Just got an Elka MK88 - and of course the aftertuch is not working. I need to so service - change the rubber strip that sells here is the obvious, are there any other parts wich wears that would be good to change ? If so, were can I find them ?
Sometimes its not the rubber strip, several other forums listed dry solder connections and a problem with the power supply. Can you get it to work using midi? If midi works then its not the rubber strip.
I can’t find a source for a replacement strip. There are conductive rubber pad replacements that show up on ebay from time to time, and conductive paint that works, but is hard to get consistent depth so all keys hit evenly.
” Can you get it to work using midi? If midi works then its not the rubber strip.”
I get basic midi out signal, on / off and velocity. And I can get aftertuch on some keys if i press very hard. I then keep pressing the key after it hit bottom. What conclusion can be made of that ?
The spare rubberstrip is sold here. Like $15. Plan now is to take it all apart, clean sensors and change the pads. ( if I can find any spare pads) and a new rubber strip. There are som midi notes that are not ”clean”, so there seems to be some wear. This must have been a wonderfull keybed when new.
But I’d like to be sure there’s no other fault with it before I put in all the work. Have you found any info on MK88 on other sites ?
Thanks 
for your input. Much obliged !