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Official Panasonic TC-PxxVT20/25 Owners Thread NO PRICE TALK!! - Page 349

post #10441 of 10650
Quote:
Originally Posted by DJ Matt View Post

Every set has its weaknesses, but to me the fluctuating brightness levels is too big of a witness and an issue. I did extensive research before making the purchase last year and not one expert review or anyone mentioned anything about this. This TV is supposed to be better than other sets, especially better than LCD's as far as black levels and detail display in the darker areas of the picture. The floating blacks pretty much ruin all of that. Whats the purpose of having a TV with some of the best black levels on todays market and all of that when its ruined by this issue.

As you, I did pretty extensive research as well and for things like fluctuating brightness and floating blacks to get missed is hardly believable, but it did. Not one review I read ever mentioned these issues. Not one professional calibrator in these forums ever mentioned it. It sucks and for us, we are too far into this TV to replace it. I fully expect Panasonic to make this right one way or another.
post #10442 of 10650
Just passed 2000 hours on my 50VT20 and the fluctuating brightness seems to have gotten worse. Especially on 2:35 movies it almost like somebody is turning on light on and off within the picture. It's getting very annoying. Otherwise this is still a great set.
post #10443 of 10650
Quote:
Originally Posted by cuse311 View Post

Just passed 2000 hours on my 50VT20 and the fluctuating brightness seems to have gotten worse. Especially on 2:35 movies it almost like somebody is turning on light on and off within the picture. It's getting very annoying. Otherwise this is still a great set.

Just out of curiosity, do you have C.A.T.S switched on? I never see any issues with fluctuating brightness......Mine is switched to "off", just a thought...
post #10444 of 10650
Quick question. I have TC-P50-25. Did anyone get the VUDU app with the
Viera Cast to Viera connect update. If not can anyone think of a reason
why we would not get it. If anyone knows anyone that works for
Panasonic could they find out.

Thank You
post #10445 of 10650
Quote:
Originally Posted by 007james View Post

Just out of curiosity, do you have C.A.T.S switched on? I never see any issues with fluctuating brightness......Mine is switched to "off", just a thought...

Everyone has CATS turned off and is still noticing the issue.
post #10446 of 10650
Quote:
Originally Posted by cuse311 View Post

Just passed 2000 hours on my 50VT20 and the fluctuating brightness seems to have gotten worse. Especially on 2:35 movies it almost like somebody is turning on light on and off within the picture. It's getting very annoying. Otherwise this is still a great set.

Is it happening more in one picture mode or basically the same no matter which mode you are using?
post #10447 of 10650
Quote:
Originally Posted by 007james View Post
Just out of curiosity, do you have C.A.T.S switched on? I never see any issues with fluctuating brightness......Mine is switched to "off", just a thought...
C.A.T.S Off. I use THX picture mode w/24P enabled on the Blu-Ray player.
post #10448 of 10650
Quote:
Originally Posted by cuse311

C.A.T.S Off. I use THX picture mode w/24P enabled on the Blu-Ray player.
I am over 4000 hours and still have floating blacks. I leave a light on that's pretty close to the TVs and that seems to have helped. But I don't think this issue goes away I think we just notice it less. Its obviously a hardware problem.
post #10449 of 10650
Quote:
Originally Posted by X2Dope View Post

I am over 4000 hours and still have floating blacks. I leave a light on that's pretty close to the TVs and that seems to have helped. But I don't think this issue goes away I think we just notice it less. Its obviously a hardware problem.

Well, I feel lucky because when I watched the chapter (26?) of Dark Knight i did not see any floating blacks. When I first got the TV, I did note some black blobs floating in dark scenes ( is that floating blacks?) and I never have issues with brightness. I figured most people had C.A.T.S switched off but it never hurts to suggest.
post #10450 of 10650
I doubt there's much question that calibration is a big factor in whether a person is bothered by floating blacks. There's some amount of AGC being applied regardless of settings, but a correctly calibrated panel will show a lot less of it. Viewing conditions will obviously be another factor, and whether a person is actually looking for it.

I've never noticed it on my 65VT25, but I've never looked for it either. ISF and THX calibrated. There are quite a few other processing issues in this display that don't get near as much attention as this, and should.
post #10451 of 10650
Quote:
Originally Posted by rdgrimes View Post

I doubt there's much question that calibration is a big factor in whether a person is bothered by floating blacks. There's some amount of AGC being applied regardless of settings, but a correctly calibrated panel will show a lot less of it. Viewing conditions will obviously be another factor, and whether a person is actually looking for it.

I've never noticed it on my 65VT25, but I've never looked for it either. ISF and THX calibrated. There are quite a few other processing issues in this display that don't get near as much attention as this, and should.

