Quote:
Originally Posted by Crist Rigott
OK, I'm confused. There doesn't appear to be a focus coil used in this TV.
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That's because it's intended to use an electrostatic focused CRT. Which is nothing more than a DC voltage that connects to the CRT's focus pin. I think on a 17HP4 it's G4, but I can't make it out on your schematic.
https://frank.pocnet.net/sheets/127/1/17HP4.pdf