[serf]

>I wish more companies would provide it - akin to the old TVs and other equipment that came with [full!] schematics inside. It would let me truly understand and modify the items that I purchased.

I had forgotten about that thing with the wiring diagrams; I loved that.

That was the only thing that enabled me to repair a 1940s pinball machine that was essentially a relay-driven mechanical computer. Without those prints the machine would have surely been a loss due to the insane complexity and lack of interested/trained people that know how to work on such devices.

One wonders now how many lost pieces of equipment that could help to save from the recycling bin nowadays.