I'm not sure if anyone's found this before, but I accidentally surfed my way into one of Sony's repositories of service manuals. I think this is normally a username/password protected area of the site (if you back out to the basic part of the URL, you'll get prompted to log in). How long this will last before it gets "locked down" is anyone's guess.

http://esi.sony.ca/esupport/es...%20Service%20Manual/

click any link to the right (I think they're dates) > this cd > indexpa.htm

The content tends mostly toward newer stuff, as one might expect, but I did find some older stuff like the WM-D6C hidden in there.

Thanks for that-I look at manuals on there a lot.

What's interesting that other sources of Sony manuals (eg. docs.sony.com/reflib) require a login and no easy way to access the manuals directly.