Krakit Posted October 23, 2006 Share Posted October 23, 2006 Here's something strange. My Super JX went mute a couple of months ago. Otherwise, it functions perfectly. I can change patches and see the MIDI indicator light when I hit keys, but nothing comes out. Not from the headphone jack, or any of the four outputs. I had just called a service center to make and appointment and took it out of the rack. When I got in on the floor I decided to give it one more try. Lo And Behold, it worked again. I'm still going to have it serviced. Can anyone think of what's wrong. NO it isn't the volume control. :^) Carl Link to comment Share on other sites More sharing options...
The Captain Posted October 23, 2006 Share Posted October 23, 2006 May help - may not... I once had a problem with a kurtz rackmount sampler that behaved like this. The tech showed me where the outputs had these little transistors which were supposed to prevent "pops" when changing the sound. He said sometimes they went south and "stuck closed". Since I didn't care about popping between patches, he just clipped mine off. Worked fine after that.... Link to comment Share on other sites More sharing options...
dementedchord Posted October 23, 2006 Share Posted October 23, 2006 yep cap'n that's sometimes a problem... they also get noisey as hell and i've modded unit's for guy's by elimineting them... however since in this case the headphone went too it's doubtful... but coming back on is a great sign... may be pita but probably just a bad connect somewhere... 75-80% of the time it comes down to physical not electrical... good luck.. "style is determined not by what you can play but what you cant...." dave brubeck Link to comment Share on other sites More sharing options...
Krakit Posted October 24, 2006 Author Share Posted October 24, 2006 I've pretty much reached the conclusion that there's a cold solder join somewhere. However, I've been putting of the eprom upgrade for over a year now. I think I'll get it upgraded, all tuned up, maintanted and spiffed out by the service center. I'm sure it will be worth it. Carl Link to comment Share on other sites More sharing options...
Krakit Posted December 7, 2006 Author Share Posted December 7, 2006 Got my MKS70 back on the 2nd of Dec. Cost me only $90 cash for all the work. Yesterday, I got around to putting it back into my rack and firing it up. Still sounds great. I'll keep you posted on anything unusual. Carl Link to comment Share on other sites More sharing options...
Marzzz Posted December 7, 2006 Share Posted December 7, 2006 Where did you send it for repair? Link to comment Share on other sites More sharing options...
Krakit Posted December 7, 2006 Author Share Posted December 7, 2006 Place called MIIR listed on Roland's site. I went there personally to drop off and pick up. The diagnosis was that the power supply land wasn't making contact and was arcing to make good. Carl Link to comment Share on other sites More sharing options...
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