I don't get this.

I've had a link in my favourites to the Yamaha Japan manual site for ages (you can get there via Yamaha Europes home page). Unless my details are in a cookie I don't know about, then I am not logging into this site or doing anything special.

So I've just gone to my link:
http://www2.yamaha.co.jp/manual/english/index.html

Then accepted the license agreement
And then chosen "Electronic Musical Instruments" on the search page

Then searched for Tyros..

And downloaded the manual (all 8 meg of it - 176 pages, three languages).