ฝัง
- เผยแพร่เมื่อ 31 มี.ค. 2024
- The oscilloscope test was done using the dud picture tube which I don’t think had any bearing on my test results compared to testing it with the actual Hotpoint Picture Tube. It’s possible that there’s a hairline crack in a PC board but right now I’m leaning towards degraded phosphor.
Bummer Ken. I wish I could offer some thoughts on how to progress but I know nothing about TV circuits. I'm sure something will pop into your head though. Good idea to start on something else
Is it the korrekt transformer ? Somebody may have had to change it and didn't get the korrekt model.
I don't really buy the idea that the phosphor has gone bad... The whole surface ?
But one way to find out is to hold an old clock with phosphor in front of the tube and see if it lights up.
Perhaps, but I think the vertical, horizontal power transformer/flyback and the deflection yoke are all original, although the flyback and yoke passed the ringer tests I’m thinking that there still could be the possibility that one of them respond differently under load and even after a spot on voltage tests prior to installing the chassis back in the cabinet. I need to purchase a ringer that will test said items in circuit under load. I’ve never seen a picture tube go completely dead as far as degraded/deteriorated phosphor. Years ago I’ve only read about such things and I think it’s possible. I’ll try you idea with the phosphorus clock or watch for that matter. The TV is still on the back burner in the event I do acquire a dedicated in circuit ringer tester.
I disagree about this TV being low hour set though. Thanks for watching and your input.