Their policies seem to change regularly. When they were distributing them freely, they would no longer send them to me. A friend who needed one so I could repair his amp telephoned them and asked why they wouldn't send them to me (I didn't care enough to bother) and they told him that they were concerned that I was trying to reproduce their amps.
Some manufacturers only allow access through their dealers. It makes it easier for the manufacturer.
If you can't find the schematics, try again in a couple of weeks. You may get a different support person that's willing to provide the schematics.