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Fwd: [vintagesynthrepair] K2000 outputs blown

Fwd: [vintagesynthrepair] K2000 outputs blown

2004-11-23 by laurent

Hi all,

well, I have narrowed down my search and identified and ordered the offending
parts. It is a set of Junction FETS transistors fitted to each output (6 in
total). I have ordered a set of 10 from Farnell in the uk.
I was planning to fit these myself but since there rather small parts that need
to be soldered and apart from replacing the backlight i've never done that sort
of job, I was wondering if there was somenone technical enough in the uk that
could help me? I live in west London but could travel a bit.
If not, then any advice on how to replace these transistors would be welcome.

Thanks

Laurent

----- Forwarded message from laurent <lists@...> -----
    Date: Fri,  8 Oct 2004 09:41:22 -0700
Show quoted textHide quoted text
    From: laurent <lists@...>
Reply-To: laurent <lists@...>
 Subject: [vintagesynthrepair] K2000 outputs blown
      To: vintagesynthrepair@yahoogroups.com

Hello all,

I just joined this board.
I recently bought a Kurzweil K2000 and am experiencing strange problems.
This Mix outputs are very low and the Headphone outs are very high, cliping at
medium volume.
A quick search on google revealed the following:
"This was a common problem on early K2000's. Later units had a
protection board installed (also available as a low cost upgrade for
older systems). Problem, as I recall, was that static electricity or
floating ground problems could blow the output transistors when
pluggin/unplugging cables to the unit.
There is a transistor on every output that mutes the output when you first
turn on the keyboard.  Static electricity can fry these.  If you plug in an
audio cable to the K2000, THEN plug that cable into an amp, chances are you
will short the tip of the plug to the chassis of the amp.  This will destroy
the transistor.
The remedy is to replace the transistor."

I was wondering if there was any K2K owners on this list who would be familiar
with this issue and how to fix it.

Thanks in advance

Laurent

----- End forwarded message -----

RE: [vintagesynthrepair] K2000 outputs blown

2004-11-23 by Brian Davies

Hi Laurent

I spend much of my life repairing amps and keyboards for a shop local to me \u2013 if you have no other offers I would willingly fit your devices for you. I live near Lingfield in Surrey.

Regards

Brian

-----Original Message-----
From: laurent [mailto:lists@...]
Sent: Tuesday, November 23, 2004 10:43 AM
To: vintagesynthrepair@yahoogroups.com
Subject: Fwd: [vintagesynthrepair] K2000 outputs blown

Hi all,

well, I have narrowed down my search and identified and ordered the offending
parts. It is a set of Junction FETS transistors fitted to each output (6 in
total). I have ordered a set of 10 from Farnell in the uk.
I was planning to fit these myself but since there rather small parts that need
to be soldered and apart from replacing the backlight i've never done that sort
of job, I was wondering if there was somenone technical enough in the uk that
could help me? I live in west London but could travel a bit.
If not, then any advice on how to replace these transistors would be welcome.

Thanks

Laurent

----- Forwarded message from laurent -----
Date: Fri, 8 Oct 2004 09:41:22 -0700
From: laurent
Reply-To: laurent
Subject: [vintagesynthrepair] K2000 outputs blown
To: vintagesynthrepair@yahoogroups.com

Hello all,

I just joined this board.
I recently bought a Kurzweil K2000 and am experiencing strange problems.
This Mix outputs are very low and the Headphone outs are very high, cliping at
medium volume.
A quick search on google revealed the following:
"This was a common problem on early K2000's. Later units had a
protection board installed (also available as a low cost upgrade for
older systems). Problem, as I recall, was that static electricity or
floating ground problems could blow the output transistors when
pluggin/unplugging cables to the unit.
There is a transistor on every output that mutes the output when you first
turn on the keyboard. Static electricity can fry these. If you plug in an
audio cable to the K2000, THEN plug that cable into an amp, chances are you
will short the tip of the plug to the chassis of the amp. This will destroy
the transistor.
The remedy is to replace the transistor."

I was wondering if there was any K2K owners on this list who would be familiar
with this issue and how to fix it.

Thanks in advance

Laurent

----- End forwarded message -----





RE: [vintagesynthrepair] K2000 outputs blown

2004-11-23 by Keith Niver

look up Bill Greenhill on www.mitatechs.com. He's in the UK and an expert.
Tell him Keith Niver sent you from MITA.
 
Keith A. Niver 
Certified MITA tech 
Niver's Service Corp 
801 Columbia St 
Hudson, NY   12534 
518-828-0616, Bus 
518-755-6960, Cel 
kaniver@...
Show quoted textHide quoted text
-----Original Message-----
From: Brian Davies [mailto:briang3oyu@...] 
Sent: Tuesday, November 23, 2004 6:26 AM
To: vintagesynthrepair@yahoogroups.com
Subject: RE: [vintagesynthrepair] K2000 outputs blown


Hi Laurent
 
I spend much of my life repairing amps and keyboards for a shop local to me
- if you have no other offers I would willingly fit your devices for you.  I
live near Lingfield in Surrey.
 
