Yamaha CS80

Hi all
I'm writing on behalf of Fernando who's got another problem with his machine which was eventually about to be fully restored.
While removing one board in the voices' rig, one of the fuses suddendly blew up and the main voltage jumped to +20V. After he restored the correct voltage he experienced all kinds of weird sounds coming off the CS-80.
I only hope that the KAS didn't break up, so please can you give me any advice or diagnosis about this problem.
please help
M

Sounds like some CMOS shorted out. Which fuse blew?

Sent from my iPhone

On 04/04/2011, at 12:27 AM, "max fazio" <faxiomas@...> wrote:

> Hi all
> I'm writing on behalf of Fernando who's got another problem with his machine which was eventually about to be fully restored.
> While removing one board in the voices' rig, one of the fuses suddendly blew up and the main voltage jumped to +20V. After he restored the correct voltage he experienced all kinds of weird sounds coming off the CS-80.
> I only hope that the KAS didn't break up, so please can you give me any advice or diagnosis about this problem.
> please help
> M
>
>


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

Hi Andy
I really hope it's just like what you said
Fernando did align all of the KAS' trimpots going from K1 to K8 @125mV; now it happens that the trimpots turned to a wrong 144mV after the shock; besides that, the SH trimpots decalibrated strongly, as well; now they bring:

K1,K2,K5,K6= +3V
K3,K4,K7,K8= -0.20V

I may also agree that some CMOS fried up while getting the shock, but what about the KAS?
I'll let you know about the fuse
Please give any advice...
I'm scared a whole lot!!!
M

--- In yamahacs80@yahoogroups.com, Andrew Kirkby <kirkbyte@...> wrote:
>
> Sounds like some CMOS shorted out. Which fuse blew?
>
> Sent from my iPhone
>
> On 04/04/2011, at 12:27 AM, "max fazio" <faxiomas@...> wrote:
>
> > Hi all
> > I'm writing on behalf of Fernando who's got another problem with his machine which was eventually about to be fully restored.
> > While removing one board in the voices' rig, one of the fuses suddendly blew up and the main voltage jumped to +20V. After he restored the correct voltage he experienced all kinds of weird sounds coming off the CS-80.
> > I only hope that the KAS didn't break up, so please can you give me any advice or diagnosis about this problem.
> > please help
> > M
> >
> >
>
>
> [Non-text portions of this message have been removed]
>

Hi

Sounds like some CMOS shorted out. Which fuse blew?

Apparently the one on the left if you look from a higher pov with the keyboard in front of you
Update: now tensions are regular, those with scary settings are the ones between KAS and SH
M

----- Original Message -----
From: Andrew Kirkby
To: yamahacs80@yahoogroups.com
Sent: Sunday, April 03, 2011 4:32 PM
Subject: Re: [yamahacs80] Help! Note mess!



Sounds like some CMOS shorted out. Which fuse blew?

Sent from my iPhone

On 04/04/2011, at 12:27 AM, "max fazio" <faxiomas@...> wrote:

> Hi all
> I'm writing on behalf of Fernando who's got another problem with his machine which was eventually about to be fully restored.
> While removing one board in the voices' rig, one of the fuses suddendly blew up and the main voltage jumped to +20V. After he restored the correct voltage he experienced all kinds of weird sounds coming off the CS-80.
> I only hope that the KAS didn't break up, so please can you give me any advice or diagnosis about this problem.
> please help
> M
>
>

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





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

Hi all
Happily we solved the problem: 2 4016 CMOS brought their soul back to the Almighty but , at least, no other problem was found; can anybody tell me about how to modify the tracks in order to be able to put more fuses?
Thx

