Best is to ring out the flyback with a tester. Here is another sneaky trick.
unhook the Hoz out primary & put the hoz section of another yoke in its
place. If the hoz out draws apx 200 ma ( see manual ) everything is good up to
there. Works great on SS sets too !
If it uses a double breaker it will have 3 terminals & a 4th to
the metal case so it needs to be soldered in. 2 terminals are the break point for
the AC or B+. The 3rd goes to the cathode of the hoz out. There is a resistor
inside that goes to GND. If the hoz stage draws too much the resistor gets hot
& pops the breaker.
73 Zeno
LFOD !