[Arran]

I work from a more old fashioned, but reliable method, I make a photocopy of the original service info, since I already have most of the manuals I need, and own a B&W copier, then I can do as I like with them, and the originals stay safe. There are some online sources with good scans, such as Pacific TV, and occasionally Electrotanya, which are good for Canadian and European sets, either because I don't have the diagram or because I'm lazy and just want to look at something without going through a book.
Regards
Arran