--- In yamahacs80@yahoogroups.com, "Max Fazio" <faxiomas@...> wrote:
>
> Hi
>
> Sounds like some CMOS shorted out. Which fuse blew?
>
> Apparently the one on the left if you look from a higher pov with the keyboard in front of you
> Update: now tensions are regular, those with scary settings are the ones between KAS and SH
> M
>
>
> ----- Original Message -----
> From: Andrew Kirkby
> To: yamahacs80@yahoogroups.com
> Sent: Sunday, April 03, 2011 4:32 PM
> Subject: Re: [yamahacs80] Help! Note mess!
>
>
>
> Sounds like some CMOS shorted out. Which fuse blew?
>
> Sent from my iPhone
>
> On 04/04/2011, at 12:27 AM, "max fazio" <faxiomas@...> wrote:
>
> > Hi all
> > I'm writing on behalf of Fernando who's got another problem with his machine which was eventually about to be fully restored.
> > While removing one board in the voices' rig, one of the fuses suddendly blew up and the main voltage jumped to +20V. After he restored the correct voltage he experienced all kinds of weird sounds coming off the CS-80.
> > I only hope that the KAS didn't break up, so please can you give me any advice or diagnosis about this problem.
> > please help
> > M
> >
> >
>
> [Non-text portions of this message have been removed]
>
>
>
>
>
> [Non-text portions of this message have been removed]
>

Hi Max,

That is good news. Just as i had suspected...

Where do you want to put more fuses?

Andrew

> max fazio <faxiomas@...> wrote:
>
> Hi all
> Happily we solved the problem: 2 4016 CMOS brought their soul back to
> the Almighty but , at least, no other problem was found; can anybody
> tell me about how to modify the tracks in order to be able to put more
> fuses?
> Thx
> --- In yamahacs80@yahoogroups.com, "Max Fazio" <faxiomas@...> wrote:
> >
> > Hi
> >
> > Sounds like some CMOS shorted out. Which fuse blew?
> >
> > Apparently the one on the left if you look from a higher pov with the
> keyboard in front of you
> > Update: now tensions are regular, those with scary settings are the
> ones between KAS and SH
> > M
> >
> >
> > ----- Original Message -----
> > From: Andrew Kirkby
> > To: yamahacs80@yahoogroups.com
> > Sent: Sunday, April 03, 2011 4:32 PM
> > Subject: Re: [yamahacs80] Help! Note mess!
> >
> >
> >
> > Sounds like some CMOS shorted out. Which fuse blew?
> >
> > Sent from my iPhone
> >
> > On 04/04/2011, at 12:27 AM, "max fazio" <faxiomas@...> wrote:
> >
> > > Hi all
> > > I'm writing on behalf of Fernando who's got another problem with
> his machine which was eventually about to be fully restored.
> > > While removing one board in the voices' rig, one of the fuses
> suddendly blew up and the main voltage jumped to +20V. After he restored
> the correct voltage he experienced all kinds of weird sounds coming off
> the CS-80.
> > > I only hope that the KAS didn't break up, so please can you give
> me any advice or diagnosis about this problem.
> > > please help
> > > M
> > >
> > >
> >
> > [Non-text portions of this message have been removed]
> >
> >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >

Hi Andy
I've read somewhere about a custom project which enabled to isolate the most critical points (KAS, SH, TKC) from occasional shocks and PSU failures; anyway it looks pretty foggy to me, as I've read about it many years ago and lose the documentation! Did you have some more infos?
Thx
M

--- In yamahacs80@yahoogroups.com, kirkbyte@... wrote:
>
> Hi Max,
>
> That is good news. Just as i had suspected...
>
> Where do you want to put more fuses?
>
> Andrew
>
>
>
> > max fazio <faxiomas@...> wrote:
> >
> > Hi all
> > Happily we solved the problem: 2 4016 CMOS brought their soul back to
> > the Almighty but , at least, no other problem was found; can anybody
> > tell me about how to modify the tracks in order to be able to put more
> > fuses?
> > Thx
> > --- In yamahacs80@yahoogroups.com, "Max Fazio" <faxiomas@> wrote:
> > >
> > > Hi
> > >
> > > Sounds like some CMOS shorted out. Which fuse blew?
> > >
> > > Apparently the one on the left if you look from a higher pov with the
> > keyboard in front of you
> > > Update: now tensions are regular, those with scary settings are the
> > ones between KAS and SH
> > > M
> > >
> > >
> > > ----- Original Message -----
> > > From: Andrew Kirkby
> > > To: yamahacs80@yahoogroups.com
> > > Sent: Sunday, April 03, 2011 4:32 PM
> > > Subject: Re: [yamahacs80] Help! Note mess!
> > >
> > >
> > >
> > > Sounds like some CMOS shorted out. Which fuse blew?
> > >
> > > Sent from my iPhone
> > >
> > > On 04/04/2011, at 12:27 AM, "max fazio" <faxiomas@> wrote:
> > >
> > > > Hi all
> > > > I'm writing on behalf of Fernando who's got another problem with
> > his machine which was eventually about to be fully restored.
> > > > While removing one board in the voices' rig, one of the fuses
> > suddendly blew up and the main voltage jumped to +20V. After he restored
> > the correct voltage he experienced all kinds of weird sounds coming off
> > the CS-80.
> > > > I only hope that the KAS didn't break up, so please can you give
> > me any advice or diagnosis about this problem.
> > > > please help
> > > > M
> > > >
> > > >
> > >
> > > [Non-text portions of this message have been removed]
> > >
> > >
> > >
> > >
> > >
> > > [Non-text portions of this message have been removed]
> > >
>

