I remember trying to fix this for a long time and not getting anywhere
:
some information: the original diodes were bad, I used 1N4007's as replacements. Originally it calls for 140mfd filters, I used 100s. But I tried putting 47mfd caps in parallel with the 100s, and it made no difference, so I went back to just the 100s. According to the schematic the other side of the secondary coil should go to a 200mfd capacitor which connects to ground, I don't remember what I had there. According to the schematic, that large dropping resistor (which if I remember is really 2 in series), should read 300 ohms, my notations say it actually reads 200. There should be one filter on each side of that resistor. After that resistor it should read 275 v, according to my notes it reads 225v. There should also be another branch of the power supply which branches off before that resistor, goes through a 2k resistor instead and then has a 20 mfd filter, according to the schematic this should read 200v after the resistor.
And that's exactly what I kept doing, trying to remove that resistor to get the voltage up, then it lets too much AC in and it upsets the vertical sync. Same with a lower value resistor. I thought about trying a choke coil instead but never got around to it.
Odd facts about the power transformer: according to my notes here the secondary coil should read 5 ohms across, and it actually reads 1.2. And it says the primary should be 1.7 and it is really 1.
And becuase the voltages are low, I couldn't get enough vertical height, so I reduced the resistor comming off the center tap of the vert height control from 1meg to 470k.
I'll scan this on Friday and then you can see it all.