There's a schmatic symbol in Sam's PhotoFacts # 2908 and 2753-1 (covering JVC TV sets av-2749s, av-2759s, and av-2779s) that I don't recall ever having seen before. It's NOT listed in the parts section so I have no original or replacement numbers for reference.
Here's my attempt to describe it for those without access to the PhotoFacts that I mentioned. It looks like a circle with a vertical line running through the middle. On the upper left half of the circle there's what appears to be a "black pie" section extending from a point in the middle of the circle with an angle from about 11 to 12 o'clock. It almost touches the circumference. On the lower right half of the circle there's a simular "black pie" section, with an angle from about 5 to 6 o'clock. There's no line where the two "pie sections" meet so it doesn't appear to be some sort of dual diode device. It also isn't a spark gap.
If anyone knows what it is, please let me know. I have researched electronic schematic symbols on the web and in books but have not found the symbol or what it represents.