Hi Max,

Personally i'd just add decoupling caps and replace ALL the CMOS in
the unit with new TI stuff. All the old CMOS in the unit will fail -
i'm actually surprised it has lasted this long. CMOS is pretty cheap
though if you are using good quality Mil-Max machined sockets the cost
increases by a rather a large amount :) Also, if you replace all of
the parts in the PSU with new ones you can basically avoid the root
cause of all these issues. I'd also check all of the voltages with a
very high precision multimeter if possible, just to get it spot on.

In any case, you will get a CS80 that will be inherently more reliable
or at least a lot closer to how it was out of the factory.


Andrew

On 05/04/2011, at 4:56 PM, max fazio wrote:

> Hi Andy
> I've read somewhere about a custom project which enabled to isolate
> the most critical points (KAS, SH, TKC) from occasional shocks and
> PSU failures; anyway it looks pretty foggy to me, as I've read about
> it many years ago and lose the documentation! Did you have some more
> infos?
> Thx
> M
> --- In yamahacs80@yahoogroups.com, kirkbyte@... wrote:
> >
> > Hi Max,
> >
> > That is good news. Just as i had suspected...
> >
> > Where do you want to put more fuses?
> >
> > Andrew
> >
> >
> >
> > > max fazio <faxiomas@...> wrote:
> > >
> > > Hi all
> > > Happily we solved the problem: 2 4016 CMOS brought their soul
> back to
> > > the Almighty but , at least, no other problem was found; can
> anybody
> > > tell me about how to modify the tracks in order to be able to
> put more
> > > fuses?
> > > Thx
> > > --- In yamahacs80@yahoogroups.com, "Max Fazio" <faxiomas@> wrote:
> > > >
> > > > Hi
> > > >
> > > > Sounds like some CMOS shorted out. Which fuse blew?
> > > >
> > > > Apparently the one on the left if you look from a higher pov
> with the
> > > keyboard in front of you
> > > > Update: now tensions are regular, those with scary settings
> are the
> > > ones between KAS and SH
> > > > M
> > > >
> > > >
> > > > ----- Original Message -----
> > > > From: Andrew Kirkby
> > > > To: yamahacs80@yahoogroups.com
> > > > Sent: Sunday, April 03, 2011 4:32 PM
> > > > Subject: Re: [yamahacs80] Help! Note mess!
> > > >
> > > >
> > > >
> > > > Sounds like some CMOS shorted out. Which fuse blew?
> > > >
> > > > Sent from my iPhone
> > > >
> > > > On 04/04/2011, at 12:27 AM, "max fazio" <faxiomas@> wrote:
> > > >
> > > > > Hi all
> > > > > I'm writing on behalf of Fernando who's got another problem
> with
> > > his machine which was eventually about to be fully restored.
> > > > > While removing one board in the voices' rig, one of the fuses
> > > suddendly blew up and the main voltage jumped to +20V. After he
> restored
> > > the correct voltage he experienced all kinds of weird sounds
> coming off
> > > the CS-80.
> > > > > I only hope that the KAS didn't break up, so please can you
> give
> > > me any advice or diagnosis about this problem.
> > > > > please help
> > > > > M
> > > > >
> > > > >
> > > >
> > > > [Non-text portions of this message have been removed]
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > [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]

Hi All,
due to the fact that most of the IC sockets had been already soldered in place (correctly, by our friend Tommy from Bologna, previous owner...), is it convenient to avoid replacing them again w/ Mill-Max, both for economic reasons and for not burning the traces, soldering, instead, on the trace side ceramic 0.1 caps?

