CurtPalme.com Home Theater Forum

[Satanier]

I nulled my static convergence, I have some video running, things are very bad right now, the geometry is uneven on the top and bottom, it wasnt like this before! Also, my crosshair is seriously messed up...

I defaulted the rasters to their default setting for centering, they look pretty centered to me.

Pictures:::

[Elaine Benes]

[Elaine Benes]

Those pictures are completely normal, stop panicking.

Keep in mind you're trying to set it up correctly, and you're working from the center OUT.

Get the center correct, then worry about the rest of it, it will come in VERY EASILY when done correctly, really...

Remember, even though STATIC convergence does essentially the same thing as Raster Centering, you need to center your rasters with the correct controls or you'll suffer drift and risk burning out that C Drive....

So you've got your STATIC convergence zero'd, have you centered your rasters in relation to the tubefaces ?

Your image will look even worse when you've done that, BTW...

[Satanier]

[Elaine Benes]

[Elaine Benes]

If your rasters are centered on the tube faces, good, you can tweak the red and blue raster centering in the VERTICAL plane ONLY to match as exactly as possible the green. Doing this will allow you to use virtually no STATIC convergence, which is a good thing...

[Satanier]

Ok I changed the rasters a bit to try to make them as centered as possible on the tube faces, what about the size of them? should I leave that as is?


If so, then I toe in the blue and red to the green, and then use vertical raster adjustment on the red and blue tubes to align the center of the crosshair, combined with the toe in for the left and right align?

[Elaine Benes]

Don't worry about size right now. We only need to start with the first things first right now....

Yes, get all three rasters as perfectly centered on the tubeface as possible. Obviously, be much more exacting with green as it is your reference....

Yes, when you have green perfectly centered, it is ok to match blue and red in the vertical plane to the green. If blue and red aren't perfectly matched to green in size, IGNORE THAT, and simply match the vertical centers of red and blue to green.

AFTER you do the vertical, yes, toe in red and blue to perfectly match green in the horizontal plane ie. side to side, but only worry about doing this at the center.

By doing this, what you will accomplish is perfect center convergence, or STATIC convergence, without ANY electronic correction.

Now, since NEC's are capable of such narrow beam's, it *can* be possible that you *might* have to use a very few clicks of fine STATIC convergence adjustment after you've done the basic raster centering/toe in...but lets get the basics done first...

[Satanier]

OK, I centered the rasters on the tube faces as best I could, then I used toe in on red and blue to align the vertical line of crosshair, then I used raster centering up and down on the blue and red tubes to align the crosshair fully. Is this correct so far?

[Elaine Benes]

That looks good.

You could be a tiny bit more exacting on the blue toe in, get it really exactly on top of green, but yes, that looks right.

Now you can hit Adjust, choose Convergence, then Phase.

Be prepared, when you do that, it will "whang" the image all out of whack and distorted, THIS IS NORMAL and its SUPPOSED to happen...

After the whacked out test pattern comes up, look at where the box is in relation to the edges of the test pattern right to left, adjust it till the box is in the center, left to right, AND then the bump is perfectly dissected by the centerline. Let me know when you're done this. Make sure when you're done this, you save it upon exit.

When you've done this, and exited, bring up your cross hair pattern again, I'll bet it now has equal length arms on either side of center...

[Satanier]

Ok, I tweaked the blue toe in slightly and then adjusted the phase, does this look correct?





And the crosshair now:

[Elaine Benes]

Absolutely.

I told you you'd get it, see, its not difficult, just specifically defined....

So, now run some video and use your "POSITION" and then "SHIFT" to center the image roughly...

When you've done that, we'll handle the Convergence in a few minutes flat, really, without using hardly any point convergence at all....

As an aside though, if this were a "final" setup, you'd do Astig, then Electronic focus BEFORE doing any Convergence setup, but for now, we'll skip that so you can go through the hard part IN ORDER once so you see HOW it all fits together...

Center out, that's the mantra....

[Satanier]

[Elaine Benes]

[Satanier]

Ok, I have adjusted my position shift to center my image roughly on screen.


Image:

[Satanier]

And here is the rough grid test pattern, it's normal for it to be so off in certain parts?

[Elaine Benes]

Good, so now you do Convergence.

With Convergence, you do the adjustments in "pairs" basically....

I should state, my *personal* preference is to get Alignment just roughed in to start, ie. I make the image roughly the shape I want using the Alignment controls, then go back AFTER convergence is complete and do my fine Alignment to make my picture shape as exact as makes me happy...

Make sure what you've done so far is saved.

Bring up your Cross-Coarse grid.

Hit your Adjust button, choose Convergence, go immediately to Tilt/Skew make sure you are adjusting RED, turn off blue so you can see your adjustments easier....
Using Tilt/Skew, look ONLY at the areas top and bottom that I circled in earlier picture, adjust Tilt/Skew so there is an EVEN amount of red on ONE side of the green line TOP AND BOTTOM, then adjust that even amount out using BOW.

Do the same for the horizontal plane, again, ONLY look at the circled areas. Do the same for blue. Let me know how it goes...

[Elaine Benes]

[Satanier]

[Elaine Benes]