Regards
 
Brian
 
-----Original Message-----
From: laurent [mailto:lists@...]
Sent: Tuesday, November 23, 2004 10:43 AM
To: vintagesynthrepair@yahoogroups.com
Subject: Fwd: [vintagesynthrepair] K2000 outputs blown
 
Hi all,

well, I have narrowed down my search and identified and ordered the
offending
parts. It is a set of Junction FETS transistors fitted to each output (6 in
total). I have ordered a set of 10 from Farnell in the uk.
I was planning to fit these myself but since there rather small parts that
need
to be soldered and apart from replacing the backlight i've never done that
sort
of job, I was wondering if there was somenone technical enough in the uk
that
could help me? I live in west London but could travel a bit.
If not, then any advice on how to replace these transistors would be
welcome.

Thanks

Laurent

----- Forwarded message from laurent <lists@...> -----
    Date: Fri,  8 Oct 2004 09:41:22 -0700
    From: laurent <lists@...>
Reply-To: laurent <lists@...>
Subject: [vintagesynthrepair] K2000 outputs blown
      To: vintagesynthrepair@yahoogroups.com

Hello all,

I just joined this board.
I recently bought a Kurzweil K2000 and am experiencing strange problems.
This Mix outputs are very low and the Headphone outs are very high, cliping
at
medium volume.
A quick search on google revealed the following:
"This was a common problem on early K2000's. Later units had a
protection board installed (also available as a low cost upgrade for
older systems). Problem, as I recall, was that static electricity or
floating ground problems could blow the output transistors when
pluggin/unplugging cables to the unit.
There is a transistor on every output that mutes the output when you first
turn on the keyboard.  Static electricity can fry these.  If you plug in an
audio cable to the K2000, THEN plug that cable into an amp, chances are you
will short the tip of the plug to the chassis of the amp.  This will destroy
the transistor.
The remedy is to replace the transistor."

I was wondering if there was any K2K owners on this list who would be
familiar
with this issue and how to fix it.

Thanks in advance

Laurent

----- End forwarded message -----







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RE: [vintagesynthrepair] K2000 outputs blown

2004-11-23 by laurent

Hi Brian,

yes that'd be really cool, thanks.
It's actually not to bad to get to, I guess 45-60 minutes from where I live
(Uxrbdige)
I've ordered the parts yesterday but I think they come from the states so it
might be 1 to 2 weeks before I get them.

Laurent

Quoting Brian Davies <briang3oyu@...>:
Show quoted textHide quoted text
> Hi Laurent
>
> I spend much of my life repairing amps and keyboards for a shop local to
> me \ufffd if you have no other offers I would willingly fit your devices for you.
> I live near Lingfield in Surrey.
>
> Regards
>
> Brian
>
> -----Original Message-----
> From: laurent [mailto:lists@...]
> Sent: Tuesday, November 23, 2004 10:43 AM
> To: vintagesynthrepair@yahoogroups.com
> Subject: Fwd: [vintagesynthrepair] K2000 outputs blown
>
> Hi all,
>
> well, I have narrowed down my search and identified and ordered the
> offending
> parts. It is a set of Junction FETS transistors fitted to each output (6 in
> total). I have ordered a set of 10 from Farnell in the uk.
> I was planning to fit these myself but since there rather small parts that
> need
> to be soldered and apart from replacing the backlight i've never done that
> sort
> of job, I was wondering if there was somenone technical enough in the uk
> that
> could help me? I live in west London but could travel a bit.
> If not, then any advice on how to replace these transistors would be
> welcome.
>
> Thanks
>
> Laurent
>
> ----- Forwarded message from laurent <lists@...> -----
>     Date: Fri,  8 Oct 2004 09:41:22 -0700
>     From: laurent <lists@...>
> Reply-To: laurent <lists@...>
> Subject: [vintagesynthrepair] K2000 outputs blown
>       To: vintagesynthrepair@yahoogroups.com
>
> Hello all,
>
> I just joined this board.
> I recently bought a Kurzweil K2000 and am experiencing strange problems.
> This Mix outputs are very low and the Headphone outs are very high, cliping
> at
> medium volume.
> A quick search on google revealed the following:
> "This was a common problem on early K2000's. Later units had a
> protection board installed (also available as a low cost upgrade for
> older systems). Problem, as I recall, was that static electricity or
> floating ground problems could blow the output transistors when
> pluggin/unplugging cables to the unit.
> There is a transistor on every output that mutes the output when you first
> turn on the keyboard.  Static electricity can fry these.  If you plug in an
> audio cable to the K2000, THEN plug that cable into an amp, chances are you
> will short the tip of the plug to the chassis of the amp.  This will destroy
> the transistor.
> The remedy is to replace the transistor."
>
> I was wondering if there was any K2K owners on this list who would be
> familiar
> with this issue and how to fix it.
>
> Thanks in advance
>
> Laurent
>
> ----- End forwarded message -----
>
>
>
>
>
>
> Yahoo! Groups Sponsor
> ADVERTISEMENT
> click here
> <http://us.ard.yahoo.com/SIG=1297bf2hs/M=298184.5584357.6650215.3001176/D=gr
> plch/S=1705032144:HM/EXP=1101293572/A=2434970/R=0/SIG=11edksnhv/*http://www.
> netflix.com/Default?mqso=60185402>
>
>
>   _____
>
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>
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>
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> Service <http://docs.yahoo.com/info/terms/> .
>

