On: It's your device, you should be able to repair it

[anonymousiam]

Open up that old transistor radio and you will usually find a tiny printed schematic diagram affixed to the inside of the removable cover.

[SideQuark → anonymousiam]

Nope :) As a kid taking everything apart, and as an adult collecting some old gadgets I had as kid, there is generally no such thing. I just listed quite a few gadgets that definitely do not have schematics glued inside.