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What could be wrong with my Sony VPL-VW100 setup?

post #1 of 19
Thread Starter 
The setup is a Sony VPL-VW100 projector projecting on a Elite CineTension 100" screen. The problem is the images seem too dark unless I max out on contrast! The screen has a gain specification of 1.1. The projector is rated to be 800 lumens. The projector is set at about 14' from the screen. The projector was attempted to be calibrated by a well known ISF professional calibrator in our area - known as Mr. Bob in various internet forums.

Myself and Mr. Bob tried various menu options on the projector. We just couldn't get the image to be bright enough unless we maxed out on the contrast - which of course degrades the image quality considerably. Mr. Bob's opinion was that I should try a new screen - perhaps one from Stewart. I called up a local Stewart dealer, and he visited my HT to take a look. He thought changing the screen is not going to help much - I should get the projector checked, as the image is too dark for ANY screen gain factor.

So now I am confused what the problem could be. I do plan to call Sony and get the projector checked out. But do any of you see any obvious problem in throwing up a 100' image from a 800 lumens projector on a screen that is said to have a gain of 1.1? Is there any more detail about the setup that you need to know to comment on it? Appreciate any help.

On a side note, since the calibration, the image quality is superb when things are right (which I can achieve by reducing the image size to around 80" - something that we don't want to live with).
post #2 of 19
Quote:
Originally Posted by ssingh2 View Post

The setup is a Sony VPL-VW100 projector projecting on a Elite CineTension 100" screen. The problem is the images seem too dark unless I max out on contrast! The screen has a gain specification of 1.1. The projector is rated to be 800 lumens. The projector is set at about 14' from the screen. The projector was attempted to be calibrated by a well known ISF professional calibrator in our area - known as Mr. Bob in various internet forums.

Myself and Mr. Bob tried various menu options on the projector. We just couldn't get the image to be bright enough unless we maxed out on the contrast - which of course degrades the image quality considerably. Mr. Bob's opinion was that I should try a new screen - perhaps one from Stewart. I called up a local Stewart dealer, and he visited my HT to take a look. He thought changing the screen is not going to help much - I should get the projector checked, as the image is too dark for ANY screen gain factor.

So now I am confused what the problem could be. I do plan to call Sony and get the projector checked out. But do any of you see any obvious problem in throwing up a 100' image from a 800 lumens projector on a screen that is said to have a gain of 1.1? Is there any more detail about the setup that you need to know to comment on it? Appreciate any help.

On a side note, since the calibration, the image quality is superb when things are right (which I can achieve by reducing the image size to around 80" - something that we don't want to live with).



How many hours do you have on the bulb?
post #3 of 19
You may find this thread interesting:

http://archive2.avsforum.com/avs-vb/...1&page=1&pp=30
post #4 of 19
Thread Starter 
Quote:
Originally Posted by xbrush View Post

How many hours do you have on the bulb?

Roughly around 150-200 hours.
post #5 of 19
Quote:
Originally Posted by ssingh2 View Post

The setup is a Sony VPL-VW100 projector projecting on a Elite CineTension 100" screen. The problem is the images seem too dark unless I max out on contrast! The screen has a gain specification of 1.1. The projector is rated to be 800 lumens. The projector is set at about 14' from the screen. The projector was attempted to be calibrated by a well known ISF professional calibrator in our area - known as Mr. Bob in various internet forums.

Myself and Mr. Bob tried various menu options on the projector. We just couldn't get the image to be bright enough unless we maxed out on the contrast - which of course degrades the image quality considerably. Mr. Bob's opinion was that I should try a new screen - perhaps one from Stewart. I called up a local Stewart dealer, and he visited my HT to take a look. He thought changing the screen is not going to help much - I should get the projector checked, as the image is too dark for ANY screen gain factor.

So now I am confused what the problem could be. I do plan to call Sony and get the projector checked out. But do any of you see any obvious problem in throwing up a 100' image from a 800 lumens projector on a screen that is said to have a gain of 1.1? Is there any more detail about the setup that you need to know to comment on it? Appreciate any help.

On a side note, since the calibration, the image quality is superb when things are right (which I can achieve by reducing the image size to around 80" - something that we don't want to live with).


