Vintage Synth Repair

Hello all. I have a Kurzeil Mark 10 with three different midi options 
and a flopy drive. I'm sure that there's something available to plug 
in, or stick in the drive to make the Hammond sound from this 
keyboard. However, up to now my efforts have fruitless. Also, my 
Hammond C-2, has a dead note. The lower A note on the bottom keyboard 
is dead. I sometimes use for the bass  that seems to complete the 
effect that I want. Anyone know how to fix this and care to share 
that information with me? Thanks.......... Mark, from Missouri..

Hi Mark

 

Without seeing a problem for myself it is difficult to make much of a
diagnosis.  However experience does suggest that for a single key being
non-operational I would plum for a faulty contact.

 

The majority of modern (ish) keyboards use a conducting rubber contact
pressing down onto a pair (or more) conducting pads on a printed circuit
(PCB).  If these pads get dirty they can cause all sorts of problems.  The
service cure is to remove the key assembly, remove the PCB and this will
reveal what type of contact is used.  Having got that far clean the neoprene
rubber strip and the PCB pads , I use mentholated spirits.  A better cleaner
but generally no longer available was Flurosol.

 

If this is not successful the next step is to replace the neoprene rubber
contact strip.  As a matter of interest when ever I have a keyboard in for
cleaning or repair that involves the keys I always replace this contact
strip as a matter of course.

 

I hope this helps.

 

Regards

 

Brian.

 

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From: kramwaler_1 [mailto:kramwaler_1@...] 
Sent: Tuesday, 01 February, 2005 20:50
To: vintagesynthrepair@yahoogroups.com
Subject: [vintagesynthrepair] Two questions: Hammond sound, Hammond fix.

 


Hello all. I have a Kurzeil Mark 10 with three different midi options 
and a flopy drive. I'm sure that there's something available to plug 
in, or stick in the drive to make the Hammond sound from this 
keyboard. However, up to now my efforts have fruitless. Also, my 
Hammond C-2, has a dead note. The lower A note on the bottom keyboard 
is dead. I sometimes use for the bass  that seems to complete the 
effect that I want. Anyone know how to fix this and care to share 
that information with me? Thanks.......... Mark, from Missouri..






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Hello Mark:Being a Hammond repairman I think that for you to have a 
completely dead note I would check out the bakelite wafer that operates the 
contacts under the key to see if it is broken,I think this because Hammonds 
have multiple contacts for each note that go to individual tone generators 
to get the different harmonics,and the only way for a key to be completely 
dead is for all the contacts on the keyswitch to be failing.if this wafer is 
broken it's a major project to replace it.it might be the metal tab on the 
key itself that pushes the contact down is broken or bent,if this is the 
case then it is a minor repair job,if you need a replacement key let me know 
I have hundreds of them.
Good luck,
Tim K.



direct link to my Ebay store.
http://www.sonicelectronicmusic.com

>From: "kramwaler_1" <kramwaler_1@...>
>Reply-To: vintagesynthrepair@yahoogroups.com
>To: vintagesynthrepair@yahoogroups.com
>Subject: [vintagesynthrepair] Two questions: Hammond sound, Hammond fix.
>Date: Tue, 01 Feb 2005 20:50:09 -0000
>
>
>
>Hello all. I have a Kurzeil Mark 10 with three different midi options
>and a flopy drive. I'm sure that there's something available to plug
>in, or stick in the drive to make the Hammond sound from this
>keyboard. However, up to now my efforts have fruitless. Also, my
>Hammond C-2, has a dead note. The lower A note on the bottom keyboard
>is dead. I sometimes use for the bass  that seems to complete the
>effect that I want. Anyone know how to fix this and care to share
>that information with me? Thanks.......... Mark, from Missouri..
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>
>
>
>