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Thread
2011-02-28 by Mike
2011-02-28 by David
>That's great! Please post the info on the bulbs including any places that you know carry them.
> I finally cross referenced the preset bulbs to the exact specifications of the originals - same shape, lumens, wire leads, filament type, etc.
2011-03-01 by Matt Thomas
>[Non-text portions of this message have been removed]
>
>
>
>
> I finally cross referenced the preset bulbs to the exact specifications of the
> originals - same shape, lumens, wire leads, filament type, etc. I'm going to
> buy a bunch of them if the samples check out ok that I ordered. Is anybody
> interested in preset bulbs?
>
>
>
>
>
2011-03-01 by Daniel Forró
On 1 Mar 2011, at 4:45 AM, Mike wrote:
> I finally cross referenced the preset bulbs to the exact
> specifications of the originals - same shape, lumens, wire leads,
> filament type, etc. I'm going to buy a bunch of them if the
> samples check out ok that I ordered. Is anybody interested in
> preset bulbs?
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>
2011-03-01 by Fredrik Segerfalk
>[Non-text portions of this message have been removed]
> --- In yamahacs80@yahoogroups.com
> <mailto:yamahacs80%40yahoogroups.com>, "Mike" <mborish_2000@...> wrote:
> >
> > I finally cross referenced the preset bulbs to the exact
> specifications of the originals - same shape, lumens, wire leads,
> filament type, etc.
>
> That's great! Please post the info on the bulbs including any places
> that you know carry them.
>
> Thanks,
>
> David
>
>
2011-03-01 by blchrr@homecall.co.uk
> Yes please! About 10.
>
> --
> Fredrik Segerfalk
> www.analogsweden.com
> www.segerfalk.com
>
>
>
> David skrev 2011-02-28 21:52:
>>
>> --- In yamahacs80@yahoogroups.com
>> <mailto:yamahacs80%40yahoogroups.com>, "Mike" <mborish_2000@...> wrote:
>> >
>> > I finally cross referenced the preset bulbs to the exact
>> specifications of the originals - same shape, lumens, wire leads,
>> filament type, etc.
>>
>> That's great! Please post the info on the bulbs including any places
>> that you know carry them.
>>
>> Thanks,
>>
>> David
>>
>>
>
>
>
>
> [Non-text portions of this message have been removed]
>
2011-03-01 by rj krohn
--- On Tue, 3/1/11, blchrr@... <blchrr@...> wrote:
From: blchrr@... <blchrr@...>
Subject: [yamahacs80] Re: Who needs preset bulbs?
To: yamahacs80@yahoogroups.com
Date: Tuesday, March 1, 2011, 11:06 AM
For me too please, ill take half a dozen depending on price.
> Yes please! About 10.
>
> --
> Fredrik Segerfalk
> www.analogsweden.com
> www.segerfalk.com
>
>
>
> David skrev 2011-02-28 21:52:
>>
>> --- In yamahacs80@yahoogroups.com
>> <mailto:yamahacs80%40yahoogroups.com>, "Mike" <mborish_2000@...> wrote:
>> >
>> > I finally cross referenced the preset bulbs to the exact
>> specifications of the originals - same shape, lumens, wire leads,
>> filament type, etc.
>>
>> That's great! Please post the info on the bulbs including any places
>> that you know carry them.
>>
>> Thanks,
>>
>> David
>>
>>
>
>
>
>
> [Non-text portions of this message have been removed]
>
[Non-text portions of this message have been removed]
2011-03-01 by Mike
--- In yamahacs80@yahoogroups.com, "Mike" <mborish_2000@...> wrote:
>
> I finally cross referenced the preset bulbs to the exact specifications of the originals - same shape, lumens, wire leads, filament type, etc. I'm going to buy a bunch of them if the samples check out ok that I ordered. Is anybody interested in preset bulbs?
>
2011-03-01 by Fredrik Segerfalk
>[Non-text portions of this message have been removed]
> Ok, great! I ordered samples and they should be here by the end of the
> week. I'm going to test for manufacturing quality, pass / fail, Kelvin
> Color Temperature, lumens, and heat dissipation characteristics. The
> manufacturer is claiming that these are 10,000 hour bulbs.
