Antix Posted May 13, 2010 Report Share Posted May 13, 2010 Hi , After years of sleep I powered on my Roland D50 . It works fine...very fine but aftertouch ( from its keyboard ) do not responds. :no: From MIDI aftertouch works normally so it is a keyboard sensors problem. In the net i read that it is a common problem on some Roland products ( JD800,D50 ) and it is caused from resistor in the pressure sensor amplifier that change its value in the years. Is anybody experienced of this or knows a link useful for solving this problem? :console: Best Regards Antix Quote Link to comment Share on other sites More sharing options...
Shuriken Posted May 13, 2010 Report Share Posted May 13, 2010 Hi , After years of sleep I powered on my Roland D50 . It works fine...very fine but aftertouch ( from its keyboard ) do not responds. :no: From MIDI aftertouch works normally so it is a keyboard sensors problem. In the net i read that it is a common problem on some Roland products ( JD800,D50 ) and it is caused from resistor in the pressure sensor amplifier that change its value in the years. Is anybody experienced of this or knows a link useful for solving this problem? :console: Best Regards Antix This maybe? http://www.bustedgear.com/repair_Roland_d50_key_contacts_2.html Quote Link to comment Share on other sites More sharing options...
Antix Posted May 13, 2010 Author Report Share Posted May 13, 2010 Hi Shuriken, Thank You for the answer but unfortunately I have not a contact problem. Key Contact and dynamic works fine . The problem is the aftertouch. I am start to thinking that maibe useful a D50 schematic to see the zone of aftertouch and make some measures. Effectively if I push very hard on keys a very minimal sound variation exist. At the end in my town is there a Roland service center but I'm sure they will ask me a lot of money....so first I wont to try myself. Regards Antix P.S. the site You indicate is fine Quote Link to comment Share on other sites More sharing options...
Shuriken Posted May 13, 2010 Report Share Posted May 13, 2010 Here is the D50 Service Manual It seems there is some people on electro-music.com who seem to know a lot about the D50 techically. Maybe you can try and ask there. Quote Link to comment Share on other sites More sharing options...
Antix Posted May 13, 2010 Author Report Share Posted May 13, 2010 Yes, I will ask. It seems that a lot of aftertouch sensors going to oxidize then a good cleaning may solve the problem. Thank for the link for the manual. Regards Antix Quote Link to comment Share on other sites More sharing options...
Shuriken Posted July 2, 2010 Report Share Posted July 2, 2010 I noticed you fixed them today. So tell us your secret :ahappy: Quote Link to comment Share on other sites More sharing options...
Antix Posted July 27, 2010 Author Report Share Posted July 27, 2010 Sorry for delay. On the bender board I have resoldered cursors ( pot ) and other SMD and PTH. The whole cause of malfunction was ( like old philips television ) a degradation of the PTH solderings. You can see , with magnifyng lens , like a little darker circle in the soldering around the pin. After resoldering pins of the cursors aftertouch starts ( restarts ) to work but I gave a little shot to all the soldering on this board. Regards Antix Quote Link to comment Share on other sites More sharing options...
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