In Australia the manual is available from Yamaha's documentation provider
stephen@hcsd.com.au, it costs AUD20 and he will take overseas orders. VISA/MasterCard details have to be provided by phone. If interested, send him an email with your address and telephone details and he will get back to you. Australia is GMT+10 if you are going to call. I have purchased 2 Yamaha manuals from him in the past without any issues.
Info provided by Stephen:
Service Manual (115 pages) available as PDF for $20.00 payable visa / mastercard
Please call by phone to arrange purchase
Kind Regards,
Stephen Rendell
02-6223-2626
0468-320-916
From overseas +61468320916 or +61262232626