I'm done working under the chassis. Next up, I'll reinstall the flyback, hook up a CRT and attempt a power up. I'll have to clear off space on the workbench and squeeze in the 21" CRT unit and 25' foot cable. Not exactly the most convenient setup!
I noticed they have one side of the AC line goes all the way from the chassis AC plug down one 25' wire to a safety interlock inside the CRT and back down another 25' wire. So the set is effectively always running on a 50' extension cord. I assume that's a safety feature so the set can't be turned on with out the CRT plugged in. There must be some losses associated with that setup though. I'm almost tempted to short it out in the chassis.