RE: [vintagesynthrepair] K2000 outputs blown

2004-11-23 by Brian Davies

Hi Keith

As a matter of interest I do all Bill Greenhill's work in the South of
England in a 50 mile radius of Lingfield!

Regards

Brian
Show quoted textHide quoted text
-----Original Message-----
From: Keith Niver [mailto:kaniver@...]
Sent: Tuesday, November 23, 2004 1:01 PM
To: vintagesynthrepair@yahoogroups.com
Subject: RE: [vintagesynthrepair] K2000 outputs blown

look up Bill Greenhill on www.mitatechs.com <http://www.mitatechs.com> .
He's in the UK and an expert. Tell him Keith Niver sent you from MITA.

Keith A. Niver
Certified MITA tech
Niver's Service Corp
801 Columbia St
Hudson, NY   12534
518-828-0616, Bus
518-755-6960, Cel
kaniver@...
-----Original Message-----
From: Brian Davies [mailto:briang3oyu@...]
Sent: Tuesday, November 23, 2004 6:26 AM
To: vintagesynthrepair@yahoogroups.com
Subject: RE: [vintagesynthrepair] K2000 outputs blown
Hi Laurent

I spend much of my life repairing amps and keyboards for a shop local to
me - if you have no other offers I would willingly fit your devices for you.
I live near Lingfield in Surrey.

Regards

Brian

-----Original Message-----
From: laurent [mailto:lists@...]
Sent: Tuesday, November 23, 2004 10:43 AM
To: vintagesynthrepair@yahoogroups.com
Subject: Fwd: [vintagesynthrepair] K2000 outputs blown

Hi all,

well, I have narrowed down my search and identified and ordered the
offending
parts. It is a set of Junction FETS transistors fitted to each output (6 in
total). I have ordered a set of 10 from Farnell in the uk.
I was planning to fit these myself but since there rather small parts that
need
to be soldered and apart from replacing the backlight i've never done that
sort
of job, I was wondering if there was somenone technical enough in the uk
that
could help me? I live in west London but could travel a bit.
If not, then any advice on how to replace these transistors would be
welcome.

Thanks

Laurent

----- Forwarded message from laurent <lists@...> -----
    Date: Fri,  8 Oct 2004 09:41:22 -0700
    From: laurent <lists@...>
Reply-To: laurent <lists@...>
Subject: [vintagesynthrepair] K2000 outputs blown
      To: vintagesynthrepair@yahoogroups.com

Hello all,

I just joined this board.
I recently bought a Kurzweil K2000 and am experiencing strange problems.
This Mix outputs are very low and the Headphone outs are very high, cliping
at
medium volume.
A quick search on google revealed the following:
"This was a common problem on early K2000's. Later units had a
protection board installed (also available as a low cost upgrade for
older systems). Problem, as I recall, was that static electricity or
floating ground problems could blow the output transistors when
pluggin/unplugging cables to the unit.
There is a transistor on every output that mutes the output when you first
turn on the keyboard.  Static electricity can fry these.  If you plug in an
audio cable to the K2000, THEN plug that cable into an amp, chances are you
will short the tip of the plug to the chassis of the amp.  This will destroy
the transistor.
The remedy is to replace the transistor."

I was wondering if there was any K2K owners on this list who would be
familiar
with this issue and how to fix it.

Thanks in advance

Laurent

----- End forwarded message -----










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RE: [vintagesynthrepair] K2000 outputs blown

2004-11-23 by Brian Davies

Hi Laurent that\u2019s not a problem. Let me know when they are arrive and we can make a date for you to pop down. Yes around an hour with ease. M25 to junction 6 and then 10 minutes to here.

Regards

Brian

-----Original Message-----
From: laurent [mailto:lists@...]
Sent: Tuesday, November 23, 2004 1:03 PM
To: vintagesynthrepair@yahoogroups.com
Subject: RE: [vintagesynthrepair] K2000 outputs blown

Hi Brian,

yes that'd be really cool, thanks.
It's actually not to bad to get to, I guess 45-60 minutes from where I live
(Uxrbdige)
I've ordered the parts yesterday but I think they come from the states so it
might be 1 to 2 weeks before I get them.

