The days of free service manuals, available to practically anyone who asks are long over. They are gone like electronic repair shops on practically every street are gone. The price of producing such manuals makes certain that few are produced, and these few go directly to licensed service providers.True service manuals for everyday consumer electronics are practically impossible to find, as very little is actually meant to be serviced, most are meant to be thrown away, or complete modules simply replaced...with very little troubleshooting, and almost zero repair knowledge.
I remember the good-ol days when Even Radio Shack printed a complete parts list, and schematic for EVERY product that it sold at the back of the operations manual. I still remember the user manual for a 1980s Radio Shack colour Tv it was as thick as a phone book, because almost 90% of it was schematics and parts listings...and each part had its Radio Shack catalogue number.