Josh128 wrote:ASDR wrote:Josh128 wrote:The 3 sets are probably convergence rings and the two separate are probably the purity rings. Neither will do anything for geometry / bowing. When you adjust them, how close they are together determines the intensity of the effect when you rotate the pair together. Did you find the H-STAT pot yet?
No, they should do
exactly what you're saying they don't:
https://www.youtube.com/watch?v=otwPa-nhcTg
btw, nobody else wanting to comment on the yoke clamp screw thing I asked? I'm really curious how y'all decide how tightly to tighten that clamp around the fragile neck without breaking anything.
Man, Ive never seen anything like that. My big 36" has that "center bowing" ever so slightly. Purity rings dont normally do that, convergence rings definitely dont do that. Its very hard to see which rings that is. Looks like the ones on the rear, Im guessing thats the purity rings. I'd be curious to see if it fucks up purity on full screen colors when you try that-- but Im really tempted to crack open the behemoth and give it a shot.
They're a separate pair of rings way in front of the six rings. Large Trinitrons have them. Y-Splitter or something like that was the name? Should be in the service manual? But they definitvely adjust bowing. Most TVs do not have a VCEN/VPIN setting so you have to adjust stuff like this.
Josh128 wrote:
As far as clamp tightness, it really only has to be tight enough to "grip" onto the neck. If you are looking for inch pounds of torque I have no idea, but you will be OK to tighten the screw until you feel the resistance of it tightening on the neck. Once you feel that tightness you can go about 1/2 turn more and that should be plenty good.
Ok, I was just hoping for something more scientific like you all use a torque wrench or something. I've never broken anything but it's always kind of a bad feeling, thinking I'm about to crack the neck of the tube.
Josh128 wrote:
For the side compression, use the horizontal S-Correction adjustment. SCOR maybe?
SLIN. There's like 3 TVs in the world that have that setting, though. I think when there's serious horizontal linearity issues your options seem to be 1. swap caps 2. buy other TV :/
Tempest_2084 wrote:
So as it stands now I have a few problems that I'd like to fix before closing this set up.
1. There's a blue shadow on the lower left side that I can't seem to fix with strips for some reason.
2. The top horizontal line has some convergence issues that go all the way across. I don't know if one of the pots on the yoke would fix this or not but I'm afraid of mucking up the convergence elsewhere.
3. The top boxes on the edges have a 'hook' on them that I can't seem to fix
4. The column of boxes second from the left side seem to be smaller than the ones near it. Is this something that's fixable? I think it's called linearity but all the controls on the SM are for vertical linearity.
5. Not sure if this is related to #4 or if it's just the uneven top, but while testing Metroid on my NES I noticed that the blocks across the top 'warped' a bit as I moved them off the screen to the left. If this is due to the crappy and uneven top line geometry would shrinking the horizontal size a bit fix that or just move the distortion further down the screen? I honestly wouldn't mind losing a quarter of an inch off each side if it fixed that distortion.
Well, you've done a good job, it looks way better than before. Hope you can relate a bit to the it's a PITA / nightmare post / guide I wrote.
- Forget about fixing convergence it the very corners, like the last 0.5cm of the screen. It's just not meant to be on consumer TVs IMHO. You'll rarely see it and fixing it will likely cause other, worse issues.
- The hook thing is something I tried to explain in my longer post. You might be able to fix some of this at the expense of the very corner area
- You have some pretty severe horizontal linearity issues at the left, there are likely no controls to adjust any of this and you'd be a madman trying to fix that with gluing magnets to the tube
- Make sure to test your screen with the scrolling grid test, it makes seeing certain issues way easier than any static test screen
- Really, just adjust those pots on the yoke. It's a 5min job and you'll at worst get it a little better