SyncroGuide tannin my hide!

[Zenith26kc20]

If you have a VTVM I would check across the wires going to the horizontal section of the yoke where they attach under the chassis. I would be hesitant to use a digital meter as they can be damaged too easily by the RF. There should be some AC (high frequency) across the wires. It sounds like an open in the yoke circuit to me. That set will give high voltage with the horizontal yoke circuit open, just not alot. The yoke is actually across pins 4 and 5 of the flyback with the yoke coupling in series with pin 5. Also, with the yoke disconnected and the coupling cap jumpered, do you get a fairly low resistance across the wires going to the flyback. Sorry if I may have repeated ideas but just thinking out loud.