[sdiy] Roland JX-10 Aftertouch

[Chris Strellis]

Hi Gergo,

> Apropo Roland JX-10 ... We have one and the "Aftertouch" 
> doesn't work at all ...

I got my JX-10 after touch going a few months back.

The keyboard needed the most attention.  I freed the keyboard rack 
finally and set about taking every key off - 76 of the blighters.  
You need to take off the clear plastic strip at the back of the keys 
which is held by double sided tape.  Then take all the springs off 
the keys.  Long ones are for the black notes and short ones are for 
the white notes.  Then pull the keys forward and up.  I cleaned out 
the accumulated dust and cleaned the keys themselves. Once done I 
removed the rubber contact switches and cleaned the contacts on the 
PCB and the rubber with isopropryl alcohol.  I removed the top of the 
after touch sensor strip (felt pad with plastic and conductive strip) 
and cleaned the bottom and top contacts of this too.  After putting 
it all back together, all keys now work and the after touch is really 
sensitive.  This took about 3 hours in all which I did over 3 days.  
Well worth the effort.

Cheers

Chris