As to the ICs, are the CD series ones OK (CD4016, CD4069 etc.)?

Last: can the two tantalium blue caps in the KAS (1uF and 22uF) be replaced with two simple electrolytic, more reliable ones?

BTW, I replaced all of the trimpots both in the KAS and SH with 8x2= 16 perfectly fitting 10K multiturn ones. The same done with the BA VR3 100K one (calibrating the 4.00 ref Voltage) = great!




Il giorno 05/apr/2011, alle ore 14.33, Andrew Kirkby ha scritto:

> Hi Max,
>
> Personally i'd just add decoupling caps and replace ALL the CMOS in
> the unit with new TI stuff. All the old CMOS in the unit will fail -
> i'm actually surprised it has lasted this long. CMOS is pretty cheap
> though if you are using good quality Mil-Max machined sockets the cost
> increases by a rather a large amount :) Also, if you replace all of
> the parts in the PSU with new ones you can basically avoid the root
> cause of all these issues. I'd also check all of the voltages with a
> very high precision multimeter if possible, just to get it spot on.
>
> In any case, you will get a CS80 that will be inherently more reliable
> or at least a lot closer to how it was out of the factory.
>
>
> Andrew
>
> On 05/04/2011, at 4:56 PM, max fazio wrote:
>
>> Hi Andy
>> I've read somewhere about a custom project which enabled to isolate
>> the most critical points (KAS, SH, TKC) from occasional shocks and
>> PSU failures; anyway it looks pretty foggy to me, as I've read about
>> it many years ago and lose the documentation! Did you have some more
>> infos?
>> Thx
>> M
>> --- In yamahacs80@yahoogroups.com, kirkbyte@... wrote:
>>>
>>> Hi Max,
>>>
>>> That is good news. Just as i had suspected...
>>>
>>> Where do you want to put more fuses?
>>>
>>> Andrew
>>>
>>>
>>>
>>>> max fazio <faxiomas@...> wrote:
>>>>
>>>> Hi all
>>>> Happily we solved the problem: 2 4016 CMOS brought their soul
>> back to
>>>> the Almighty but , at least, no other problem was found; can
>> anybody
>>>> tell me about how to modify the tracks in order to be able to
>> put more
>>>> fuses?
>>>> Thx
>>>> --- In yamahacs80@yahoogroups.com, "Max Fazio" <faxiomas@> wrote:
>>>>>
>>>>> Hi
>>>>>
>>>>> Sounds like some CMOS shorted out. Which fuse blew?
>>>>>
>>>>> Apparently the one on the left if you look from a higher pov
>> with the
>>>> keyboard in front of you
>>>>> Update: now tensions are regular, those with scary settings
>> are the
>>>> ones between KAS and SH
>>>>> M
>>>>>
>>>>>
>>>>> ----- Original Message -----
>>>>> From: Andrew Kirkby
>>>>> To: yamahacs80@yahoogroups.com
>>>>> Sent: Sunday, April 03, 2011 4:32 PM
>>>>> Subject: Re: [yamahacs80] Help! Note mess!
>>>>>
>>>>>
>>>>>
>>>>> Sounds like some CMOS shorted out. Which fuse blew?
>>>>>
>>>>> Sent from my iPhone
>>>>>
>>>>> On 04/04/2011, at 12:27 AM, "max fazio" <faxiomas@> wrote:
>>>>>
>>>>>> Hi all
>>>>>> I'm writing on behalf of Fernando who's got another problem
>> with
>>>> his machine which was eventually about to be fully restored.
>>>>>> While removing one board in the voices' rig, one of the fuses
>>>> suddendly blew up and the main voltage jumped to +20V. After he
>> restored
>>>> the correct voltage he experienced all kinds of weird sounds
>> coming off
>>>> the CS-80.
>>>>>> I only hope that the KAS didn't break up, so please can you
>> give
>>>> me any advice or diagnosis about this problem.
>>>>>> please help
>>>>>> M
>>>>>>
>>>>>>
>>>>>
>>>>> [Non-text portions of this message have been removed]
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> [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
>
>
>

Sent from my iPad

On Apr 5, 2011, at 10:26 AM, Fernando Zarone <fernandozarone@...> wrote:

> Hi All,
> due to the fact that most of the IC sockets had been already soldered in place (correctly, by our friend Tommy from Bologna, previous owner...), is it convenient to avoid replacing them again w/ Mill-Max, both for economic reasons and for not burning the traces, soldering, instead, on the trace side ceramic 0.1 caps?

