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Vintage Synth Repair

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Kustom 88

Kustom 88

2004-12-21 by Matt Boyle

I am a semi proud owner of a kustom 88.  About 6 months ago it stopped
working, not completely.  If I hook it up to an amp (no internal speakers)
or headphone jack I can still hear the tremolo and the volume slider still
control still works (there is a bit of static but that was there before).
If I hold down the keys and turn it on I get sound and the notes sustain and
it cannot be controlled by the sustain pedal.  After it is on no sound comes
from the keys.  I have to wait for the power to drain before I turn it on or
I get no sound by the method previously stated.  (ie. If I turn it on while
holding down keys turn it off and hit different keys and turn it back on
within about 10 seconds the previous notes are still sustaining.)  What I am
pretty sure happened was that a capacitor or two went dead when a 12" jensen
speaker was placed on it for an extended period of time.  I know that was
stupid but it was not entirely my fault.  It seems as if not enough power is
getting to the keys to produce sound.  Just the initial current of energy
can do that.  Does anyone know any specific resistors, capacitors, etc that
I should check.  There are an amazing amount of them there.  I am not
expecting anyone to know much about this keyboard in particular but I am
sure that someone has had something similar happen to a like piano.  I have
time if this will be a lengthy process.

Cheers,
Matt

Re: Kustom 88

2004-12-21 by guitarampsky

Hi,
 The K88 was actually built in the Baldwin Organ factory. It is 
partly an EP100 with an extra tremolo board and no amplifier. You may 
have power supply problems, we have original service manuals 
available. Contact me off list & I'll give you the contact 
information.
Mr. Lynn in Arkansas
               <><

--- In vintagesynthrepair@yahoogroups.com, Matt Boyle <Mboyle00@o...> 
wrote:
> I am a semi proud owner of a kustom 88.  About 6 months ago it 
stopped
> working, not completely.  If I hook it up to an amp (no internal 
speakers)
> or headphone jack I can still hear the tremolo and the volume 
slider still
> control still works (there is a bit of static but that was there 
before).
> If I hold down the keys and turn it on I get sound and the notes 
sustain and
> it cannot be controlled by the sustain pedal.  After it is on no 
sound comes
> from the keys.  I have to wait for the power to drain before I turn 
it on or
> I get no sound by the method previously stated.  (ie. If I turn it 
on while
> holding down keys turn it off and hit different keys and turn it 
back on
> within about 10 seconds the previous notes are still sustaining.)  
What I am
> pretty sure happened was that a capacitor or two went dead when a 
12" jensen
> speaker was placed on it for an extended period of time.  I know 
that was
> stupid but it was not entirely my fault.  It seems as if not enough 
power is
> getting to the keys to produce sound.  Just the initial current of 
energy
> can do that.  Does anyone know any specific resistors, capacitors, 
etc that
> I should check.  There are an amazing amount of them there.  I am 
not
> expecting anyone to know much about this keyboard in particular but 
I am
> sure that someone has had something similar happen to a like 
piano.  I have
Show quoted textHide quoted text
> time if this will be a lengthy process.
> 
> Cheers,
> Matt

RE: [vintagesynthrepair] Kustom 88

2004-12-21 by Brian Davies

Hi Matt

 

While I don't know your specific keyboard I do have 50 years of service
experience on similar instruments and I have never ever heard of any passive
components being damage by strong magnetic fields.  I would suggest that
your problem is quite different.  You make a comment about static on the
volume control, by this do you mean that it is scratchy as you operate the
slider?  If this is the case then it is not static it is dust or dirt on the
slider track and can usually be cleaned with a squirt of switch cleaner.
WHATEVER YOU DO DON'T USE WD40!!!!

 

Regards

 

Brian

 

  _____
Show quoted textHide quoted text
From: Matt Boyle [mailto:Mboyle00@...] 
Sent: 21 December 2004 01:59
To: vintagesynthrepair@yahoogroups.com
Subject: [vintagesynthrepair] Kustom 88

 

I am a semi proud owner of a kustom 88.  About 6 months ago it stopped
working, not completely.  If I hook it up to an amp (no internal speakers)
or headphone jack I can still hear the tremolo and the volume slider still
control still works (there is a bit of static but that was there before).
If I hold down the keys and turn it on I get sound and the notes sustain and
it cannot be controlled by the sustain pedal.  After it is on no sound comes
from the keys.  I have to wait for the power to drain before I turn it on or
I get no sound by the method previously stated.  (ie. If I turn it on while
holding down keys turn it off and hit different keys and turn it back on
within about 10 seconds the previous notes are still sustaining.)  What I am
pretty sure happened was that a capacitor or two went dead when a 12" jensen
speaker was placed on it for an extended period of time.  I know that was
stupid but it was not entirely my fault.  It seems as if not enough power is
getting to the keys to produce sound.  Just the initial current of energy
can do that.  Does anyone know any specific resistors, capacitors, etc that
I should check.  There are an amazing amount of them there.  I am not
expecting anyone to know much about this keyboard in particular but I am
sure that someone has had something similar happen to a like piano.  I have
time if this will be a lengthy process.

Cheers,
Matt








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Re: [vintagesynthrepair] Kustom 88

2004-12-21 by Matt Boyle

The static is not from dirt in the slider, it is more of a hiss than static.
I can control the hiss with the volume slider and the other buttons.  That
is not a problem that I am worried about at all.

Matt
Show quoted textHide quoted text
>  
> 
> 
> From: Matt Boyle [mailto:Mboyle00@...]
> Sent: 21 December 2004 01:59
> To: vintagesynthrepair@yahoogroups.com
> Subject: [vintagesynthrepair] Kustom 88
>  
> I am a semi proud owner of a kustom 88.  About 6 months ago it stopped
> working, not completely.  If I hook it up to an amp (no internal speakers)
> or headphone jack I can still hear the tremolo and the volume slider still
> control still works (there is a bit of static but that was there before).
> If I hold down the keys and turn it on I get sound and the notes sustain and
> it cannot be controlled by the sustain pedal.  After it is on no sound comes
> from the keys.  I have to wait for the power to drain before I turn it on or
> I get no sound by the method previously stated.  (ie. If I turn it on while
> holding down keys turn it off and hit different keys and turn it back on
> within about 10 seconds the previous notes are still sustaining.)  What I am
> pretty sure happened was that a capacitor or two went dead when a 12" jensen
> speaker was placed on it for an extended period of time.  I know that was
> stupid but it was not entirely my fault.  It seems as if not enough power is
> getting to the keys to produce sound.  Just the initial current of energy
> can do that.  Does anyone know any specific resistors, capacitors, etc that
> I should check.  There are an amazing amount of them there.  I am not
> expecting anyone to know much about this keyboard in particular but I am
> sure that someone has had something similar happen to a like piano.  I have
> time if this will be a lengthy process.
> 
> Cheers,
> Matt
> 
> 
> 
> 
> 
> 
> Yahoo! Groups Sponsor
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Kustom 88

2005-05-26 by Matt Boyle

A while back I emailed this list about a problem with my Kustom 88 piano and
most people responded saying that it was the power supply.  I am just now
getting around to fixing it.  I have one problem...  I don't know where to
find this power supply.  I copied these numbers off the side of it and I
hope that someone may be able to point me in the right direction.

C0512 (?CO512?)- 103900

CIN-TRAN 1358

Thanks,
Matt

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