Vintage Synth Repair

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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