Laurent

Quoting Brian Davies :

> Hi Laurent
>
> I spend much of my life repairing amps and keyboards for a shop local to
> me \u2013 if you have no other offers I would willingly fit your devices for you.
> I live near Lingfield in Surrey.
>
> Regards
>
> Brian
>
> -----Original Message-----
> From: laurent [mailto:lists@...]
> Sent: Tuesday, November 23, 2004 10:43 AM
> To: vintagesynthrepair@yahoogroups.com
> Subject: Fwd: [vintagesynthrepair] K2000 outputs blown
>
> Hi all,
>
> well, I have narrowed down my search and identified and ordered the
> offending
> parts. It is a set of Junction FETS transistors fitted to each output (6 in
> total). I have ordered a set of 10 from Farnell in the uk.
> I was planning to fit these myself but since there rather small parts that
>; need
> to be soldered and apart from replacing the backlight i've never done that
> sort
> of job, I was wondering if there was somenone technical enough in the uk
> that
> could help me? I live in west London but could travel a bit.
> If not, then any advice on how to replace these transistors would be
> welcome.
>
> Thanks
>
> Laurent
>
> ----- Forwarded message from laurent -----
> Date: Fri, 8 Oct 2004 09:41:22 -0700
> From: laurent
> Reply-To: laurent
> Subject: [vintagesynthrepair] K2000 outputs blown
> To: vintagesynthrepair@yahoogroups.com
>
> Hello all,
>
> I just joined this board.
> I recently bought a Kurzweil K2000 and am experiencing strange problems.
> This Mix outputs are very low and the Headphone outs are very high, cliping
> at
> medium volume.
> A quick search on google revealed the following:
> "This was a common problem on early K2000's. Later units had a
> protection board installed (also available as a low cost upgrade for
> older systems). Problem, as I recall, was that static electricity or
> floating ground problems could blow the output transistors when
> pluggin/unplugging cables to the unit.
> There is a transistor on every output that mutes the output when you first
> turn on the keyboard. Static electricity can fry these. If you plug in an
> audio cable to the K2000, THEN plug that cable into an amp, chances are you
> will short the tip of the plug to the chassis of the amp. This will destroy
> the transistor.
> The remedy is to replace the transistor."
>
> I was wondering if there was any K2K owners on this list who would be
> familiar
> with this issue and how to fix it.
>
> Thanks in advance
>
> Laurent
>
> ----- End forwarded message -----
>
>
>
>
>
>
> Yahoo! Groups Sponsor
> ADVERTISEMENT
> click here
> <http://us.ard.yahoo.com/SIG=1297bf2hs/M=298184.5584357.6650215.3001176/D=gr
> plch/S=1705032144:HM/EXP=1101293572/A=2434970/R=0/SIG=11edksnhv/*http://www.
> netflix.com/Default?mqso=60185402>
>
>
> _____
>
> Yahoo! Groups Links
> * To visit your group on the web, go to:
> http://groups.yahoo.com/group/vintagesynthrepair/
>
> * To unsubscribe from this group, send an email to:
> vintagesynthrepair-unsubscribe@yahoogroups.com
>
>
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> Service <;http://docs.yahoo.com/info/terms/> .
>





RE: [vintagesynthrepair] K2000 outputs blown

2004-11-24 by Keith Niver

Hi Brian
Cool. I met him the last time he was Vegas for the MITA convention. Say
hello to him for me. How's business over there. It's slow here in upstate
New York, at least for me. But I do a lot of teaching as well, so it
balances out. Good luck with the Kurzweil.
 
Keith Niver
Show quoted textHide quoted text
-----Original Message-----
From: Brian Davies [mailto:briang3oyu@...] 
Sent: Tuesday, November 23, 2004 8:36 AM
To: vintagesynthrepair@yahoogroups.com
Subject: RE: [vintagesynthrepair] K2000 outputs blown


Hi Keith
 
As a matter of interest I do all Bill Greenhill's work in the South of
England in a 50 mile radius of Lingfield!
 
Regards
 
Brian
 
-----Original Message-----
From: Keith Niver [mailto:kaniver@...]
Sent: Tuesday, November 23, 2004 1:01 PM
To: vintagesynthrepair@yahoogroups.com
Subject: RE: [vintagesynthrepair] K2000 outputs blown
 
look up Bill Greenhill on www.mitatechs.com. He's in the UK and an expert.
Tell him Keith Niver sent you from MITA.
 
