CurtPalme.com Home Theater Forum

[Thor]

Hi Guys,

I'm playing around with my new 9500LC Ultra, and wanted to see the image quality on this beast, although it's not going up on my HT room ceiling before in a couple of months.

So I have placed in on a table and done mechanical setup on it, and done a coarse green geometry on it, so that's fine. But the red and blue crosshatch look like crap on green, and even though I can set it right by the convergence, I feel I have to push it too far to do it.

Especially the red looks funny, I have never had these problems on my Barcos. Do I have to get my hands on the scan yokes or any thing else dangerous?

When I turn down the contrast and look directly into the lenses, they all line up beautifully, and looks very much the same, but not on the screen?

Any ideas?

[Person99]

Red and blue deflection coils need to be tweaked.

[ecrabb]

Welcome to the world of LC and stepless Schempflug! It's a lot more complicated than an AC machine. I assume the Barcos you came from were AC.

Assuming your mechanical alignment is right on, that's about what a beginning mechanical setup should look like. The blue and green will always have a bunch of distortion and lack of horizontal focus the green won't have. Looks like you need to level the deflection yokes and then work on scheimpflug. Red looks way out, and I can't tell on blue. Once you have both of those done, then you can start working on geometry. You also need to make sure you've centered both rasters on the tube face.

Did you use string on the screen to find vertical and horizontal? Find the centers of your screen frame and tape a piece of string right on the screen between the centers. That will give you a nice level horizontal reference to align the rasters and also show you exactly where screen center is. If you're not comfortable getting inside and adjusting deflection yokes, I'd highly recommend you pick up Graham's setup DVD - it goes through everything from mechanical alignment, to optical focus and scheimpflug (flapping), to yoke adjustment and electromagnetic focus. It's worth every penny.

I'm not an ehome guy, and you probably already know this, but make sure you remove all zone adjustments before you start trying to do geometry.

It's a very iterative process to set the more complicated machines up. You have to go in circles a few times to optimize each adjustment.

SC

[Nashou66]

First you should do a re initialization of the set. now look into the lenses before you do any convergence , if the grids are not fairly straight on all tubes then you will need to align them by adjusting the focus coil and or the scan yoke. Once the grid is level to the horizon use the internal mechanical set up guide for a rough set up. then tweek your heart out cause marquees love it!

Athanasios

[stefuel]

Someone just tell him how to get into the convergence menu and follow the on screen instructions

[Curt Palme]

No, what you need to do assuming that you did start from scratch is use the interpolated geometry and convergence menus. Start with the green, and the interpolated geometry menu is in the 'service' menu in the convergence menu at the bottom. Password is 0901.

Go through it twice so you get the gist of what you're doing with it, get the geometry close to perfect, then do the same in the convergence menu for the R and B tubes.

[Curt Palme]

No, what you need to do assuming that you did start from scratch is use the interpolated geometry and convergence menus. Start with the green, and the interpolated geometry menu is in the 'service' menu in the convergence menu at the bottom. Password is 0901.

Go through it twice so you get the gist of what you're doing with it, get the geometry close to perfect, then do the same in the convergence menu for the R and B tubes.

[stefuel]

Thank you Curt. I think that's what I was trying to say. I just couldn't remember tha E-home terminology. I mean wadda you expect. I'm just a dumb-ass AmPro guy.

[Gino]

Before you do what Curt says, be sure to level your scan yokes and to also adjust your horizontal size width slugs on the HDM first, especially on red (your vertical sizes look just about right but adjustment for this is done in the service menu). This way when you do interpolated then guided convergence, the circuits will not be driven so hard.

[Thor]

Thanks,

Yes I come from AC Barcos, so this is new to me.

I do in fact have Grahams DVD, and that's what freaked me out, he didn't have to do much tweaking to align the rasters over each other on the 1292 He just did lens toe, and just played with the deflections yoke, to show us how it worked??

The first thing I did to the projector was to reset it and delete all memory in it, so it should be from scratch.

What I don't like is the trapezoid image I get from red, where the blue is more square on the screen.

I spend a lot of time making sure that the raster is centered on each screen, and that the vertical hight is the same. And as said, the size and lines match each other, looking through the lenses.

Are the deflection yokes only attach with glue, and no screws, so I have to glue it back on when done? (this part scares me a little )

The green horizontal line is straight on the screen, I made that sure on "mechanical guide setup", by measuring the distance from screen bottom to the center line. And the whole projector is square to the screen.

I tried working the scheimpflug on red lens, but it didn't do anything to the geometry of red, just the focus.

The interpolated convergence, is that a kind of geometry setting also? Is it okay to have to tweak interpolated, some more that you would on normal convergence?

I don't know if this is normal, but when I reset the PJ, the red and blue electronic focus went bad. The green stayed focused fine on "50", but R and B did I have to turn down to about "21" and "30", to focus again?

Sorry for all the questions, but I just need to understand what I'm working with here. Or would somebody swap this for something I know, say a Cine9?

[fireanimal]

Here is a good guide to follow for an entire setup.

[stefuel]

I wouldn't get too fussy with it until it's hanging in it's final configuration. For now, he said he just wanted to see how it looks. A bunch of time spent doing stig, flare and yoke adjustments will have to be done all over again when he hangs it and starts from scratch again.

[fireanimal]

Practice makes perfect, the more he does it now, that better it will be when it is hanging from the ceiling

[Nashou66]

One way i do the initial set up is to do the convergence of the grids before any other geometry, then i do the keystone, linearity, and size. Then i go back and do convergence again. Doing it this way I found also helps reduce banding and i hardly need to use bow.

Athanasios

[draganm]

[Thor]

I pulled the sides of the PJ and took a look at the bellows. They all have a little moisture on them, like condense, is this normal?

[PaulB]

[Thor]

Thanks Paul,

Okay, then I can relax again. I spend a half an hour yesterday to look for leaks, when I saw this moisture, but no sign of any leaks anywhere.

I was planning to vent it anyhow, when I get it ceiling mounted later.

[Thor]

Hi,

Well, it's finally hanging on the HT room ceiling now, and I got my screen up hanging yesterday too, so it was time to see how it worked.

I have since the first posts here pulled the PJ apart and cleaned all, changed glycol on all three, got a red C-element and changed out the regular HD-10's with GT-17.

But! I now have a problem with green geometry. The right side of the image is fine and I can adjust it with the normal keystone, pin and so on. But the left side is screwed up, no matter how much I use the normal control I can get it to be right. I can get it better by using excessive amount of skew, but it still looks wrong?

The PJ is 100% aligned with the screen, and all mechanical setup is done. I have tilted the back of the the PJ about 4 millimeters up to get the image a little down, but that shouldn't affect the image this way?

I did not have this problem with the first "floor" setup.

I'm on work now, so I will post some pictures when I get home, then it's easier for you to get the idea.

[Chuchuf]

Once you have the right side adjusted using the geometry controls, go into convergence, service, 0901, Green Random, and use that to adjust out the lest side.

Terry

[Thor]