>
> If all goes well, I should be able to sell them for 1 for $5, 3 for
> $10, and 20 plus one extra for $40 United States currency. I'm not an
> expert on international shipping, but I will do my best to get them
> wherever they need to go.
>
> Should I put them on e-bay, PayPal or Google checkout?
>
> -Mike
>
> --- In yamahacs80@yahoogroups.com
> <mailto:yamahacs80%40yahoogroups.com>, "Mike" <mborish_2000@...> wrote:
> >
> > I finally cross referenced the preset bulbs to the exact
> specifications of the originals - same shape, lumens, wire leads,
> filament type, etc. I'm going to buy a bunch of them if the samples
> check out ok that I ordered. Is anybody interested in preset bulbs?
> >
>
>
2011-03-01 by François Globensky
--- In yamahacs80@yahoogroups.com, "Mike" <mborish_2000@...> wrote:
>
> I finally cross referenced the preset bulbs to the exact specifications of the originals - same shape, lumens, wire leads, filament type, etc.
That's great! Please post the info on the bulbs including any places that you know carry them.
Thanks,
David
[Non-text portions of this message have been removed]
2011-03-02 by Fernando Zarone
2011-03-02 by Csaba Zvekan
On Mar 2, 2011, at 9:40 AM, Fernando Zarone wrote:
> A question.
> If something is wrong in the PSU of CS-80, how to check why all of the CC voltages are faulty from the origin? Usually one separates the PSU unit from the machine and checks where it is bad. In the service manual (p. 59 if I don't get wrong) it is alerted not to detach the connectors from the PSU, for the risk of damaging the whole.
> So, how to check the PSU unit?
> Moreover, if both two fuses are ok, is there any other component protecting the system ?
>
> Thanks
> Fernando
>
> [Non-text portions of this message have been removed]
>
>
[Non-text portions of this message have been removed]
2011-03-02 by Quazimodo
--- In yamahacs80@yahoogroups.com, Fernando Zarone <fernandozarone@...> wrote:
>
> A question.
> If something is wrong in the PSU of CS-80, how to check why all of the CC voltages are faulty from the origin? Usually one separates the PSU unit from the machine and checks where it is bad. In the service manual (p. 59 if I don't get wrong) it is alerted not to detach the connectors from the PSU, for the risk of damaging the whole.
> So, how to check the PSU unit?
> Moreover, if both two fuses are ok, is there any other component protecting the system ?
>
> Thanks
> Fernando
>
>
> [Non-text portions of this message have been removed]
>
2011-03-02 by Quazimodo
--- In yamahacs80@yahoogroups.com, Csaba Zvekan <czvekan@...> wrote:
>
> Hi Fernando,
>
> The PSU should and can only be calibrated/troubleshooted under load meaning connected with all other boards. What exactly is your problem ? What voltages do you read ? And compare them with the service manual . If something is off and can not be adjusted we can see further down.
>
> Kind Regards
>
> Csaba
>
>
> On Mar 2, 2011, at 9:40 AM, Fernando Zarone wrote:
>
> > A question.
> > If something is wrong in the PSU of CS-80, how to check why all of the CC voltages are faulty from the origin? Usually one separates the PSU unit from the machine and checks where it is bad. In the service manual (p. 59 if I don't get wrong) it is alerted not to detach the connectors from the PSU, for the risk of damaging the whole.
> > So, how to check the PSU unit?
> > Moreover, if both two fuses are ok, is there any other component protecting the system ?
> >
> > Thanks
> > Fernando
> >
2011-03-02 by Fernando Zarone
> That isn't exactly true I don't think.[Non-text portions of this message have been removed]
>
> In a situation where you have just serviced the PSU - like I have done to both my CS80's, replaced all caps and the IC's etc... you don't really want to be switching on not knowing if there are any over-voltages. So therefore the 'on-the-bench' setting up is vital!
>
> This allows you to check to see the PSU is indeed still functioning - and to set all voltages accurately.
>
> Once happy - then it is time to re-install the PSU, remove those jumpers - and then monitor the voltages with all circuit boards connected (as you say) and again adjust voltages but this time measuring at the points specified in the service manual. ie: not on the PSU itself but a certian key positions that take into account distances from the PSU and also cabling etc.