Keith A. Niver 
Certified MITA tech 
Niver's Service Corp 
801 Columbia St 
Hudson, NY   12534 
518-828-0616, Bus 
518-755-6960, Cel 
kaniver@... 
-----Original Message-----
From: Brian Davies [mailto:briang3oyu@tiscali.co.uk] 
Sent: Tuesday, November 23, 2004 6:26 AM
To: vintagesynthrepair@yahoogroups.com
Subject: RE: [vintagesynthrepair] K2000 outputs blown
Hi Laurent
 
I spend much of my life repairing amps and keyboards for a shop local to me
- if you have no other offers I would willingly fit your devices for you.  I
live near Lingfield in Surrey.
 
Regards
 
Brian
 
-----Original Message-----
From: laurent [mailto:lists@...]
Sent: Tuesday, November 23, 2004 10:43 AM
To: vintagesynthrepair@yahoogroups.com
Subject: Fwd: [vintagesynthrepair] K2000 outputs blown
 
Hi all,

well, I have narrowed down my search and identified and ordered the
offending
parts. It is a set of Junction FETS transistors fitted to each output (6 in
total). I have ordered a set of 10 from Farnell in the uk.
I was planning to fit these myself but since there rather small parts that
need
to be soldered and apart from replacing the backlight i've never done that
sort
of job, I was wondering if there was somenone technical enough in the uk
that
could help me? I live in west London but could travel a bit.
If not, then any advice on how to replace these transistors would be
welcome.

Thanks

Laurent

----- Forwarded message from laurent <lists@...> -----
    Date: Fri,  8 Oct 2004 09:41:22 -0700
    From: laurent <lists@...>
Reply-To: laurent <lists@...>
Subject: [vintagesynthrepair] K2000 outputs blown
      To: vintagesynthrepair@yahoogroups.com

Hello all,

I just joined this board.
I recently bought a Kurzweil K2000 and am experiencing strange problems.
This Mix outputs are very low and the Headphone outs are very high, cliping
at
medium volume.
A quick search on google revealed the following:
"This was a common problem on early K2000's. Later units had a
protection board installed (also available as a low cost upgrade for
older systems). Problem, as I recall, was that static electricity or
floating ground problems could blow the output transistors when
pluggin/unplugging cables to the unit.
There is a transistor on every output that mutes the output when you first
turn on the keyboard.  Static electricity can fry these.  If you plug in an
audio cable to the K2000, THEN plug that cable into an amp, chances are you
will short the tip of the plug to the chassis of the amp.  This will destroy
the transistor.
The remedy is to replace the transistor."

I was wondering if there was any K2K owners on this list who would be
familiar
with this issue and how to fix it.

Thanks in advance

Laurent

----- End forwarded message -----






 




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:HM/A=2434970/rand=263916384> 	


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RE: [vintagesynthrepair] K2000 outputs blown

2004-11-24 by Brian Davies

Hi Keith

I certainly will.

Business is slow over here too, but I have other strings to my bow so no
problems.

I have been in the repair business since the early 50s so am supposedly
retired, but seem to do more now than ever!

Regards

Brian
Show quoted textHide quoted text
-----Original Message-----
From: Keith Niver [mailto:kaniver@...]
Sent: Wednesday, November 24, 2004 12:24 PM
To: vintagesynthrepair@yahoogroups.com
Subject: RE: [vintagesynthrepair] K2000 outputs blown

Hi Brian
Cool. I met him the last time he was Vegas for the MITA convention. Say
hello to him for me. How's business over there. It's slow here in upstate
New York, at least for me. But I do a lot of teaching as well, so it
balances out. Good luck with the Kurzweil.

Keith Niver
-----Original Message-----
From: Brian Davies [mailto:briang3oyu@...]
Sent: Tuesday, November 23, 2004 8:36 AM
To: vintagesynthrepair@yahoogroups.com
Subject: RE: [vintagesynthrepair] K2000 outputs blown
Hi Keith

As a matter of interest I do all Bill Greenhill's work in the South of
England in a 50 mile radius of Lingfield!

Regards

Brian

-----Original Message-----
From: Keith Niver [mailto:kaniver@...]
Sent: Tuesday, November 23, 2004 1:01 PM
To: vintagesynthrepair@yahoogroups.com
Subject: RE: [vintagesynthrepair] K2000 outputs blown

look up Bill Greenhill on www.mitatechs.com <http://www.mitatechs.com> .
He's in the UK and an expert. Tell him Keith Niver sent you from MITA.

Keith A. Niver
Certified MITA tech
Niver's Service Corp
801 Columbia St
Hudson, NY   12534
518-828-0616, Bus
518-755-6960, Cel
kaniver@...
-----Original Message-----
From: Brian Davies [mailto:briang3oyu@...]
Sent: Tuesday, November 23, 2004 6:26 AM
To: vintagesynthrepair@yahoogroups.com
Subject: RE: [vintagesynthrepair] K2000 outputs blown
Hi Laurent

I spend much of my life repairing amps and keyboards for a shop local to
me - if you have no other offers I would willingly fit your devices for you.
I live near Lingfield in Surrey.

