> friends; people like David devoting their effort in helping us maintain our
> beasts and in enhancing the quality of old machine with new modifications
> are really worth our gratefulness and appreciation.
> > Unfortunately, the yahoo account becomes full in a brief time, so post can
> bounce back and list cancel members as it should...
> > This is a great list. No timewasters, all of the previous messages are a
> precious source of information.
> >
> > Fernando from Italy
> >
> > BTW next week I am going to Chicago, any CS80 for sale there? :-)
> >
> >
> >
> >
> >
> >
> > Il giorno 13/feb/2011, alle ore 02.14, David ha scritto:
> >
> > > Hi all.
> > >
> > > We've had a mini membership surge from my posting an the AH mailing
> list. Welcome all!
> > >
> > > Please introduce yourselves and let us know why you're here. The group
> has been talking about lots of different things lately from debugging ill
> CS80s to folks with albums of their own music featuring the CS80 (and it's
> relatives).
> > >
> > > Please check out the old messages and files and links (probably way out
> of date). Now I need to go work on fixing up the CS80 sitting in my dining
> room that I've been too busy to work on lately. Its owner has been most
> patient, but I'd like to get it back to him soon.
> > >
> > > If I could only do CS80 repairs and restorations for a living!
> Unfortunately, I think the CS80 world can only support one person and Kent's
> already claimed it :)
> > >
> > > David
> > >
> > >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
> >
> >
> > ------------------------------------
> >
> > Yahoo! Groups Links
> >
> >
> >
>
>
>
> iao Fernando!
>

> Da: Fernando Zarone <fernandozarone@...>
> Data: 13 febbraio 2011 12.58.44 GMT+01.00
> A: yamahacs80@yahoogroups.com
> Oggetto: Re: [yamahacs80] CS80 voice problem
>
> I am getting crazy.
> Summary:
> Voice n.1 (board 21) has a problem. This should be not in the board itself, because it doesn't play ONLY when one of the CHII PRESETS (from Strings to Funky) are selected! When in MEMORY or PANEL it works. So, the problem should be somewhere interrupting the flow to M21 but from a common origin, common to all of the presets...
>
> Any further idea?
>
>
>
>
> Il giorno 12/feb/2011, alle ore 22.05, David Rogoff ha scritto:
>
>> > Fernando Zarone <mailto:fernandozarone@...>
>> > February 12, 2011 11:22 AM
>> >
>> >
>> > Hello all.
>> > After switching the machine on, here is the problem:
>> > MIX I : everything works fine. I move the "channel" selector down to
>> > Mix II
>> > MIX II: panel and memory do work as well. Only the Preset buttons show
>> > the following fault:
>> > when I play the first note it does not work (sometimes it seems to
>> > fire a note, but at a very low level... ), the following 6 in a row do
>> > work. then the following does not work, and so on. 1 yes 6 no.
>> > Moreover, when I keep the first (faulty) key down, and play another
>> > key in a repeated sequential way, all of the notes are normally heard.
>> > I tried to move and check the boards' cables, no clue. The fact that
>> > all of the voices work when panel or memory 2-4 are switched on means
>> > that the voice board of the first note (21)
>> > is not faulty. Do I have to check at T54 or BA?
>>
>> Hi Fernando.
>>
>> It certainly seems like a problem with the first voice card for channel
>> II (M21). It's weird that it's OK from panel and not presets. Here's a
>> couple of ideas to narrow it down:
>> On the panel, turn off VCF level and put Sine level at maximum. Verify
>> all voices work ok.
>> Now turn down Sine and turn up VCF. Turn on pulse wave but turn off
>> sawtooth. Verify all voices.
>> Finally, turn off pulse and turn on sawtooth and repeat.
>> Let us know if that shows anything interesting.
>>
>> David
>>
>> [Non-text portions of this message have been removed]
>>
>>
>>
>

> Check all the wires on R52
>
> -----Original Message-----
> From: Fernando Zarone
> Sent: Sunday, February 13, 2011 2:26 PM
> To: yamahacs80@yahoogroups.com
> Subject: [yamahacs80] UPDATE!!! CS80 voice problem
>
> Now the situation is worse (did I make a mistake or didn't I noticed it
> before?):
>
> All of the last 5 presets of CH II : harpsichord 2, 0rgan 2 up to funky 4
> have a Looooooong sustain, I guess the maximum amount. memory 2 and 4 and
> panel work.
>
> Inizio messaggio inoltrato:
>
> > Da: Fernando Zarone <fernandozarone@...>
> > Data: 13 febbraio 2011 12.58.44 GMT+01.00
> > A: yamahacs80@yahoogroups.com
> > Oggetto: Re: [yamahacs80] CS80 voice problem
> >
> > I am getting crazy.
> > Summary:
> > Voice n.1 (board 21) has a problem. This should be not in the board
> > itself, because it doesn't play ONLY when one of the CHII PRESETS (from
> > Strings to Funky) are selected! When in MEMORY or PANEL it works. So, the
> > problem should be somewhere interrupting the flow to M21 but from a common
> > origin, common to all of the presets...
> >
> > Any further idea?
> >
> >
> >
> >
> > Il giorno 12/feb/2011, alle ore 22.05, David Rogoff ha scritto:
> >
> >> > Fernando Zarone <mailto:fernandozarone@...>
> >> > February 12, 2011 11:22 AM
> >> >
> >> >
> >> > Hello all.
> >> > After switching the machine on, here is the problem:
> >> > MIX I : everything works fine. I move the "channel" selector down to
> >> > Mix II
> >> > MIX II: panel and memory do work as well. Only the Preset buttons show
> >> > the following fault:
> >> > when I play the first note it does not work (sometimes it seems to
> >> > fire a note, but at a very low level... ), the following 6 in a row do
> >> > work. then the following does not work, and so on. 1 yes 6 no.
> >> > Moreover, when I keep the first (faulty) key down, and play another
> >> > key in a repeated sequential way, all of the notes are normally heard.
> >> > I tried to move and check the boards' cables, no clue. The fact that
> >> > all of the voices work when panel or memory 2-4 are switched on means
> >> > that the voice board of the first note (21)
> >> > is not faulty. Do I have to check at T54 or BA?
> >>
> >> Hi Fernando.
> >>
> >> It certainly seems like a problem with the first voice card for channel
> >> II (M21). It's weird that it's OK from panel and not presets. Here's a
> >> couple of ideas to narrow it down:
> >> On the panel, turn off VCF level and put Sine level at maximum. Verify
> >> all voices work ok.
> >> Now turn down Sine and turn up VCF. Turn on pulse wave but turn off
> >> sawtooth. Verify all voices.
> >> Finally, turn off pulse and turn on sawtooth and repeat.
> >> Let us know if that shows anything interesting.
> >>
> >> David
> >>
> >> [Non-text portions of this message have been removed]
> >>
> >>
> >>
> >
>
> [Non-text portions of this message have been removed]
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>

