[sdiy] OT: JX-3P Keyboard Contacts

[Czech Martin]

Thanks, this gives me some hope, cause
to D70 is now in the cellar...

So you say that the conductive coating on the little black
rubber things wears out, or that the plastic printed circuit
foil below is dirty. What did you use for the foil to clean?

Perhaps a new conductive coating on the black rubber will help?
Silver or gold "paint"?
 
Ok, may be I give it a last try.
I think that on the D70 all keys have to be plugged out,
so 76 keys...

m.c.

> -----Original Message-----
> From: Oakley Sound [mailto:oakley at techrepairs.freeserve.co.uk]
> Sent: Donnerstag, 11. September 2003 15:06
> To: synth-diy
> Subject: Re: [sdiy] OT: JX-3P Keyboard Contacts
> 
> 
> MC> I did the replacing/cleaning several times, with no avail.
> 
> Martin I think you have been very unlucky. I have only 
> replaced one set
> of pads (just seven notes) on my D-50, and they and the rest of the
> keyboard are still going strong. This is my main machine, and I hammer
> it. [very loud playing action - some sort of latent 
> aggression no doubt
> :-)]
> 
> And I have replaced many other contacts in my job as a Roland 
> tech, and
> have yet to redo any of them. Never done a D70 though... but I don't
> think its that different from the rest of them. What doesn't 
> work though
> for me, is cleaning the rubber contacts. With air, water, IPA (the
> alcohol not the beer) or whatever, cleaning them is a short term fix
> only. I do usually clean the contacts on the PCB though.
> 
> But you are right, they do suck in the dust over time, but I 
> have found
> that the reason most actually fail appears to be worn out contacts as
> opposed to being simply dirty.
> 
> As for getting at the pads Gavin. You need to take out the keys ABOVE,
> not below, the dodgy note... and a few around the pad set that need
> replacing/cleaning. Most pad sets are in sevens and fives I think. So
> you'll have to take out at least five or seven notes to be able to
> remove the old pad set.
> 
> And don't forget you'll need to remove the silly bit of sticky plastic
> under the keyboard assembly that stops the keys from moving forward...
> and then put it back once the job is complete.
> 
> Regards,
> 
> Tony Allgood                       Penrith, Cumbria, England
> 
> Oakley Sound Systems                   www.oakleysound.co.uk
> Modular Synthesisers      www.oakleysound.co.uk/projects.htm
> 
>