Welcome to the forum, there is a wealth of information on here about the TV22.
I have restored quite a few of these iconic set's.
Before thinking of powering it up, it is well worthwhile to pass a current through the overwind of the line output transformer to drive out any moisture, as these are a common failure point on these sets.
Also check the resistance of the blocking transformer for open windings, these are also known to fail.
Good luck with the set, they are a good performer once overhauled.
Mark