I changed the belt in my Luxman RX-102 in maybe two hours one night. It may not be a bad idea to keep a digital camera handy if you don't trust your memory as you go, and be sure to keep your screws in an order you can remember. I am new at attempting repairs, and this was one of my first repairs, and I did the repair without instructions - other than I knew I was looking to replace a belt inside that mechanism somewhere. By the way, I liked the RX-102 enough that I bought its big brother the RX-104 (but I bought that one in non-working condition, and it won't even power on - yet). I've also owned other Luxman gear including a few tuners, R-1050, C-1010, L-210, L-580, R-106 and so on.
As you break into that little box with all the gears, etc... you realize there is a lot of work in it considering that it does so little. I liked the idea that so much extra work went in to making that face move just a little.
(I am also interested in finding the remote control # for the RX-104.)