Yes - I just ordered some Mill-Max sockets with and without caps. The cap ones are about $3 each compared to less than half that for the regular. When I replaced all the CMOS in my CS80 a few years ago, I used regular sockets and soldered caps to the back. A lot of work! In the future, I'd use the cap sockets, but maybe only every other or 3rd chip.

>
> As to the ICs, are the CD series ones OK (CD4016, CD4069 etc.)?

Yep

>
> Last: can the two tantalium blue caps in the KAS (1uF and 22uF) be replaced with two simple electrolytic, more reliable ones?
>
> BTW, I replaced all of the trimpots both in the KAS and SH with 8x2= 16 perfectly fitting 10K multiturn ones. The same done with the BA VR3 100K one (calibrating the 4.00 ref Voltage) = great!

Great ! Any good replacements for the various M-card trimmers? Obviously, the 4 for tuning, but if I ever do a full 16-card calibration again, I'd want to replace all trimmers since many of them are way to sensitive.

>
>
>
>
> Il giorno 05/apr/2011, alle ore 14.33, Andrew Kirkby ha scritto:
>
>> Hi Max,
>>
>> Personally i'd just add decoupling caps and replace ALL the CMOS in
>> the unit with new TI stuff. All the old CMOS in the unit will fail -
>> i'm actually surprised it has lasted this long. CMOS is pretty cheap
>> though if you are using good quality Mil-Max machined sockets the cost
>> increases by a rather a large amount :) Also, if you replace all of
>> the parts in the PSU with new ones you can basically avoid the root
>> cause of all these issues. I'd also check all of the voltages with a
>> very high precision multimeter if possible, just to get it spot on.
>>
>> In any case, you will get a CS80 that will be inherently more reliable
>> or at least a lot closer to how it was out of the factory.
>>
>>
>> Andrew
>>
>> On 05/04/2011, at 4:56 PM, max fazio wrote:
>>
>>> Hi Andy
>>> I've read somewhere about a custom project which enabled to isolate
>>> the most critical points (KAS, SH, TKC) from occasional shocks and
>>> PSU failures; anyway it looks pretty foggy to me, as I've read about
>>> it many years ago and lose the documentation! Did you have some more
>>> infos?
>>> Thx
>>> M
>>> --- In yamahacs80@yahoogroups.com, kirkbyte@... wrote:
>>>>
>>>> Hi Max,
>>>>
>>>> That is good news. Just as i had suspected...
>>>>
>>>> Where do you want to put more fuses?
>>>>
>>>> Andrew
>>>>
>>>>
>>>>
>>>>> max fazio <faxiomas@...> wrote:
>>>>>
>>>>> Hi all
>>>>> Happily we solved the problem: 2 4016 CMOS brought their soul
>>> back to
>>>>> the Almighty but , at least, no other problem was found; can
>>> anybody
>>>>> tell me about how to modify the tracks in order to be able to
>>> put more
>>>>> fuses?
>>>>> Thx
>>>>> --- In yamahacs80@yahoogroups.com, "Max Fazio" <faxiomas@> wrote:
>>>>>>
>>>>>> Hi
>>>>>>
>>>>>> Sounds like some CMOS shorted out. Which fuse blew?
>>>>>>
>>>>>> Apparently the one on the left if you look from a higher pov
>>> with the
>>>>> keyboard in front of you
>>>>>> Update: now tensions are regular, those with scary settings
>>> are the
>>>>> ones between KAS and SH
>>>>>> M
>>>>>>
>>>>>>
>>>>>> ----- Original Message -----
>>>>>> From: Andrew Kirkby
>>>>>> To: yamahacs80@yahoogroups.com
>>>>>> Sent: Sunday, April 03, 2011 4:32 PM
>>>>>> Subject: Re: [yamahacs80] Help! Note mess!
>>>>>>
>>>>>>
>>>>>>
>>>>>> Sounds like some CMOS shorted out. Which fuse blew?
>>>>>>
>>>>>> Sent from my iPhone
>>>>>>
>>>>>> On 04/04/2011, at 12:27 AM, "max fazio" <faxiomas@> wrote:
>>>>>>
>>>>>>> Hi all
>>>>>>> I'm writing on behalf of Fernando who's got another problem
>>> with
>>>>> his machine which was eventually about to be fully restored.
>>>>>>> While removing one board in the voices' rig, one of the fuses
>>>>> suddendly blew up and the main voltage jumped to +20V. After he
>>> restored
>>>>> the correct voltage he experienced all kinds of weird sounds
>>> coming off
>>>>> the CS-80.
>>>>>>> I only hope that the KAS didn't break up, so please can you
>>> give
>>>>> me any advice or diagnosis about this problem.
>>>>>>> please help
>>>>>>> M
>>>>>>>
>>>>>>>
>>>>>>
>>>>>> [Non-text portions of this message have been removed]
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> [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
>>
>>
>>
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>

