That sets kine / picture tube is of such a LARGE mass, compared to the low level heat that it can / and will s. .l . o . w . l . y create is not a problem.
Your worst case situation, is if you were to take that, WELL CHILLED tv into the heated house and then immediately turn it on.
Remember . . . . . cold eyeglasses . . . . .introduced into a WARM environs ?