Regards

Brian

-----Original Message-----
From: laurent [mailto:lists@...]
Sent: Tuesday, November 23, 2004 10:43 AM
To: vintagesynthrepair@yahoogroups.com
Subject: Fwd: [vintagesynthrepair] K2000 outputs blown

Hi all,

well, I have narrowed down my search and identified and ordered the
offending
parts. It is a set of Junction FETS transistors fitted to each output (6 in
total). I have ordered a set of 10 from Farnell in the uk.
I was planning to fit these myself but since there rather small parts that
need
to be soldered and apart from replacing the backlight i've never done that
sort
of job, I was wondering if there was somenone technical enough in the uk
that
could help me? I live in west London but could travel a bit.
If not, then any advice on how to replace these transistors would be
welcome.

Thanks

Laurent

----- Forwarded message from laurent <lists@...> -----
    Date: Fri,  8 Oct 2004 09:41:22 -0700
    From: laurent <lists@...>
Reply-To: laurent <lists@...>
Subject: [vintagesynthrepair] K2000 outputs blown
      To: vintagesynthrepair@yahoogroups.com

Hello all,

I just joined this board.
I recently bought a Kurzweil K2000 and am experiencing strange problems.
This Mix outputs are very low and the Headphone outs are very high, cliping
at
medium volume.
A quick search on google revealed the following:
"This was a common problem on early K2000's. Later units had a
protection board installed (also available as a low cost upgrade for
older systems). Problem, as I recall, was that static electricity or
floating ground problems could blow the output transistors when
pluggin/unplugging cables to the unit.
There is a transistor on every output that mutes the output when you first
turn on the keyboard.  Static electricity can fry these.  If you plug in an
audio cable to the K2000, THEN plug that cable into an amp, chances are you
will short the tip of the plug to the chassis of the amp.  This will destroy
the transistor.
The remedy is to replace the transistor."

I was wondering if there was any K2K owners on this list who would be
familiar
with this issue and how to fix it.

Thanks in advance

Laurent

----- End forwarded message -----














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Need a G key for a Mini Korg

2004-12-01 by Tim Glasgow

Hi folks,

    i've been lurking here for a while and digging 
it, but now i have my own query. Does anybody out 
there have an extra G key for a Mini Korg? i 
think the 770 and perhaps the MS series used the 
same keys.

    i actually had a whole extra keyboard for a 
Mini Korg, but i gave it away to a technician 
friend a few years ago. Silly me.

--t
[london, canada and echo cañon, nyc]

Re: [vintagesynthrepair] Need a G key for a Mini Korg

2004-12-02 by Russ Rose

Hey Tim, I may be able to assist on this one. I have been repairing synths
for near 25 years. If one needs to be junked, I never throw away the
keybeds.Problem is keys are like snowflakes. So the deal is I need to
know the key's footprint. If you can get me a picture or an accurate
drawing, then I'll proceed to search in my museum. Regards, Russ
Show quoted textHide quoted text
> 
> Hi folks,
> 
> i've been lurking here for a while and digging
> it, but now i have my own query. Does anybody out
> there have an extra G key for a Mini Korg? i
> think the 770 and perhaps the MS series used the
> same keys.
> 
> i actually had a whole extra keyboard for a
> Mini Korg, but i gave it away to a technician
> friend a few years ago. Silly me.
> 
> --t
> [london, canada and echo cañon, nyc]
> 
> 
> 
> 
> Yahoo! Groups Links
> 
> 
> 
> 
> 
> 
>

Re: Fwd: [vintagesynthrepair] K2000 outputs blown

2006-11-29 by david_flamant

> ----- Forwarded message from laurent <lists@...> -----
>     Date: Fri,  8 Oct 2004 09:41:22 -0700
>     From: laurent <lists@...>
> Reply-To: laurent <lists@...>
>  Subject: [vintagesynthrepair] K2000 outputs blown
>       To: vintagesynthrepair@yahoogroups.com
> 
> Hello all,
> 
> I just joined this board.
> I recently bought a Kurzweil K2000 and am experiencing strange 
problems.
> This Mix outputs are very low and the Headphone outs are very 
high, cliping at
> medium volume.
> A quick search on google revealed the following:
> "This was a common problem on early K2000's. Later units had a
> protection board installed (also available as a low cost upgrade 
for
> older systems). Problem, as I recall, was that static electricity 
or
> floating ground problems could blow the output transistors when
> pluggin/unplugging cables to the unit.
> There is a transistor on every output that mutes the output when 
you first
> turn on the keyboard.  Static electricity can fry these.  If you 
plug in an
> audio cable to the K2000, THEN plug that cable into an amp, 
chances are you
> will short the tip of the plug to the chassis of the amp.  This 
will destroy
> the transistor.
> The remedy is to replace the transistor."
> 


What is this transistor ?? where is it in the K2000 what is the 
number on k2000 electronic diagram ??