> > Last: can the two tantalium blue caps in the KAS (1uF and 22uF) be replaced with two simple electrolytic, more reliable ones?
>

David, you did not reply :-)
Is it better to replace them?

> > BTW, I replaced all of the trimpots both in the KAS and SH with 8x2= 16 perfectly fitting 10K multiturn ones. The same done with the BA VR3 100K one (calibrating the 4.00 ref Voltage) = great!
>

To whom it may concern:
The right replacement from the (italian) catalogue of RS components is
125-742

TRIMMER T93YB 10K
.

>
> Great ! Any good replacements for the various M-card trimmers? Obviously, the 4 for tuning, but if I ever do a full 16-card calibration again, I'd want to replace all trimmers since many of them are way to sensitive.
>
>

Would be great! Calibrating those screws is a delight... :-)
If anybody already did that, please let us know where to go for those components...

> >
> >
> >
> >
> > Il giorno 05/apr/2011, alle ore 14.33, Andrew Kirkby ha scritto:
> >
> >> Hi Max,
> >>
> >> Personally i'd just add decoupling caps and replace ALL the CMOS in
> >> the unit with new TI stuff. All the old CMOS in the unit will fail -
> >> i'm actually surprised it has lasted this long. CMOS is pretty cheap
> >> though if you are using good quality Mil-Max machined sockets the cost
> >> increases by a rather a large amount :) Also, if you replace all of
> >> the parts in the PSU with new ones you can basically avoid the root
> >> cause of all these issues. I'd also check all of the voltages with a
> >> very high precision multimeter if possible, just to get it spot on.
> >>
> >> In any case, you will get a CS80 that will be inherently more reliable
> >> or at least a lot closer to how it was out of the factory.
> >>
> >>
> >> Andrew
> >>
> >> On 05/04/2011, at 4:56 PM, max fazio wrote:
> >>
> >>> Hi Andy
> >>> I've read somewhere about a custom project which enabled to isolate
> >>> the most critical points (KAS, SH, TKC) from occasional shocks and
> >>> PSU failures; anyway it looks pretty foggy to me, as I've read about
> >>> it many years ago and lose the documentation! Did you have some more
> >>> infos?
> >>> Thx
> >>> M
> >>> --- In yamahacs80@yahoogroups.com, kirkbyte@... wrote:
> >>>>
> >>>> Hi Max,
> >>>>
> >>>> That is good news. Just as i had suspected...
> >>>>
> >>>> Where do you want to put more fuses?
> >>>>
> >>>> Andrew
> >>>>
> >>>>
> >>>>
> >>>>> max fazio <faxiomas@...> wrote:
> >>>>>
> >>>>> Hi all
> >>>>> Happily we solved the problem: 2 4016 CMOS brought their soul
> >>> back to
> >>>>> the Almighty but , at least, no other problem was found; can
> >>> anybody
> >>>>> tell me about how to modify the tracks in order to be able to
> >>> put more
> >>>>> fuses?
> >>>>> Thx
> >>>>> --- In yamahacs80@yahoogroups.com, "Max Fazio" <faxiomas@> wrote:
> >>>>>>
> >>>>>> Hi
> >>>>>>
> >>>>>> Sounds like some CMOS shorted out. Which fuse blew?
> >>>>>>
> >>>>>> Apparently the one on the left if you look from a higher pov
> >>> with the
> >>>>> keyboard in front of you
> >>>>>> Update: now tensions are regular, those with scary settings
> >>> are the
> >>>>> ones between KAS and SH
> >>>>>> M
> >>>>>>
> >>>>>>
> >>>>>> ----- Original Message -----
> >>>>>> From: Andrew Kirkby
> >>>>>> To: yamahacs80@yahoogroups.com
> >>>>>> Sent: Sunday, April 03, 2011 4:32 PM
> >>>>>> Subject: Re: [yamahacs80] Help! Note mess!
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>> Sounds like some CMOS shorted out. Which fuse blew?
> >>>>>>
> >>>>>> Sent from my iPhone
> >>>>>>
> >>>>>> On 04/04/2011, at 12:27 AM, "max fazio" <faxiomas@> wrote:
> >>>>>>
> >>>>>>> Hi all
> >>>>>>> I'm writing on behalf of Fernando who's got another problem
> >>> with
> >>>>> his machine which was eventually about to be fully restored.
> >>>>>>> While removing one board in the voices' rig, one of the fuses
> >>>>> suddendly blew up and the main voltage jumped to +20V. After he
> >>> restored
> >>>>> the correct voltage he experienced all kinds of weird sounds
> >>> coming off
> >>>>> the CS-80.
> >>>>>>> I only hope that the KAS didn't break up, so please can you
> >>> give
> >>>>> me any advice or diagnosis about this problem.
> >>>>>>> please help
> >>>>>>> M
> >>>>>>>
> >>>>>>>
> >>>>>>
> >>>>>> [Non-text portions of this message have been removed]
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>> [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
> >>
> >>
> >>
> >
> >
> >
> > ------------------------------------
> >
> > Yahoo! Groups Links
> >
> >
> >
>

