1959 Zenith D3004W-Space Commander 300

[ZackN920]

Hey y'all, where could I find a schematic for this set? It has the "Super H20 Chassis" in it. I dont know at the moment if there's a more specific chassis identification code or not, just let me know if there is and I'll see about pulling the tv out of the corner to have a look.
General gist is that the set seems to be developing issues, and I'd like to turn it into a daily driver. I also got to get it apart sometime to give the flyback some attention. Last time I took a peak at it, it looked like all the black coating fell off and was laying in a pile of chipped off pieces. (Mabey the reason it sounds like a burning cigarette with the back off)
I've got more I could add but I'm out of time