>
> Please service tech's, do correct me if am wrong here. I am no tech as such, just picked up what I know from either here or other sites I follow.
>
> Cheers,
> TOM
>
> --- In yamahacs80@yahoogroups.com, Csaba Zvekan <czvekan@...> wrote:
> >
> > Hi Fernando,
> >
> > The PSU should and can only be calibrated/troubleshooted under load meaning connected with all other boards. What exactly is your problem ? What voltages do you read ? And compare them with the service manual . If something is off and can not be adjusted we can see further down.
> >
> > Kind Regards
> >
> > Csaba
> >
> >
> > On Mar 2, 2011, at 9:40 AM, Fernando Zarone wrote:
> >
> > > A question.
> > > If something is wrong in the PSU of CS-80, how to check why all of the CC voltages are faulty from the origin? Usually one separates the PSU unit from the machine and checks where it is bad. In the service manual (p. 59 if I don't get wrong) it is alerted not to detach the connectors from the PSU, for the risk of damaging the whole.
> > > So, how to check the PSU unit?
> > > Moreover, if both two fuses are ok, is there any other component protecting the system ?
> > >
> > > Thanks
> > > Fernando
> > >
>
>
2011-03-03 by Quazimodo
--- In yamahacs80@yahoogroups.com, Fernando Zarone <fernandozarone@...> wrote:
>
> Explain the problem:
>
> After a long trip with a horrible jet lag I decided to replace the el. capacitors in the last boards. Big mistake. I did not noticed that in the OE2 (chorus etc) a droplet of soldering material had made a short-circuit between two terminals of IC9, pins 5 and 6. At least I guess that was the reason why, later, the machine didn't work anymore but its power light!
>
> The PSU doesn't give any of the + - 15 and 10,5 voltages, while both the accessory ones (8,5 -6,5) are present.
> After bridging the voltages as suggested in the manual p.59 and by some of you, friends, I replaced the 4558s and tested the transistors on the Board. In particular, I found the following transistors, some had been replaced (but the machine used to work great):
> R703 = 2SA424
> TR704 = CBC639
> TR705 = 2SD234
> TR706 = 2SA561
> All of them are OK with the EBC test (DVM)
>
> At the P1 and P2 terminals, + - 28 are present (think it's ok)
>
> I did not check the four large metallic transistors, connected to the heat sinkers, , in that I would not desolder the robust cables. Is it worth measuring tensions on their pin? How much would they be?
>
> Any clue ? Your suggestions are highly appreciated. BTW, no puff, bang, burning plastic smell, burned fuses...
> Fernando
>
>
>
>
>
> Il giorno 02/mar/2011, alle ore 22.02, Quazimodo ha scritto:
>
> > That isn't exactly true I don't think.
> >
> > In a situation where you have just serviced the PSU - like I have done to both my CS80's, replaced all caps and the IC's etc... you don't really want to be switching on not knowing if there are any over-voltages. So therefore the 'on-the-bench' setting up is vital!
> >
> > This allows you to check to see the PSU is indeed still functioning - and to set all voltages accurately.
> >
> > Once happy - then it is time to re-install the PSU, remove those jumpers - and then monitor the voltages with all circuit boards connected (as you say) and again adjust voltages but this time measuring at the points specified in the service manual. ie: not on the PSU itself but a certian key positions that take into account distances from the PSU and also cabling etc.
> >
> > Please service tech's, do correct me if am wrong here. I am no tech as such, just picked up what I know from either here or other sites I follow.
> >
> > Cheers,
> > TOM
> >
> > --- In yamahacs80@yahoogroups.com, Csaba Zvekan <czvekan@> wrote:
> > >
> > > Hi Fernando,
> > >
> > > The PSU should and can only be calibrated/troubleshooted under load meaning connected with all other boards. What exactly is your problem ? What voltages do you read ? And compare them with the service manual . If something is off and can not be adjusted we can see further down.
> > >
> > > Kind Regards
> > >
> > > Csaba
> > >
> > >
> > > On Mar 2, 2011, at 9:40 AM, Fernando Zarone wrote:
> > >
> > > > A question.
