Members Karma1 Posted October 10, 2008 Members Share Posted October 10, 2008 I'm (reluctantly) planning to sell my JD-800 to a friend, but it has some issues I need to fix first. From the research I've done it seems that both issues - 3 keys not working and parameter values changing by themselves ("auto-editing") are due to dust inside the synth. I have a friend who is an electronic engineer and musician coming over to help me open it up and check things out. I just flipped it over to look at the bottom and there are an incredible number of screws there! I'm guessing that some of them are for securing circuit boards. But does anyone know which ones I have to remove to open open it up? Hopeully not all of them.Any advice about this or addressing the above issues - especially cleaning the contacts - would be greatly appreciated. As much as I hate to sell the JD-800, I'm definitely keeping my JD-990 and all the ram cards with my custom sounds. I'll be triggering it with my new (used) Roland V-Synth that I just got off Craig's List. Should be a great combination. Link to comment Share on other sites More sharing options...
Members augerinn Posted October 10, 2008 Members Share Posted October 10, 2008 On most synths, I remove the outer screws around the perimeter first. Sometimes you'll have to take out ones on the back jack assemblies too. The screws in the middle sometimes hold the keybed assembly in. In every synth I've opened, the circuit boards are held in internally. Take you time, document what you do, keep the parts in a jar, use a digital camera when you remove the keybed so you know which cables to replace where. When you get to the keybed assembly, be very careful removing the gray rubber strips. They tear. Most of the time all I have to do is clean the carbon contacts and re-assemble. If somethings been spilled on it, you may be out of luck. Anyway, a good take-it-apart-and-clean-it-and-put-it-back-together will often do wonders. Link to comment Share on other sites More sharing options...
Members flat earth Posted October 10, 2008 Members Share Posted October 10, 2008 Augerinn is not wrong. Its almost always the grey rubber strips that cause dead notes. (see this thread i posted for pics): As pointed out in the session, you can change the strips round tempararily(and carefully!) to see if it sorts out the problem. Remember the 5th strip is longer than the lower 4 octaves if you purchase new ones! http://acapella.harmony-central.com/forums/showthread.php?t=1705773&highlight=jd800 As for the parameters changing themselves, ive yet to find an easy way to fix this, but it is mainly due to dust in the sliders i beleive. Link to comment Share on other sites More sharing options...
Members ChristianRock Posted October 10, 2008 Members Share Posted October 10, 2008 Yeah I went all crazy with unscrewing all screws on the back of my Fusion when I upgraded the memory, and I ended up detaching the keybed, which was not something I had to do at all Good advice from augerinn and a good read from flat earth's thread. Hopefully it was all just dirt and you'll have your JD800 working well in no time. Link to comment Share on other sites More sharing options...
Members Karma1 Posted October 10, 2008 Author Members Share Posted October 10, 2008 Thanks for the responses, info, link, etc. - much appreciated. Link to comment Share on other sites More sharing options...
Members kolakube Posted April 4, 2009 Members Share Posted April 4, 2009 did you ever get this fixed? My JD800 has gone mental also :/ Link to comment Share on other sites More sharing options...
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