CurtPalme.com Home Theater Forum

[akajester]

ok, thanks everyone. I did alot of reading and learned more about rasters and the barco adjustments. I think I have another late night of tweaking to look forward to! I'll come back soon with some answers. Thanks!

[akajester]

Guys, I did a quick look at the rasters and they appear to be wider than the tube faces, at least I can't see the sides of the rasters. They look like this;



Would the master width adjustment help this? What should I adjust? Thanks!

-akajester

[Ile]

[akajester]

Ok, I ended up adjusting the master width to bring the raster in a little so it wasn't over the edge. I centered the rasters with the pots. I did the toe-in and checked the vpos pots too. everything looked great. However, when I gave it a signal and pattern the red was very close to the green, but the blue was shifted 3 inches to the left! How can that be?

I adjusted the blue toe-in to try to correct it but the problem was the same in the end. The blue left edge was too far left. It's like it doesn't matter what I adjust, it always ends up the same. Is something defective?

Thanks for looking!

[akajester]

So, for my own benefit I'm going to try and recap what I've done to try to fix this.

I've stepped through the physical setup again. The rasters are set to the correct width and centered. I made sure the blue yoke was pushed against the tube bell. I did feel it move a little, but not much. All menu settings were set to midpoints and all adjustments were done mechanically. Toe-in is set right. Linearity looks good. Deflection yokes are good. I did make some adjustments to that which helped the red converge a little easier.

When I feed the projector a 1080p pattern over port 5, the blue is off, inches to the left. I can either fix this with raster shift, toe-in, it doesn't matter. I always end up with a blue line on the left side.

Do the different crt's have different resolving characteristics? If all the mechanical stuff is setup right, does it make sense that the blue and red would be off when you send it a signal? Is this something I can fix on the htpc with powerstrip timings? I already cranked the porch settings up to get the video centered, instead of using the hphase adjustments.

thanks for listening. I'm trying to write this down in hopes that some inspiration comes my way. Thanks everyone!

-akajester

[akajester]

Reading through the Guy Kuo focus and aim procedure. wow. I need to do this all over.

[akajester]

Ok, so after reading Mr. Kuo's focus and aim procedure... also read other references about how the left side raster isn't fully initialized. I'll try to describe as best I can how I fixed this.

The first thing I did was widen the raster using the master width pot, so the raster is wider than the tube face. I fed the projector a 1080p gray window pattern from my htpc to center the image on the tube face. I used powerstrip to increase the porches to slide the image to the right, as it was way left off the tube face. I also used the hphase adjustment, as I could only go so far with powerstrip. This created a large gap between the raster edge and the displayed image, increasing it's chance to stabilize properly. I put up a test pattern and adjusted the vertical placement for red and blue to match the green. I adjusted the toe-in to match the green. I noticed the blue horizontal linearity was off, probably because I messed with it a few days ago. So, I used that and the toe-in to get it aligned as best as possible. Avoiding the use of the internal patterns to do the toe-in was critical!

Then I went on to the convergence. I made sure not to shift the raster left/right with the menu's, only vertical. All left/right adjustments were done either with hphase, toe-in or powerstrip. After the convergence the blue issue was 95% gone! Sweet!

I learned alot. Thanks everyone for the help! I hope this helps someone else!