Zenith 5311U / 24MC32 restoration

[Kevin Kuehn]

Originally Posted by bandersen

Thanks for the tip. I dug out this Zenith service manual I've been lugging around since the 80s and found the schematic. Crazy that I've had it for decades and finally have a use for it!

Not sure which is the efficiency coil. Where does it connect in the circuit?

https://flic.kr/p/Sd19Bu

Usually in the plate circuit of the damper tube, but I don't think your chassis has the adjustable coil. I have the same Goodman book and they don't show it on the schematic. If you look at the schematics prior to this chassis they have the coil labeled as such.

[old_coot88]

On Zeniths of this vintage that I've seen, the eff. coil is usually mounted in one of those holes in the rear chassis apron, on the far right end. It's 'snap-in' mounted from inside the apron, with the end of the form protruding out. The slug is adjustable from outside with a 'diddle stick' tool. If this set doesn't have one, I'll hafta add this to my "learn something new every day" list.

On some makes of color TVs the eff. coil is labeled "linearity coil"

[EdKozk2]

Bob, Glad to see you got that set. I bid on it the first time it was auctioned. Seems the previous winning bidder didn't notice the words ' Local Pickup Only ".
I ended up buying a color roundie in Michigan that week. I used to watch BOZO at a friend's house on a 1964 Zenith Roundie.

[zeno]

Very nice set. Will have an almost unbeatable pix in
a dark room with early content such as Bonanza. I
had one in my bedroom (12X10' !) in the early 70's and
would watch things that sucked just for the realistic color.
Fun to work on too ! You do have to watch the H. eff coil
or you will be buying expensive H outs.......

73 Zeno
LFOD !