CurtPalme.com Home Theater Forum

atotaldoofus · Joined: 22 Jun 2009 Posts: 66

Hi again, thanks for reading!

My projector is a Sony 1272Q!

I've gotten all three CRT's aligned in the center, so that the middle of a crosshatch will be white.

I've adjusted the yokes of the red and blue tubes, splitting the difference between horizontal and vertical divergences, so that I'll have the minimum amount of electronic adjustment.

However, after setting up my green tube to project a nice crosshatch pattern evenly on my screen, I started running into trouble with the red:

Although the centers are all converged, the overall red crosshatch is both lower and further right than the green.

Despite cycling through the registration settings three times (SKEW, LIN, BOW, etc.) with the intention of minimizing overall divergence, and then finally going ahead with the 11 ZONE controls, I still cannot get the red crosshatch to completely align with the green in the central portions of all four sides; in every instance, red "bends" away from green, precisely in those spots not covered by the 11 ZONE controls.

What should I do at this point? Where did I goof up?

Thanks for reading! Bye!

atotaldoofus · Joined: 22 Jun 2009 Posts: 66

Just in case I didn't state the problem very well, let me put it another way:

I have aligned the very center of the crosshatch in all three CRT's, when projected on the screen. However, even with their center aligned, and with the registration controls tweaked to make all the lines of the crosshatch display relatively evenly in each, the red CRT obviously displays an off-center square: all four sides of this square are offset from those of green.

So I face a dilemma in that if I use ZONE 1 to make the red squares of the crosshatch more evenly align over the green, the center portions will no longer be aligned.
Simply changing red's SIZE wouldn't do it either, since it's no bigger than green is, but just uneven.

**Curt Palme** · Posted: Mon Sep 14, 2009 3:34 pm Post subject:

Can you post a pix of the crosshatch of the red and green?

PaulB · Posted: Mon Sep 14, 2009 3:36 pm Post subject:

Hmm, is this link useful to you?

http://www.avsforum.com/avs-vb/showthread.php?t=965287&highlight=1272q

**Curt Palme** · Posted: Mon Sep 14, 2009 3:40 pm Post subject:

No.

I didn't read all of that, but I want to see a screen shot of both the crosshair and crosshatch patterns of the G and R tubes turned on. That will tell me lots.

atotaldoofus · Joined: 22 Jun 2009 Posts: 66

Hi, thanks for the response. Unfortunately I don't own any kind of camera. I'll see about borrowing one though.

If I can get one today, then tonight I'll reset to 128 all of red's ZONE tweaks so you can see what it's like before correction is attempted.

But basically, it's like there's the overall square of green in the center, and then the overall square of red offset just a bit below and to the right, forming its own distinct square - and yet the center points and in fact almost the whole of the central vertical line are aligned fairly well. If I switch rapidly between the green, red and combined (yellow) display of a crosshatch pattern, the "cross" in the center of the screen does not shift visibly at all.

PaulB · Posted: Mon Sep 14, 2009 3:52 pm Post subject:

Sorry Curt, that wasn't meant for you, I wouldn't dare Shocked

I'm thinking that his mechanical/electrical setup may not be quite right, just trying to eliminate the obvious just in case!

Also found this excellent thread about setting up a 1271 but procedure should be virtually identical http://archive.avsforum.com/avs-vb/showthread.php?s=&threadid=403176&highlight=Brian+Hampton

**Curt Palme** · Posted: Mon Sep 14, 2009 3:55 pm Post subject:

I can add this:

If the center of the crosshatch/crosshair is aligned, that's good, that's where you should start. If the edges are out, then it's most likely the LIN control that is out of whack for the red.

Work from the middle outward. There should be no reason for the centerpoint to be out of whack to correct the edges. I would reset all zone controls to 128, including the green. Use Zone 1 to center the raster/test pattern on the green tube, then use Zone 1 on R and B only to overlap the centerpoint. The rest of the zone adjustments should only be used for fine tuning.

I have to say, the Sony manual is really well written, but if you jump around, you'll run into a lot of problems. Follow it step by step.

**Curt Palme** · Posted: Mon Sep 14, 2009 3:55 pm Post subject:

I can add this:

If the center of the crosshatch/crosshair is aligned, that's good, that's where you should start. If the edges are out, then it's most likely the LIN control that is out of whack for the red.

Work from the middle outward. There should be no reason for the centerpoint to be out of whack to correct the edges. I would reset all zone controls to 128, including the green. Use Zone 1 to center the raster/test pattern on the green tube, then use Zone 1 on R and B only to overlap the centerpoint. The rest of the zone adjustments should only be used for fine tuning.

I have to say, the Sony manual is really well written, but if you jump around, you'll run into a lot of problems. Follow it step by step.

atotaldoofus · Joined: 22 Jun 2009 Posts: 66

Thanks Curt! I'll reset the settings and run through it again as you suggest, paying particular attention to red LIN.

atotaldoofus · Joined: 22 Jun 2009 Posts: 66

It was LIN. Razz

Sorry! Thanks again for your help!

Now I've finally got my projector in a watchable state! There's still one lingering glitch, but I'll experiment a little before I start another thread about it.