> > > > If something is wrong in the PSU of CS-80, how to check why all of the CC voltages are faulty from the origin? Usually one separates the PSU unit from the machine and checks where it is bad. In the service manual (p. 59 if I don't get wrong) it is alerted not to detach the connectors from the PSU, for the risk of damaging the whole.
> > > > So, how to check the PSU unit?
> > > > Moreover, if both two fuses are ok, is there any other component protecting the system ?
> > > >
> > > > Thanks
> > > > Fernando
> > > >
> >
> >
>
>
>
> [Non-text portions of this message have been removed]
>
2011-03-03 by Fernando Zarone
> Fernando, I cannot comment really on your fault or symptoms, I'll leave that to the tech's... David, Scott, Kent...? But I do however think that this would be a classic case of removing the PSU, jumpering those points mentioned earlier and working on the PSU.[Non-text portions of this message have been removed]
>
> Do not replace until you have all the right voltages in the right places - all set and calibrated and ready to replace..!!
>
> Cheers,
> TOM
>
> --- In yamahacs80@yahoogroups.com, Fernando Zarone <fernandozarone@...> wrote:
> >
> > Explain the problem:
> >
> > After a long trip with a horrible jet lag I decided to replace the el. capacitors in the last boards. Big mistake. I did not noticed that in the OE2 (chorus etc) a droplet of soldering material had made a short-circuit between two terminals of IC9, pins 5 and 6. At least I guess that was the reason why, later, the machine didn't work anymore but its power light!
> >
> > The PSU doesn't give any of the + - 15 and 10,5 voltages, while both the accessory ones (8,5 -6,5) are present.
> > After bridging the voltages as suggested in the manual p.59 and by some of you, friends, I replaced the 4558s and tested the transistors on the Board. In particular, I found the following transistors, some had been replaced (but the machine used to work great):
> > R703 = 2SA424
> > TR704 = CBC639
> > TR705 = 2SD234
> > TR706 = 2SA561
> > All of them are OK with the EBC test (DVM)
> >
> > At the P1 and P2 terminals, + - 28 are present (think it's ok)
> >
> > I did not check the four large metallic transistors, connected to the heat sinkers, , in that I would not desolder the robust cables. Is it worth measuring tensions on their pin? How much would they be?
> >
> > Any clue ? Your suggestions are highly appreciated. BTW, no puff, bang, burning plastic smell, burned fuses...
> > Fernando
> >
> >
> >
> >
> >
> > Il giorno 02/mar/2011, alle ore 22.02, Quazimodo ha scritto:
> >
> > > That isn't exactly true I don't think.
> > >
> > > In a situation where you have just serviced the PSU - like I have done to both my CS80's, replaced all caps and the IC's etc... you don't really want to be switching on not knowing if there are any over-voltages. So therefore the 'on-the-bench' setting up is vital!
> > >
> > > This allows you to check to see the PSU is indeed still functioning - and to set all voltages accurately.
> > >
> > > Once happy - then it is time to re-install the PSU, remove those jumpers - and then monitor the voltages with all circuit boards connected (as you say) and again adjust voltages but this time measuring at the points specified in the service manual. ie: not on the PSU itself but a certian key positions that take into account distances from the PSU and also cabling etc.
> > >
> > > Please service tech's, do correct me if am wrong here. I am no tech as such, just picked up what I know from either here or other sites I follow.
> > >
> > > Cheers,
> > > TOM
> > >
> > > --- In yamahacs80@yahoogroups.com, Csaba Zvekan <czvekan@> wrote:
> > > >
> > > > Hi Fernando,
> > > >
> > > > The PSU should and can only be calibrated/troubleshooted under load meaning connected with all other boards. What exactly is your problem ? What voltages do you read ? And compare them with the service manual . If something is off and can not be adjusted we can see further down.
> > > >
> > > > Kind Regards
> > > >
> > > > Csaba
> > > >
> > > >
> > > > On Mar 2, 2011, at 9:40 AM, Fernando Zarone wrote:
> > > >
> > > > > A question.
