CurtPalme.com Home Theater Forum

rod · Posted: Thu Nov 29, 2007 2:42 am Post subject: Troubles adjusting to screen size

I'm repositioning my Barco 1208 now that I have all my toys in hand. I am trying to push a 1080P signal but have issues setting up PJ. I understand the 1080P is an issue for 1208 Port 3 but the image is stunning.

The biggest issue is getting the image to fill the screen. I am now at end of adj. with H-Size and still can't fill the screen. The weird thing about it is I moved by pj ahead ~8" ahead when I mounted HD145s replacing HD8s. so then I push it back 2" from my original position and still had the problem.

Also the image is not centered. When shifting H-Phase left to center it I begin to lose the left side of the image. What is causing this to occur?

Another thing I notice is when shifting to extremes at some point the image grows dimmer.

I have also noticed that the left side of the image seems more condensed than the right side. I display an image on the DVE disc that has the circle with the graduated crosshairs on it. This is supposed to be symetrical.

What are the possibilties for causing these issues? Might the issues go away if I try Port 5? I have ordered the adapter for the HD-Fury for P5 anyway.

Joust · Posted: Thu Nov 29, 2007 3:06 am Post subject:

is your raster maximized on the tube face?
i think you really should maximize the rasters then move the PJ to fill the screen.

rod · Posted: Thu Nov 29, 2007 3:11 am Post subject:

yeah rasters are pretty much filling the tube face. maybe a bit of room. how do you increase raster size.

As I said I'm only 2" closer to screen that the HD8s. My intention is too definitely move it further back from screen but it's not making sense that I hav to do this. That's why I posted.

I'll still have the distorted image on the left side though.

Joust · Posted: Thu Nov 29, 2007 3:32 am Post subject:

if the raster is close then that is fine. you just want to avoid making it excessively small to accomodate for an improper PJ placement. this could also account for dimming of the picture if the raster is too small. but this sounds like its not your problem.

Is your Scheimflug adjusted out? this could account for edge distortion. or at least loss of focus.

I don't know whats wrong. If you move the PJ back the picture will get larger. the trick will be, if it can still be focused.

rod · Posted: Thu Nov 29, 2007 3:38 am Post subject:

I can check the scheimflug. I supposed it can have some effect but everytime I try to adjust I end up screwing it up so bad it take forever to recover it. I don't think it would cause the distortion. I thought Sch. was for corner focus.

I don't want to think about your last point right now. knock it off with the negative waves - for now Wink

thanks for the suggestions.

rod · Posted: Thu Nov 29, 2007 3:39 am Post subject:

I'm going to try to reset everything to mid point and attempt again. maybe I did something in the setp. wouldn't be first time.

Joust · Posted: Thu Nov 29, 2007 3:43 am Post subject:

take a picture of the front of your PJ with and without the lenses.

I use calipers to measure the front of the tube mount to the front of the tube face glass to ensure Sheimflung is adjusted to null.

rod · Posted: Sat Mar 08, 2008 4:57 pm Post subject:

I can't believe it's being since Nov since this last post.

OK! enough is enough already.

I'm getting ready to do some work on the PJ as I am taking most of next week off. Everyone from family is banned from making any contact with me unless bleeding at the jugular (that's ME bleeding BTW).

Barry, what specifically were you looking for to make sure I shoot the right pics?

Rod

Joust · Posted: Sat Mar 08, 2008 5:30 pm Post subject:

whats your goal?
sounds like, from your posts, you have a picture you are satisfied with.

If your goal is to get your picture to fill the screen, there here is what I'd do.

turn down brightness (so you can stare into the lenses)
Take off the lenses.
adjust raster size to use as much of the tube face as you like it. (this is the thing that throws the monkey wrench into all the throw calcs)
put the lenses back on.
move projector until you get the image size you want.
focus.

Now that you have moved your PJ...
you will have to redo mechanical aiming, geometry and convergence of course.

I wouldn't reset everything. you will lose your channels and colour settings. I see no need for that.

rod · Posted: Sat Mar 08, 2008 5:55 pm Post subject:

I like the picture except I'm cropping it a lot. If I move the PJ too close I run out of adjustment room in the h-phase also when shifting the pic goes really dark and I have to bring it back to get the light levels back to normal. I'll ensure rasters are increased to max size and move pj as suggested.
A few questions before getting started.

1. how to adjust the raster size?
2. when doing the setup, what's the difference between a)selected source, b)genlocked pattern?

**AnalogRocks**

rod · Posted: Sat Mar 08, 2008 7:54 pm Post subject:

thanks, well I guess I can shift the image over with my DVDO.

I echo your sentiment "Geeze you fix one thing.....". I'm just going to reset the whole f'ng system right down to phsycial setp, kill the power at the house level Wink

, count to 10.

Hopefully someone chimes in to tell me where to adjust the master raster sizes and position. they are definitely off and should help if I adjust them correctly.

rod · Posted: Sat Mar 08, 2008 7:59 pm Post subject:

One other question? do I need the steel pieces that were bewteen the lenses and the pj mount. what is their function anyway?