Please help me I miss my K2000

Best regards

David

Re: [vintagesynthrepair] K2000 outputs blown

2006-11-29 by Russell Rose

This is all from memory, so here goes the transistors are actually  
FET's. They are phsically very close to
the various output jacks. Again from memory they are J112 or J113.  
According to Kurzweil techs are not to be
substituted with anything else other than the original part nos. Are  
easily available and can be removed entirely
from the circuit if you dont mind loud pop/clicks in your amp when  
you power up and down the K2000.
Show quoted textHide quoted text
On Nov 29, 2006, at 2:07 PM, david_flamant wrote:

>> ----- Forwarded message from laurent <lists@...> -----
>>     Date: Fri,  8 Oct 2004 09:41:22 -0700
>>     From: laurent <lists@...>
>> Reply-To: laurent <lists@...>
>>  Subject: [vintagesynthrepair] K2000 outputs blown
>>       To: vintagesynthrepair@yahoogroups.com
>>
>> Hello all,
>>
>> I just joined this board.
>> I recently bought a Kurzweil K2000 and am experiencing strange
> problems.
>> This Mix outputs are very low and the Headphone outs are very
> high, cliping at
>> medium volume.
>> A quick search on google revealed the following:
>> "This was a common problem on early K2000's. Later units had a
>> protection board installed (also available as a low cost upgrade
> for
>> older systems). Problem, as I recall, was that static electricity
> or
>> floating ground problems could blow the output transistors when
>> pluggin/unplugging cables to the unit.
>> There is a transistor on every output that mutes the output when
> you first
>> turn on the keyboard.  Static electricity can fry these.  If you
> plug in an
>> audio cable to the K2000, THEN plug that cable into an amp,
> chances are you
>> will short the tip of the plug to the chassis of the amp.  This
> will destroy
>> the transistor.
>> The remedy is to replace the transistor."
>>
>
>
> What is this transistor ?? where is it in the K2000 what is the
> number on k2000 electronic diagram ??
>
> Please help me I miss my K2000
>
> Best regards
>
> David
>
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>

RE: [vintagesynthrepair] K2000 outputs blown

2006-11-30 by David

Thanks for all

Best regards

David

De : vintagesynthrepair@yahoogroups.com [mailto:vintagesynthrepair@yahoogroups.com] De la part de Russell Rose
Envoyé : mercredi 29 novembre 2006 23:33
À : vintagesynthrepair@yahoogroups.com
Objet : Re: [vintagesynthrepair] K2000 outputs blown

This is all from memory, so here goes the transistors are actually
FET's. They are phsically very close to
the various output jacks. Again from memory they are J112 or J113.
According to Kurzweil techs are not to be
substituted with anything else other than the original part nos. Are
easily available and can be removed entirely
from the circuit if you dont mind loud pop/clicks in your amp when
you power up and down the K2000.
On Nov 29, 2006, at 2:07 PM, david_flamant wrote:

>> ----- Forwarded message from laurent -----
>> Date: Fri, 8 Oct 2004 09:41:22 -0700
>> From: laurent
>> Reply-To: laurent
>> Subject: [vintagesynthrepair] K2000 outputs blown
>> To: vintagesynthrepair@yahoogroups.com
>>
>> Hello all,
>>
>> I just joined this board.
>> I recently bought a Kurzweil K2000 and am experiencing strange
> problems.
>> This Mix outputs are very low and the Headphone outs are very
> high, cliping at
>> medium volume.
>> A quick search on google revealed the following:
>> "This was a common problem on early K2000's. Later units had a
>> protection board installed (also available as a low cost upgrade
> for
>> older systems). Problem, as I recall, was that static electricity
> or
>> floating ground problems could blow the output transistors when
>> pluggin/unplugging cables to the unit.
>> There is a transistor on every output that mutes the output when
> you first
>> turn on the keyboard. Static electricity can fry these. If you
> plug in an
>> audio cable to the K2000, THEN plug that cable into an amp,
> chances are you
>> will short the tip of the plug to the chassis of the amp. This
> will destroy
>> the transistor.
>> The remedy is to replace the transistor."
>>;
>
>
> What is this transistor ?? where is it in the K2000 what is the
> number on k2000 electronic diagram ??
>
> Please help me I miss my K2000
>
> Best regards
>
> David
>
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>

RE: [vintagesynthrepair] K2000 outputs blown

2006-11-30 by David

Hi Russell

You\u2019re great !!! very extraordinary great !!!!!!

It was that, my k2000 without these two transistors is working good and the pop at the power Up or Down can be easily avoid.

I don\u2019t want to replace the two transistors because I am sure that the problem comes back in six month

Again a great thanks to you.

