I am not sure what exact part fixed the rising horizontal output tube current but a combination of the following let me run the TV for 30 min, after which I turned it off. Here is what I fixed:
- Replaced all of the parts from the horizontal osc. plate to the horizontal output grid
- Replaced the horizontal osc tube with a NOS tested tube
- Replaced the boost rectifier and C119 capacitor which brought up the 1000v boost to a measured 1020 volts, thank you Zeno, I did use a NOS ECG 119 selenium rectifier
- Replaced the horizontal AFC diodes
- Replaced the remaining film capacitors located on the bottom chassis, note I still need to go through the other circuits
One remaining concern - the horizontal sweep circuit adjustment recommended adjusting the horizontal efficiency coil to keep the horizontal output tube current under 225ma. When adjusting the horizonal hold to get a stable picture the horizontal output tube current ran at 240ma. Are there other settings or other parts to check so I can bring the current down. I suspect the horizontal output tube and flyback transformer will not like running hot long term.
NES source, playing Legend of Zelda:
12-26-2020, 10:06 PM
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