> > > > > If something is wrong in the PSU of CS-80, how to check why all of the CC voltages are faulty from the origin? Usually one separates the PSU unit from the machine and checks where it is bad. In the service manual (p. 59 if I don't get wrong) it is alerted not to detach the connectors from the PSU, for the risk of damaging the whole.
> > > > > So, how to check the PSU unit?
> > > > > Moreover, if both two fuses are ok, is there any other component protecting the system ?
> > > > >
> > > > > Thanks
> > > > > Fernando
> > > > >
> > >
> > >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
>
2011-03-06 by Fernando Zarone
2011-03-09 by Fernando Zarone
2011-03-23 by system_700
--- In yamahacs80@yahoogroups.com, "Mike" <mborish_2000@...> wrote:
>
> I finally cross referenced the preset bulbs to the exact specifications of the originals - same shape, lumens, wire leads, filament type, etc. I'm going to buy a bunch of them if the samples check out ok that I ordered. Is anybody interested in preset bulbs?
>
2011-03-23 by Andrew Kirkby
On 24/03/2011, at 4:30 AM, "system_700" <isatellite@...> wrote:
> I'd be interested in a set of 21.
>
> --- In yamahacs80@yahoogroups.com, "Mike" <mborish_2000@...> wrote:
> >
> > I finally cross referenced the preset bulbs to the exact specifications of the originals - same shape, lumens, wire leads, filament type, etc. I'm going to buy a bunch of them if the samples check out ok that I ordered. Is anybody interested in preset bulbs?
> >
>
>
[Non-text portions of this message have been removed]
2011-03-23 by flugel66
--- In yamahacs80@yahoogroups.com, "Mike" <mborish_2000@...> wrote:
>
> I finally cross referenced the preset bulbs to the exact specifications of the originals - same shape, lumens, wire leads, filament type, etc. I'm going to buy a bunch of them if the samples check out ok that I ordered. Is anybody interested in preset bulbs?
>
2011-03-24 by Fernando Zarone
> I could use about 20...Thanks![Non-text portions of this message have been removed]
>
> --- In yamahacs80@yahoogroups.com, "Mike" <mborish_2000@...> wrote:
> >
> > I finally cross referenced the preset bulbs to the exact specifications of the originals - same shape, lumens, wire leads, filament type, etc. I'm going to buy a bunch of them if the samples check out ok that I ordered. Is anybody interested in preset bulbs?
> >
>
>
2011-03-24 by rj krohn
2011-03-24 by nigelcee@rocketmail.com
--- In yamahacs80@yahoogroups.com, rj krohn <r_j_d_2.phila@...> wrote:
>
> i'd go for 5-10 or so. thanks.
>
>
>
>
> [Non-text portions of this message have been removed]
>
2011-03-24 by Mike
--- In yamahacs80@yahoogroups.com, "Mike" <mborish_2000@...> wrote:
>
> I finally cross referenced the preset bulbs to the exact specifications of the originals - same shape, lumens, wire leads, filament type, etc. I'm going to buy a bunch of them if the samples check out ok that I ordered. Is anybody interested in preset bulbs?
>
2011-03-25 by Quazimodo
--- In yamahacs80@yahoogroups.com, "Mike" <mborish_2000@...> wrote:
>
> Ok, So I got the first models in and they are close but not quite the same, I think. There is a voltage drop of about 100mv more than the originals and they are slightly brighter and whiter - this is very subtle. They also run a tiny bit hotter. It could be that the ones in my CS-80 are old and don't have the output that they had when they were new. I have tested the new ones extensively and they seem OK. The IG00157 doesn't get hot either.
>
> Does anybody know anything about the IG00157? What are the specs? If the specs confirm that these bulbs are OK, then we are good to go and I can order a couple thousand.
>
> Also, before I make a move, there is another bulb model that I want to check out first because it could be a better fit; it draws a third less current and has a third less lumens. Unfortunately, I might need to order 10,000 of them and wait 3 months. Ha Ha
>
> Any comments or suggestions will be appreciated.
