minime123 wrote:be careful. we have 3 jd800s with the red goo situation going on. we have one in the studio that we have had for many years that had no signs of that problem, but when i went into the studio the other day and played it from its own keyboard (as opposed to via midi), the keys were a tiny bit sticky. i hope this isn't a sign of things to come. i suspect all 800 keyboard will eventually suffer from this problem if they havent been replaced w a new keyboard mechanism.
No problems here because like many nowadays we sort the problem before it happens. You just need to remove the keys as SOON as you get a JD-800 and bathe them upside down in caustic soda (pour into the weight recesses only) for a few days, this eats the red epoxy away to never be a problem and often still retains the weight - if not you can just reglue them.
Having said this, I have a new black epoxy keybed I took from a mint U-20 (not worth much) to fit as it's a bit tighter than my older original.
And FYI this is a very well known problem for years and there's countless threads and sites about it and how to prevent it. It's not something new. However for a potential buyer on ebay etc it would pay to enquire if the keys have been treated/sorted or if it has the black epoxy/new keybed fitted before buying. So long as there's zero problems when you buy it you can strip it down and sort it before it becomes a problem.
On another note - NEVER disconnect the ribbon cable on the end of the keybed contacts (the part with the clear plastic tab and two black pins) it's actually glued together from the factory and WILL rip the conductive material off. It's not meant to be disconnected so god knows why they even made it able to (the service manual even states never to remove that part). If you need to disconnect then remove it from the board underneath. If you have probs after ripping it apart then you'll end up with key velocity or errant note problems.
Having said THAT , if you are a normal user there should be no reason in the world you would ever go in to disconnect the ribbon anyway.