Hey y'all. I don't know if any of the VK'ers visit ARF but I need some help with this thing and the TV section there seems to be sparse. I don't like the idea of sending y'all to another site but here's the link to my thread:
http://www.antiqueradios.com/forums/...p?f=3&t=231875
General gist of it,
This is the first TV I baught, rouphly when I was 15 ('07-'08). I fiddled with it some and got it to show a good picture for about 5-6minutes. Then it would lose Horizontal hold and would be unable to get it back because of being very finicky. I knew nothing of recapping old radio's and TV's at the time and wouldn't have anyway's if I did know of it.
Fast forward to this year and I want to see this basterd that's been sitting on my dresser working, and I want it to be stable for
much more than 6min's.
I finally recapped it this last week, and it was a bitch. It's got a metal plate that block's the back side of the pcb and it is soldered in several spots. I couldn't get it apart so I had to unsolder some wires and junk to get the board to pivot enouph to get it all apart and start work. Anyway's I replaced all paper caps and lytic's and got the chassis all back together along with the CRT back in place. I did not replace the selenuim rectifier's. I have 1N4007 diodes but I know nothing of figuring out the correct resistor values to use with the diode's.
Here's the results:
It has a pretty good pic... but it now has screen interfearance, Looks like snow. You can see the full image, but the screen has dots all over it, that mimics snow but when switched to a channel that has nothing, you can see the regular snowy pic with this same issue overlay'd on top of it.
I also noticed that a bar will go up the screen then re appear at the bottom and repeat. It's slightly lighter than the image and it doesn't disturb the image. Mabey something off sync? It never had it before.
Also noticed that verticle hold isn't as good as it used to be. As it's warming up the picture will either roll up or down. I don't know if it was set up to operate better on some of them out of spec caps or if a tube is giving up. Once it's warmer it got more stable but if ya made any adjustment the picture would roll.
Would that little springy peice of metal above the CRT have anything to do with these issues? It's not touching the CRT and i've seen other sets that have something like that on them that are touching their crt. Ive also read somewhere (if im thinking correctly) that some televisions don't operate properly outside of their cases. Would that have anything to do with this?
Today, I also noticed that it's arcing? at the anode on the CRT. Solid purple glow and hiss. I'm not that surprised though, since the set has no HV cup that cover's it. Just the end of that spring like conducter and a piece of (electrical tape looking) thing wrapped around it. It was also real hot (95ish) and humid today and there is no temp control in the building that my workbench is in.
Anyway's here's a video I took today. In the vid I mess with the contrast, fine tuning and the vert. hold a little bit.
http://s467.photobucket.com/user/ZN0...e78da.mp4.html
Hopefully the vid works for you all. Any help and advise greatly appreciated!
Sorry for the long post, especially if it sent ya to some zzz's 