......I have Sony's STR-DA5600ES and STR-DN1020 A/V receivers. Great receivers but there were times I thought the Operating Instructions Manuals were written by a partly trained ape.
I actually called Sony about their manuals. Seems they get the info from Japanese engineers, write the manual in Japanese and then translate that into the various languages that the manuals are written. Since they are relying on engineers who aren't really able to address operating instructions on the level Joe Six-Pack (or I) can understand, you end up with a manual that only an engineer can understand.
What's really astounding is that you CAN figure out what Sony manuals mean (sort of) after a lot of tinkering and study, which is something you can't say for other manufacturer's manuals. Toshiba, for instance.
Microsoft makes manuals for all it's programs that are easy to understand. I kinda doubt they outsource the manuals to other countries. I used to read the manuals for Excel, Word, Access (terrible data base, I think) and other programs before teaching classes for those programs.