Can't get full image size

[CanadianZ]

Hello,

I have a Sharp XV-Z3100 and am having trouble getting it to display the full screen size. I have the lens set 12' back from my screen which should allow a 105"-122" screen size depending on zoom level. The problem is with full zoom the largest screen size I can get is 105".

I currently have a satellite receiver hooked up via hdmi and outputing 1080i. I have also tried outputing 720p and hooking it up via component cables. I have also tried zoom and stretch features on the receiver. Also, the blue screen shown when on an unused input is 105".

I can see a faint glow of pixels outside the displayed area that appear to match the 122" screen size I should be getting with full zoom. I just can't get the displayed area to go out that far. I have read the manual cover to cover a few times and gone through every setting I can think of on the projector itself.

Do you have any ideas or suggestions of things I could try?? I am out of ideas.

THanks, Tony

 

[jostenmeat]

Curiously, the pic itself isn't distorted, no "fat faces" or anything like that, right? Because the first thing I think of is AR settings in the PJ. But then really, my real guess is that you're simply limited by the PJ's zoom. I would contact Sharp directly, if I were you, trying my best to find someone who actually knows a thing or two about their PJs. DLPs are renowned for extremely* limited PJ placement (in regards to desired screen placement and size, of course).

How do you know 122" should be allowed? The manual itself says so? Again, I'd try contacting Sharp.

My friend had an issue with a new JVC he had for a while but just recently fired up. To his happy surprise, the nearest repair center was within driving distance. You never know I guess.

 

[Grador]

With your comment about seeing faint pixels around the side I take it you are worried something is wrong with the DLP? This can be tested by comparing an image from a dvd or bluray to a screen you know is working. Just stop at the same time on the projector and other screen and see if you notice the sides missing.

 

[CanadianZ]

jostenmeat - No fat faces or distortion. I know the projector should be at least as big as I suggest as I check the projector calc. at Projector Central. Also, the manual says 100" from 9'11" (full zoom) to 11'6" (no zoom). I am at full zoom and 12' to attain a 105" screen. Yes zoom is limited with DLP it is only a 1-1.15x zoom.

Grador - I am not so much worried about the faint pixels and something wrong with the projector. They are faint because they are off. Its not just the sides missing the entire image is surrounded equally.

It is especially noticeable when there is a black screen in between commercials or shows and the entire ~122" is uniformly black. (or faintly lit)

I tested a LG st600 smart tv upgrader and it gives the same 105" screen size.

I would like to exhaust all ideas before I move the projector mount back.

Thanks again, Tony

 

[jostenmeat]

jostenmeat - No fat faces or distortion. I know the projector should be at least as big as I suggest as I check the projector calc. at Projector Central.

Their calc is a rough guide, and is known to be inaccurate at the extremes. It's to get a ballpark idea of where the sweetspot should be. Unless things have changed (I doubt it), you are advised to stay away from the extremes if you want the best PQ, it doesn't matter which extreme. I don't understand the mechanical or physical reasons behind this advice, but this is what I have read regarding all the techs of PJ, LCD, LCOS, DLP, etc.

Also, the manual says 100" from 9'11" (full zoom) to 11'6" (no zoom). I am at full zoom and 12' to attain a 105" screen. Yes zoom is limited with DLP it is only a 1-1.15x zoom.

I'm not the brightest crayon in the box, so tell me if I'm wrong here: Those numbers don't quite add up (??), and you're trying to push the max angle by more than 2/3 of a degree, compared to the full zoom max number you're giving me.

I would like to exhaust all ideas before I move the projector mount back.

I would not consider that all ideas are exhausted until you contact the mftr. I have contacted the mftr's of enough of my AV items that I have lost count. They include mftrs for my processor, cdp, bdp I think, definitely UPS, amplifier, and this is just off the top of my head. Oh yeah, speakers too, and more than one brand there.

 

[CanadianZ]

I know the calc is a rough guide. I wanted about a 110" screen or so. But might have gone bigger or smaller. At the distance I put it I could go 105-122".

The numbers come straight from the manual as far as screen size goes. They do not give every screen size. 100" 150" 200". I just picked the closest one to my screen to give an example in my post.

I am going to try contacting the manufacturer and see if they have any idea..

Thanks,

Tony

 

[CanadianZ]

I figured out what the problem was.

I have a feature on my projector that is similar to keystone correction called "geometric adjustment". If you place the projector way off center you can correct the image by moving 4 corner arrows to the corner of the screen. The projector scales and corrects the image. This cannot be reset or adjusted without the remote control (which I conveniently didn't have) I bought a Harmony and was able to make the adjustments.

Thanks to everyone for their help.

Tony