Perhaps you should try a DaLite High Power screen.
post #6 of 19
Thread Starter 
[quote=hrd]You may find this thread interesting:


Thanks for pointing to this thread. Looks like this is a known issue. For now I was able to get into the service menu and tweak the iris parameters (#43 and #44) to bump up the brightness quite a bit. The picture looks much better now. I don't know if it has any long term side effects or not. But looks like a high power screen is definitely a better match for this projector in the long run.
post #7 of 19
If "Mr Bob" is a calibrator he should at least be able to measure how much light the pj is putting out in iris auto, off, or on. If it is much less than the expected output, ~50% at 200 hours, you may have a problem with the pj.
post #8 of 19
[quote=ssingh2]
Quote:
Originally Posted by hrd View Post

You may find this thread interesting:


Thanks for pointing to this thread. Looks like this is a known issue. For now I was able to get into the service menu and tweak the iris parameters (#43 and #44) to bump up the brightness quite a bit. The picture looks much better now. I don't know if it has any long term side effects or not. But looks like a high power screen is definitely a better match for this projector in the long run.

Did you jot down what the factory settings in 43 and 44 were before you changed them? Maybe they were way off and that was why you had a dim image.
post #9 of 19
Thread Starter 
[quote=hrd]
Quote:
Originally Posted by ssingh2 View Post


Did you jot down what the factory settings in 43 and 44 were before you changed them? Maybe they were way off and that was why you had a dim image.

Yes, I did. #43 (which controls how much iris opens up during dard scenes) as set to 311. I changed it to 150. #44, which controls how much iris opens up during bright scenes, was set to 611. I changed it to about 300. Makes a vast difference.
post #10 of 19
Hmmmm. I have 330 hours on my Ruby and I never adjusted the IRIS mode. Very bright using a 130 inch Studiotek 1.3 gain... I guess this is the payoff I get for using CIH, an ISCO III, and almost max short throw distance of about 12 feet (1.45)
post #11 of 19
I just tried Alan's auto iris tweak #44 575 default --- changed to 100... Big difference the Ruby looks a lot brighter. I can't believe I waited a year before trying this. I have 880 hours on my Ruby...
post #12 of 19
This tweak makes the Ruby very close to the DLA-RS1. The JVC still has the best contrast and black levels that I've seen in my home theater but the tweak has breathed new life into my Ruby. Yay... Now I don't care about selling the Ruby. It's always nice to have a spare projector.
post #13 of 19
Thread Starter 
Quote:
Originally Posted by imws View Post

This tweak makes the Ruby very close to the DLA-RS1. The JVC still has the best contrast and black levels that I've seen in my home theater but the tweak has breathed new life into my Ruby. Yay... Now I don't care about selling the Ruby. It's always nice to have a spare projector.

I am also going to get a better screen in future - something with a higher gain. For now this tweak gets me going. I am considering between StudioTek (gain 1.3) or Dalite High Power (gain 2.0). Any opinions?
post #14 of 19
My last two screens were Studiotek... If the Diamond has 1000 ANSI lumens, I may drop to a 1.0 gain matte screen. I'd recommend Studiotek wholeheartedly...
post #15 of 19
Check out Tryg's review of the High Power: http://www.avsforum.com/avs-vb/showthread.php?t=773065

What throw distance are you at?
post #16 of 19
Quote:
Originally Posted by ssingh2 View Post

I am also going to get a better screen in future - something with a higher gain. For now this tweak gets me going. I am considering between StudioTek (gain 1.3) or Dalite High Power (gain 2.0). Any opinions?

There are several folks using both with great results. I use a Carada Brilliant White 1.4 in my setup. Check out the screen's forum for help in choosing.
post #17 of 19
I use a Vutec SilverStar with great results. It makes my Ruby have the plasma effect...
post #18 of 19
Quote:
Originally Posted by ssingh2 View Post

The projector is rated to be 800 lumens. The projector is set at about 14' from the screen. ).

Can you move it closer to the screen, to its minimum throw distance?
post #19 of 19
Have had a Ruby for about 9 months. Just had it serviced - they replaced the lamp and igniter assembly. The projector had developed an annoying 2 kHz squeak. Very noticeable during soft movie passages.

No charge by Sony (which I appreciated).

If you want more details, visit my homepage.

Also, I'm using a Vutec SilverStar and a very dark, light controlled room. In retrospect I could have used a slightly less 'sparkely' screen but the picture never fails to impress, especially on the best HD satelite broadcasts.
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