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KV34XBR910, calibration problem or normal behaviour ?

482 Views 5 Replies 3 Participants Last post by  ADU, 
T
Hello AVS and AVS users !


First of all thanks for everything, you have helped me in choosing my set, and I received it Friday (XBR910).


I have always calibrated with Avia, and for the first time, I have also calibrated colors through the service menu as explained in on of avs thread (Red push removed and green softened).


However, I am having problems calibrating the "picture" setting, as the set is never blooming at all...

For now, in the pro mode, picture is set somewhere in the middle of the possible values).


First question is : any way to set this value appart from the "blooming limit" limit that I can't seem to reach :)


Second question and most important one :

When there is some black after a bright scene, the "light" shadow of the previous scene remains on the screens (like the pixels are taking too much time to "turn off"). I am quite puzzled with this, as I have never had this behaviour on my previous set (KV27).

I have been told that this was linked to the "set not broke in"... and that things should be better in a short while...


Any Help would be greatly appreciated !


Regards,
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T
Use a test pattern with the graduated gray scale steps and adjust picture/contrast so you distinguish them all from each other. If its set too high the highest white levels will all look the same.
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When there is some black after a bright scene, the "light" shadow of the previous scene remains on the screens (like the pixels are taking too much time to "turn off"). I am quite puzzled with this, as I have never had this behaviour on my previous set (KV27).

I have been told that this was linked to the "set not broke in"... and that things should be better in a short while...
That's possible. From what I've seen, the phosphors on the big Sony tubes are fairly high persistence though, so they may tend to hold an image a bit longer than some displays. If you do a search on "phosphors trails" you'll find alot of discussion on this here. It's possible that the persistence may diminish slightly after the TV is broken in, either that or people's sensitivity to it seems to diminish, I'm not sure which.


Avoid watching the TV in total darkness as well, and it should be less apparent. Keep a few dim lights on around or behind it, but not shining directly on the screen.
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There are a lot of different schools of thought on how Contrast should be adjusted on these TVs, there are so many factors involved like viewing distance, ambient light levels, etc. that it's difficult to give decent advice on this. I'd recommend poking arond a bit and searching some of the larger XBR910 threads for more ideas on this. Or searching under terms like "Contrast" and "34XBR910".


My general philosophy would be adjust it until you can see well, but not so bright that it hurts your eyes from your normal viewing distance. A few more related tips here .
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Thanks for the advices !


I am using ambient lightings... regarding the grey scale, as I said in my first post in this thread, the problem is that even with contrast at full (very very bright), I am still having all grey squares defined and separated in the test pattern, and that blooming is just not happening :)


However to make a long story short, I received my set friday night, and it blew off this morning... Not too bad isn't it :)


Maybe the very high persistence I noticed was linked to the failure that happened this morning...


I hope the Montreal's shop where I purchased the set (with extended garanty) will provide a good service, they are supposed to call tomorrow morning... wait and see !


Thanks again !
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even with contrast at full (very very bright), I am still having all grey squares defined and separated in the test pattern, and that blooming is just not happening
In my experience, these TVs will actually start to bloom if Picture is set above the usual default setting. It won't be that noticeable except on small details though. So it's sort of a minor issue.


The off-white squares aren't a very good test either on these TVs.


Sorry to hear the TV went kaput!
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