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

Max,


Well i guess then there is no need for new sockets. Excessively
soldering/desoldering will definitely cause problems with traces. You
can use 0.1 ceramics which is what most manufacturers would use for
decoupling. Trace side is probably easier, just make sure you solder
them to the correct pins :)

I always use TI CMOS which is the CD40xx series. No problems there.

You can replace Tantalum caps with Panasonic FM series caps which i
believe are designed as Tantalum replacements. I will investigate this
further for you as to the best possible result.

Adding high precision trimmers will solve a lot of problems with
stability. I am trying to find a good voice board trimmer replacement
but it is difficult to find a high precision trimmer with the leads
and adjustment screw in the correct orientation. If anyone knows of
one, let me know :) I have a CS80 and CS60 to update.

AK

On 06/04/2011, at 3:26 AM, Fernando Zarone wrote:

> Hi All,
> due to the fact that most of the IC sockets had been already
> soldered in place (correctly, by our friend Tommy from Bologna,
> previous owner...), is it convenient to avoid replacing them again
> w/ Mill-Max, both for economic reasons and for not burning the
> traces, soldering, instead, on the trace side ceramic 0.1 caps?
>
> As to the ICs, are the CD series ones OK (CD4016, CD4069 etc.)?
>
> Last: can the two tantalium blue caps in the KAS (1uF and 22uF) be
> replaced with two simple electrolytic, more reliable ones?
>
> BTW, I replaced all of the trimpots both in the KAS and SH with 8x2=
> 16 perfectly fitting 10K multiturn ones. The same done with the BA
> VR3 100K one (calibrating the 4.00 ref Voltage) = great!
>
> Il giorno 05/apr/2011, alle ore 14.33, Andrew Kirkby ha scritto:
>
> > Hi Max,
> >
> > Personally i'd just add decoupling caps and replace ALL the CMOS in
> > the unit with new TI stuff. All the old CMOS in the unit will fail -
> > i'm actually surprised it has lasted this long. CMOS is pretty cheap
> > though if you are using good quality Mil-Max machined sockets the
> cost
> > increases by a rather a large amount :) Also, if you replace all of
> > the parts in the PSU with new ones you can basically avoid the root
> > cause of all these issues. I'd also check all of the voltages with a
> > very high precision multimeter if possible, just to get it spot on.
> >
> > In any case, you will get a CS80 that will be inherently more
> reliable
> > or at least a lot closer to how it was out of the factory.
> >
> >
> > Andrew
> >
> > On 05/04/2011, at 4:56 PM, max fazio wrote:
> >
> >> Hi Andy
> >> I've read somewhere about a custom project which enabled to isolate
> >> the most critical points (KAS, SH, TKC) from occasional shocks and
> >> PSU failures; anyway it looks pretty foggy to me, as I've read
> about
> >> it many years ago and lose the documentation! Did you have some
> more
> >> infos?
> >> Thx
> >> M
> >> --- In yamahacs80@yahoogroups.com, kirkbyte@... wrote:
> >>>
> >>> Hi Max,