>
> -Mike
>
> --- In yamahacs80@yahoogroups.com, "Mike" <mborish_2000@> wrote:
> >
> > I finally cross referenced the preset bulbs to the exact specifications of the originals - same shape, lumens, wire leads, filament type, etc. I'm going to buy a bunch of them if the samples check out ok that I ordered. Is anybody interested in preset bulbs?
> >
>
2011-03-31 by Fernando Zarone
2011-03-31 by Andrew Kirkby
On 01/04/2011, at 8:31 AM, Fernando Zarone wrote:
> Hello,
> my CS-80 has the following defect:
> the notes C# D D# and G G# A do not respond to AT, in all of the
> octaves. All the others do.
> Thinking this to be a problem of TKC, I replaced all of the
> (socketed) ICs, resoldered all of the wires, but nothing.
> The problem is shown in both CH I and II presets.
>
> Could somebody help me, please? Does the AT of these two groups of
> adjacent keys correspond to specific component(s) / boards?
>
> I did not check the TSBs. Could they be involved?
>
> Every help is very welcome.
>
> Ciao a tutti
>
> Fernando
>
> [Non-text portions of this message have been removed]
>
>
>
Andrew Kirkby
(e) kirkbyte@...
(m) 0416 000 070
[Non-text portions of this message have been removed]
2011-03-31 by David Rogoff
On Mar 31, 2011, at 2:45 PM, Andrew Kirkby <kirkbyte@...> wrote:
> Hi Fernando,
>
> It is likely to be the TSB boards. When you press a key the signal
> from the FSR on the key is buffered by the TSB circuit. I'd say that
> some of the 4051 on TSB boards are not working properly and not
> outputting the signal to the multiplexing circuits on the TKC.
>
> It would be wise to completely overhaul the TSB boards, replacing all
> capacitors and CMOS with newer ones. I use Panasonic FC electrolytics,
> WIMA polypropylene and TI CMOS with Mil-Max gold sockets. If you need
> the digikey PN#s send me an email and i'll mail you a spreadsheet.
>
> AK
> On 01/04/2011, at 8:31 AM, Fernando Zarone wrote:
>
>> Hello,
>> my CS-80 has the following defect:
>> the notes C# D D# and G G# A do not respond to AT, in all of the
>> octaves. All the others do.
>> Thinking this to be a problem of TKC, I replaced all of the
>> (socketed) ICs, resoldered all of the wires, but nothing.
>> The problem is shown in both CH I and II presets.
>>
>> Could somebody help me, please? Does the AT of these two groups of
>> adjacent keys correspond to specific component(s) / boards?
>>
>> I did not check the TSBs. Could they be involved?
>>
>> Every help is very welcome.
>>
>> Ciao a tutti
>>
>> Fernando
>>
>> [Non-text portions of this message have been removed]
>>
>>
>>
>
> Andrew Kirkby
> (e) kirkbyte@...
> (m) 0416 000 070
>
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>
2011-03-31 by Andrew Kirkby
On 01/04/2011, at 9:12 AM, David Rogoff wrote:
> Fernando,
>
> Please put your parts spreadsheet in the files section of the site.
> I'm planning on making a full table of all the usual parts that need
> replacing with current equivalents and commons (e.g. Digikey)
> supplier part numbers.
>
> Mike, could you please post the part numbers and source for the
> lamps you found to add to this list?
>
> Also, I'm sure Fernando is right about the TSBs needing redoing, but
> the bad notes repeating looks like a problem with the 4051 enable
> pins, which come from the TKC. The cs80 I'm working on had this
> issue which turned out to be wires broken off on the TKC and TSBs.
>
> David
>
> Sent from my iPad
>
> On Mar 31, 2011, at 2:45 PM, Andrew Kirkby
> <kirkbyte@...> wrote:
>
> > Hi Fernando,
> >
> > It is likely to be the TSB boards. When you press a key the signal
> > from the FSR on the key is buffered by the TSB circuit. I'd say that
> > some of the 4051 on TSB boards are not working properly and not
> > outputting the signal to the multiplexing circuits on the TKC.
> >
> > It would be wise to completely overhaul the TSB boards, replacing
> all
> > capacitors and CMOS with newer ones. I use Panasonic FC
> electrolytics,
> > WIMA polypropylene and TI CMOS with Mil-Max gold sockets. If you
> need
> > the digikey PN#s send me an email and i'll mail you a spreadsheet.
