Televisão vs. televisor
The Portuguese words televisão and televisor are related to the concept of television but are used in slightly different contexts, referring to different aspects of this technology.
Televisão
A1Televisão refers to the concept of television as a broadcast medium or as a general idea. It can also mean watching television or the TV programming itself.
Eu gosto de assistir televisão à noite.
(I like to watch television at night.)
A televisão está com má recepção.
(The television (broadcast) has poor reception.)
A programação da televisão hoje está ótima.
(The TV programming today is great.)
Televisor
B1Televisor refers specifically to the physical device or unit used to watch television broadcasts, also known as the TV set.
O televisor quebrou, precisamos comprar um novo.
(The TV set is broken, we need to buy a new one.)
Esse televisor tem uma tela de 50 polegadas.
(This TV set has a 50-inch screen.)
Levaram o televisor da sala para o conserto.
(They took the TV set from the living room for repair.)
Summary
In summary, televisão is used to talk about television as a concept, broadcast, or programming, while televisor specifically refers to the physical device or TV set. The context determines which word to use appropriately.