> >>>
> >>> That is good news. Just as i had suspected...
> >>>
> >>> Where do you want to put more fuses?
> >>>
> >>> Andrew
> >>>
> >>>
> >>>
> >>>> max fazio <faxiomas@...> wrote:
> >>>>
> >>>> Hi all
> >>>> Happily we solved the problem: 2 4016 CMOS brought their soul
> >> back to
> >>>> the Almighty but , at least, no other problem was found; can
> >> anybody
> >>>> tell me about how to modify the tracks in order to be able to
> >> put more
> >>>> fuses?
> >>>> Thx
> >>>> --- In yamahacs80@yahoogroups.com, "Max Fazio" <faxiomas@> wrote:
> >>>>>
> >>>>> Hi
> >>>>>
> >>>>> Sounds like some CMOS shorted out. Which fuse blew?
> >>>>>
> >>>>> Apparently the one on the left if you look from a higher pov
> >> with the
> >>>> keyboard in front of you
> >>>>> Update: now tensions are regular, those with scary settings
> >> are the
> >>>> ones between KAS and SH
> >>>>> M
> >>>>>
> >>>>>
> >>>>> ----- Original Message -----
> >>>>> From: Andrew Kirkby
> >>>>> To: yamahacs80@yahoogroups.com
> >>>>> Sent: Sunday, April 03, 2011 4:32 PM
> >>>>> Subject: Re: [yamahacs80] Help! Note mess!
> >>>>>
> >>>>>
> >>>>>
> >>>>> Sounds like some CMOS shorted out. Which fuse blew?
> >>>>>
> >>>>> Sent from my iPhone
> >>>>>
> >>>>> On 04/04/2011, at 12:27 AM, "max fazio" <faxiomas@> wrote:
> >>>>>
> >>>>>> Hi all
> >>>>>> I'm writing on behalf of Fernando who's got another problem
> >> with
> >>>> his machine which was eventually about to be fully restored.
> >>>>>> While removing one board in the voices' rig, one of the fuses
> >>>> suddendly blew up and the main voltage jumped to +20V. After he
> >> restored
> >>>> the correct voltage he experienced all kinds of weird sounds
> >> coming off
> >>>> the CS-80.
> >>>>>> I only hope that the KAS didn't break up, so please can you
> >> give
> >>>> me any advice or diagnosis about this problem.
> >>>>>> please help
> >>>>>> M
> >>>>>>
> >>>>>>
> >>>>>
> >>>>> [Non-text portions of this message have been removed]
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>> [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]

Caro Max,

dopo una delle ultime mie performances (sto sostituendo tutti i capacitors e ICs e tirando fuori schede) l'AT e initial touch, con tutte le loro funzioni di pilotaggio, non vanno per nulla se non nell'ultima ottava, da C5# a C6.
da C5 in giù, nulla. Inoltre se senti, per es. i Brass, mi sembra di non sentire l'attack lento. Insomma, ci risiamo.

Mi dai qualche idea sulle tensioni da verificare? devo ancora sostituire molti tantalio (con poliestere) nelle TSB, ma non credo che la causa siano loro. Si rompevano tutti, in entrambi i canali? deve essere a monte il problema! Le tensioni dell'AT dai tasti arrivano ai 4051, da -0,20 a 6V e più sui piedini, il che significa che ... Che significa???

Aiutami, Max, altrimenti spenderò una cifra per spedirla da RL in England da Mr CS80 per farla rimettere a nuovo!

Grazie, so che lo farai...

PS mica sei un tecnico? se no te la mandavo subito :-))

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