hi!
Where are You from? I'm asking this because I bought a XP-80 with an english manual, although I live in Germany. I've asked at the german Roland Service if I could get a german manual. I just had to give them the serial number of the instrument, the date and the store I bought it and then I got the manual for free.
I have both manuals for the JD-800. The second one is 1,5 times thicker (right spelling?). And that is where all the secrets are explained
.
Sorry, I have no idea where an online-manual could be...