PRINTED AND THERMALLY BOUND THE:SANSUI AU-X517R AU-α507R STEREO INTEGRATED AMPLIFIER SERVICE MANUAL INCLUDING BLOCK DIAGRAMS, SCHEMATIC DIAGRAMS, PRINTED CIRCUIT BOARDS (PCB'S), AND PARTS LIST 16 PAGES IN ENGLISH.......AND WHILE YOU ARE WAITING FOR IT, WHY NOT DOWNLOAD IT RIGHT AWAY ON PDF FROM OUR SITE FOR ONLY A SMALL FEE. VERY USEFUL IF YOU WANT TO ENLARGE A DIAGRAM. JUST GO TO: THEMANUALSSERVICE DOTCOM AND TYPE THE MAKE AND MODEL YOU NEED INTO THE SEARCH BOX. PS WE HAVE THOUSANDS.