> >
> > AK
> > On 01/04/2011, at 8:31 AM, Fernando Zarone wrote:
> >
> >> Hello,
> >> my CS-80 has the following defect:
> >> the notes C# D D# and G G# A do not respond to AT, in all of the
> >> octaves. All the others do.
> >> Thinking this to be a problem of TKC, I replaced all of the
> >> (socketed) ICs, resoldered all of the wires, but nothing.
> >> The problem is shown in both CH I and II presets.
> >>
> >> Could somebody help me, please? Does the AT of these two groups of
> >> adjacent keys correspond to specific component(s) / boards?
> >>
> >> I did not check the TSBs. Could they be involved?
> >>
> >> Every help is very welcome.
> >>
> >> Ciao a tutti
> >>
> >> Fernando
> >>
> >> [Non-text portions of this message have been removed]
> >>
> >>
> >>
> >
> > Andrew Kirkby
> > (e) kirkbyte@...
> > (m) 0416 000 070
> >
> >
> >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
> >
> >
> > ------------------------------------
> >
> > Yahoo! Groups Links
> >
> >
> >
>
>
Andrew Kirkby
(e) kirkbyte@...
(m) 0416 000 070
[Non-text portions of this message have been removed]
2011-03-31 by Quazimodo
--- In yamahacs80@yahoogroups.com, David Rogoff <david@...> wrote:
>
The cs80 I'm working on had this issue which turned out to be wires broken off on the TKC and TSBs.
>
> David
>
2011-04-01 by Mike
--- In yamahacs80@yahoogroups.com, David Rogoff <david@...> wrote:
>
> Fernando,
>
> Please put your parts spreadsheet in the files section of the site. I'm planning on making a full table of all the usual parts that need replacing with current equivalents and commons (e.g. Digikey) supplier part numbers.
>
> Mike, could you please post the part numbers and source for the lamps you found to add to this list?
>
> Also, I'm sure Fernando is right about the TSBs needing redoing, but the bad notes repeating looks like a problem with the 4051 enable pins, which come from the TKC. The cs80 I'm working on had this issue which turned out to be wires broken off on the TKC and TSBs.
>
> David
>
> Sent from my iPad
>
> On Mar 31, 2011, at 2:45 PM, Andrew Kirkby <kirkbyte@...> wrote:
>
> > Hi Fernando,
> >
> > It is likely to be the TSB boards. When you press a key the signal
> > from the FSR on the key is buffered by the TSB circuit. I'd say that
> > some of the 4051 on TSB boards are not working properly and not
> > outputting the signal to the multiplexing circuits on the TKC.
> >
> > It would be wise to completely overhaul the TSB boards, replacing all
> > capacitors and CMOS with newer ones. I use Panasonic FC electrolytics,
> > WIMA polypropylene and TI CMOS with Mil-Max gold sockets. If you need
> > the digikey PN#s send me an email and i'll mail you a spreadsheet.
> >
> > AK
> > On 01/04/2011, at 8:31 AM, Fernando Zarone wrote:
> >
> >> Hello,
> >> my CS-80 has the following defect:
> >> the notes C# D D# and G G# A do not respond to AT, in all of the
> >> octaves. All the others do.
> >> Thinking this to be a problem of TKC, I replaced all of the
> >> (socketed) ICs, resoldered all of the wires, but nothing.
> >> The problem is shown in both CH I and II presets.
> >>
> >> Could somebody help me, please? Does the AT of these two groups of
> >> adjacent keys correspond to specific component(s) / boards?
> >>
> >> I did not check the TSBs. Could they be involved?
> >>
> >> Every help is very welcome.
> >>
> >> Ciao a tutti
> >>
> >> Fernando
> >>
> >> [Non-text portions of this message have been removed]
> >>
> >>
> >>
> >
> > Andrew Kirkby
> > (e) kirkbyte@...
> > (m) 0416 000 070
> >
> >
> >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
> >
> >
> > ------------------------------------
> >
> > Yahoo! Groups Links
> >
> >
> >
>