So I’ve had my S90xs for about 5 years now. The past year or so I’ve had to take my keyboard in to the “authorized Yamaha dealer” (aka...this dude who lives in town and basically does all the electronic repair work for every music store in town) to repair sticky keys. Basically when I press them down they don’t tend to come back as quickly. I’ve already had to fix 3 Keys now. Is there a service manual anywhere around so I can just start doing it myself? I’m really tired of having to send it off via local music store, who then sends it off to the local guy in town. If anyone knows of a service manual I could buy somewhere or possibly download a pdf version? That would be awesome.

Also does Yamaha offer a Keybed warranty or anything? My old Yamaha P-120 had a one time keybed replacement done about 6 years ago. Yamaha offered to pay for the whole thing and replaced all my keys. Does something like this exist for the S90xs line?