--- In yamahacs80@yahoogroups.com, Fernando Zarone <fernandozarone@...> wrote:
>
> I wanted to update the CS-80 problem saga:
>
> After carefully checking hundreds of connections, I took the TRIG1 board out of the rack.
> There are some repair signs made by the previous owners: some of the ICs are socketed (mono in line), some soldering ponts were faulty.
>
> Now the sustain problem has been solved, the only fault remaining is the M21 voice that keeps on not working only in the first 11 panel buttons on CH II, while Memory 2 /4 / Panel work fine on all of the 8 voices.
> My question: could this problem be related to the same TRIG 1 (or other) board(s)?
>
> David now I bless you for the precious service manual that I bought some years ago from you!!!
>
> Fernando
>
>
>
>
>
> Il giorno 14/feb/2011, alle ore 02.19, KSR ha scritto:
>
> > Check all the wires on R52
> >
> > -----Original Message-----
> > From: Fernando Zarone
> > Sent: Sunday, February 13, 2011 2:26 PM
> > To: yamahacs80@yahoogroups.com
> > Subject: [yamahacs80] UPDATE!!! CS80 voice problem
> >
> > Now the situation is worse (did I make a mistake or didn't I noticed it
> > before?):
> >
> > All of the last 5 presets of CH II : harpsichord 2, 0rgan 2 up to funky 4
> > have a Looooooong sustain, I guess the maximum amount. memory 2 and 4 and
> > panel work.
> >
> > Inizio messaggio inoltrato:
> >
> > > Da: Fernando Zarone <fernandozarone@...>
> > > Data: 13 febbraio 2011 12.58.44 GMT+01.00
> > > A: yamahacs80@yahoogroups.com
> > > Oggetto: Re: [yamahacs80] CS80 voice problem
> > >
> > > I am getting crazy.
> > > Summary:
> > > Voice n.1 (board 21) has a problem. This should be not in the board
> > > itself, because it doesn't play ONLY when one of the CHII PRESETS (from
> > > Strings to Funky) are selected! When in MEMORY or PANEL it works. So, the
> > > problem should be somewhere interrupting the flow to M21 but from a common
> > > origin, common to all of the presets...
> > >
> > > Any further idea?
> > >
> > >
> > >
> > >
> > > Il giorno 12/feb/2011, alle ore 22.05, David Rogoff ha scritto:
> > >
> > >> > Fernando Zarone <mailto:fernandozarone@...>
> > >> > February 12, 2011 11:22 AM
> > >> >
> > >> >
> > >> > Hello all.
> > >> > After switching the machine on, here is the problem:
> > >> > MIX I : everything works fine. I move the "channel" selector down to
> > >> > Mix II
> > >> > MIX II: panel and memory do work as well. Only the Preset buttons show
> > >> > the following fault:
> > >> > when I play the first note it does not work (sometimes it seems to
> > >> > fire a note, but at a very low level... ), the following 6 in a row do
> > >> > work. then the following does not work, and so on. 1 yes 6 no.
> > >> > Moreover, when I keep the first (faulty) key down, and play another
> > >> > key in a repeated sequential way, all of the notes are normally heard.
> > >> > I tried to move and check the boards' cables, no clue. The fact that
> > >> > all of the voices work when panel or memory 2-4 are switched on means
> > >> > that the voice board of the first note (21)
> > >> > is not faulty. Do I have to check at T54 or BA?
> > >>
> > >> Hi Fernando.
> > >>
> > >> It certainly seems like a problem with the first voice card for channel
> > >> II (M21). It's weird that it's OK from panel and not presets. Here's a
> > >> couple of ideas to narrow it down:
> > >> On the panel, turn off VCF level and put Sine level at maximum. Verify
> > >> all voices work ok.
> > >> Now turn down Sine and turn up VCF. Turn on pulse wave but turn off
> > >> sawtooth. Verify all voices.
> > >> Finally, turn off pulse and turn on sawtooth and repeat.
> > >> Let us know if that shows anything interesting.
> > >>
> > >> David
> > >>
> > >> [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]
>