[codefox1]

OK I see 5 section candohm on schematic, and as suspected creates negative bias supply with respect to ground if properly wired and part is good. Some Zenith power supplies and voltage dividers are quite tricky. Has been my rule that if one section of candohm is bad, cut it out, mount a terminal strip, get appropriate discrete resistors and dress them against chassis to disperse heat, fuse the set, and of course replace electrolytics and all paper caps.

Since there is a voltage chart, a quick check of the audio section should reveal any major flaws. Beware that modern meters do not load down circuits, so higher readings are likely in many cases.