This is the 1995 verison, but it should apply to just about all of them with a few minor changes here and there:
http://www.supracentral.com/foundation/mkiv-a340e-repair/
http://www.supracentral.com/foundation/mkiv-a340e-repair/
Dangit!
Broken link now.
The Supra manual is available here
http://kai.supramania.com/Supra/A340 Series Repair Manual (RM216).pdf