Very very best regards

David

PS sorry for my bad English language

De : vintagesynthrepair@yahoogroups.com [mailto:vintagesynthrepair@yahoogroups.com] De la part de Russell Rose
Envoyé : mercredi 29 novembre 2006 23:33
À : vintagesynthrepair@yahoogroups.com
Objet : Re: [vintagesynthrepair] K2000 outputs blown

This is all from memory, so here goes the transistors are actually
FET's. They are phsically very close to
the various output jacks. Again from memory they are J112 or J113.
According to Kurzweil techs are not to be
substituted with anything else other than the original part nos. Are
easily available and can be removed entirely
from the circuit if you dont mind loud pop/clicks in your amp when
you power up and down the K2000.
On Nov 29, 2006, at 2:07 PM, david_flamant wrote:

>>; ----- Forwarded message from laurent -----
>> Date: Fri, 8 Oct 2004 09:41:22 -0700
>> From: laurent
>> Reply-To: laurent
>> Subject: [vintagesynthrepair] K2000 outputs blown
>> To: vintagesynthrepair@yahoogroups.com
>>
>> Hello all,
>>
>> I just joined this board.
>> I recently bought a Kurzweil K2000 and am experiencing strange
> problems.
>> This Mix outputs are very low and the Headphone outs are very
> high, cliping at
>> medium volume.
>> A quick search on google revealed the following:
>> "This was a common problem on early K2000's. Later units had a
>> protection board installed (also available as a low cost upgrade
> for
>> older systems). Problem, as I recall, was that static electricity
> or
>> floating ground problems could blow the output transistors when
>> pluggin/unplugging cables to the unit.
>> There is a transistor on every output that mutes the output when
> you first
>> turn on the keyboard. Static electricity can fry these. If you
> plug in an
>> audio cable to the K2000, THEN plug that cable into an amp,
> chances are you
>> will short the tip of the plug to the chassis of the amp. This
> will destroy
>> the transistor.
>> The remedy is to replace the transistor."
>;>
>
>
> What is this transistor ?? where is it in the K2000 what is the
> number on k2000 electronic diagram ??
>
> Please help me I miss my K2000
>
> Best regards
>
> David
>
>
>
>
>
>;
>
> Yahoo! Groups Links
>
>
>

Re: [vintagesynthrepair] K2000 outputs blown

2006-11-30 by Russell Rose

David, votre englais est plus meilleur que mon francais. A Bientot, Russ
On Nov 30, 2006, at 11:40 AM, David wrote:

Hi Russell

You’re great !!! very extraordinary great !!!!!!

It was that, my k2000 without these two transistors is working good and the pop at the power Up or Down can be easily avoid.

I don’t want to replace the two transistors because I am sure that the problem comes back in six month

Again a great thanks to you.

Very very best regards

David

PS sorry for my bad English language

De : vintagesynthrepair@yahoogroups.com [mailto:vintagesynthrepair@yahoogroups.com] De la part de Russell Rose
Envoyé : mercredi 29 novembre 2006 23:33
À : vintagesynthrepair@yahoogroups.com
Objet : Re: [vintagesynthrepair] K2000 outputs blown

This is all from memory, so here goes the transistors are actually
FET's. They are phsically very close to
the various output jacks. Again from memory they are J112 or J113.
According to Kurzweil techs are not to be
substituted with anything else other than the original part nos. Are
easily available and can be removed entirely
from the circuit if you dont mind loud pop/clicks in your amp when
you power up and down the K2000.
On Nov 29, 2006, at 2:07 PM, david_flamant wrote:

>> ----- Forwarded message from laurent -----
>> Date: Fri, 8 Oct 2004 09:41:22 -0700
>> From: laurent
>> Reply-To: laurent
>> Subject: [vintagesynthrepair] K2000 outputs blown
>> To: vintagesynthrepair@yahoogroups.com
>>
>> Hello all,
>>
>> I just joined this board.
>> I recently bought a Kurzweil K2000 and am experiencing strange
> problems.
>> This Mix outputs are very low and the Headphone outs are very
> high, cliping at
>> medium volume.
>> A quick search on google revealed the following:
>> "This was a common problem on early K2000's. Later units had a
>> protection board installed (also available as a low cost upgrade
> for
>> older systems). Problem, as I recall, was that static electricity
> or
>> floating ground problems could blow the output transistors when
>> pluggin/unplugging cables to the unit.
>> There is a transistor on every output that mutes the output when
>; you first
>> turn on the keyboard. Static electricity can fry these. If you
> plug in an
>> audio cable to the K2000, THEN plug that cable into an amp,
> chances are you
>> will short the tip of the plug to the chassis of the amp. This
> will destroy
>> the transistor.
>> The remedy is to replace the transistor."
>>
>
>
> What is this transistor ?? where is it in the K2000 what is the
> number on k2000 electronic diagram ??
>
>; Please help me I miss my K2000
>
> Best regards
>
> David
>
>
>
>
>
>
>
>; Yahoo! Groups Links
>
>
>




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