>Because back then a TV cost an arm and a leg and they broke more often. Being maintainable was a requirement for the initial sale.
Cars being a significant expense do not come today with a schematic or repair manual.
Cars being a significant expense do not come today with a schematic or repair manual.
The thing is that having the manual or not is not the problem, is the equipment you’ll need that is hard to get, and not only that, for cars you may only use them once, for that particular car, that particular repair, and it may cost hundreds. Maybe if you keep the car for 15 years and 300k miles you get to use it again.
Same with the equipment you need to do circuit repair nowdays.
Back in the day the boards were simple, big and you could use a $10 soldering iron to fix things. Now a regular soldering iron tip covers 3 components at a time.
Haven’t been able to find anything that doesn’t have someone on YouTube replacing it.
Buyers want their durable goods to be durable. They don’t want to spend a significant chunk of their income on a product and be stuck with a broken product next year. Whether that’s a 10 year 100,000 mile warranty, or a schematic you can take to your local TV repair man, they don’t care.
For example just adding air conditioning to a normal family sedan back then would cost the equivalent of $10000 USD nowadays.
If your fine with paying $10000 for an air conditioner, $20000 for an electric driver's seat, another $20000 for an electric passenger seat, $10000 for heated seats, $30000 for ventilated seats, etc... then I'm sure manufacturers would be more than willing to supply a transistor level diagram.