well screwed this tv up again. I hear vertical running and I have 10kv at picture tube anode cap but no picture. I mayhave accidentially had meter in amps instead of volts when measuring across focus coil but not sure because negative meter lead wasnt plugged in. Anyway Now I have zero picture. So hoping I didnt permanently fry something making this tv a parts set. I do not know where to look now.
Going to guess the video section is dead, other than that maybe check for voltages. I already checked both fuses and since everythings lighting up probably not fuses anyway.
UPDATE:Im a moron! while tilting the chassis on its side to work on the focus and try a new vertical output transformer, I had bumped the ion trap! Now back to the focus issue. Focus knob when rotated almost fully clockwise is when focus comes in at roughly 80 volts across focus coil, so I need to figure out how to be able to increase focus voltage. Turning focus knob counterclockwise, the voltage drops and I can make the focus go way out of focus. 2200 ohm resistor connect to vertical out put transformer is 200 ohms higher. I need to get more voltage to the focus coil somehow. 87 volts is the max the focus knob will put on focus coil rotated fully clockwise! low voltage power supply is at 128volts and supposedd to be at 160 but focus coil runs off of high voltage so I dont know there.
Would a higher resistance in the high voltage 8500 ohm resistor make the circuit draw less current therefor throwing off the focus? Havnt tested yet but there are actually 2 purple dots that appear on the resistor when I turn it on. Resistor in question is r444 on the cathode of the 6w4 tube. Also the main transformer is making a funny noise but I cannot tell if its normal or not. I should try swapping rectifiers and the power audio tube as well.