Actually the one thing I do see from time to time is motion jitter during panning scenes....
post #10452 of 10650
Quote:
Originally Posted by 007james View Post

Well, I feel lucky because when I watched the chapter (26?) of Dark Knight i did not see any floating blacks. When I first got the TV, I did note some black blobs floating in dark scenes ( is that floating blacks?) and I never have issues with brightness. I figured most people had C.A.T.S switched off but it never hurts to suggest.

Floating blacks and the flux in brightness are two different issues. The new term is "FBr" fluctuating brightness.
post #10453 of 10650
Hello. Didn't post for a while as I had nothing bad to report on my 65vt25.
Happy to report still no 'major' problem with the set, not a single time did I get this 'fluctuating brightness' problem people report now. I have the tv for a year now (manufacture date: July2010).

I did notice this though:

1) this july when we had our warmest july month in 50 years in Montreal, I noticed the tv was like an oven, especially about 1 foot from the screen. We were sweating like pigs in my basement.... I must say the tv never overheated whatsoever. Guess it's normal for plasma to be super warm. Fall is slowly setting in here and temps are down and the tv is not as hot. Good news.

2) I have a APC Power Conditioner S15 and everything is plugged in it. I notice now many times the AVR (Automatic Voltage Regulation) coming ON then OFF after a few minutes depending on the brightness on the screen.
APC manual quote: '''The S10 and S15 are unique in that they provide AVR, which is engaged to correct low and high voltage conditions. In doing so, all equipment connected to the S10 or S15 are protected against these undesired voltage fluctuations, thus prolonging the life of the equipment. Low voltage conditions can also negatively impact video quality. AVR, therefore, may help improve picture quality if low voltage conditions are present.'''

I wonder if this AVR is preventing the brightness problem on my set ? When it's coming ON or going OFF, I never noticed any picture problem.

Also I upgraded to firmware 3.72 a few days ago and I played Avatar bluray 3D and I believe the 3D is better, there seems to be more depth now on the overall picture. Am I dreaming ? On the Panasonic web site, they describe the upgrade as going from viera cast to viera connect, period...
Viera connect by the way is better...
Any ideas/thoughts ? Cheers !
post #10454 of 10650
I need your help ....... now I have the tc-p50v25, and maybe one of you help me with the calibration, since I reside in El Salvador. Update Version 3.72
post #10455 of 10650
Anyone have the "final" word on the loss of blacks in the VT25?

Last I heard, awhile ago, they definitely did lose their black levels - even after being promised that they wouldn't by Panasonic...

What is the latest update?

post #10456 of 10650
Quote:
Originally Posted by bigroot View Post

Hi all,

Had my VT25 for almost a year now and love it. However, while watching golf the TV just powered off and back on again. I could hear the relay click as well. Did a search but couldnt find anything.

Should I be worried?

Thanks.

Just wanted to give an update. In the past 2 weeks, my tv has turned off and back on about 4 times. Also, I have been hearing a high pitched buzzing sound that lasts about 2 minutes.

Called panny because my warranty would be up in 2 days. Got a tech coming out tomorrow to swap out 2 boards.
post #10457 of 10650
Originally Posted by Pabgon
On another forum I asked a Panasonic representative why there is a fix for the fluctuating brightness on the 2011 models and there is no fix for the floating blacks on the 2010 ones, this is what he replied:

" 2 reasons.. 1-mgmt at the time made that choice. one i didnt agree with . 2- to fix such an issue wasnt swapping a board or an sd card update. it was built into the tv unfortunately. "

Can you send me a link to this forum via my private message box?

Thanks.
post #10458 of 10650
Quote:
Originally Posted by bigroot View Post

Just wanted to give an update. In the past 2 weeks, my tv has turned off and back on about 4 times. Also, I have been hearing a high pitched buzzing sound that lasts about 2 minutes.

Called panny because my warranty would be up in 2 days. Got a tech coming out tomorrow to swap out 2 boards.

Tech swapped out the power supply board and the main board.

Now I have lost all my settings. Should I update to the latest firmware before I apply d-nices settings?
post #10459 of 10650
I am not sure what has happened but my floating blacks have seem to have stopped.I watched Harry Potter half blood prince and deathly hollows and neither produced this effect on my second viewing.
These two movies were the worst offenders the first time i watched them and it was very annoying.I did upgraded the firmware to the latest 3.72, but that never solved the problem as the floating blacks were still there.This last week no floating blacks.
The tv is the vt20 has been isf calibrated by a pro and is approaching 3000 hours of use.I really cant explain what happened but very happy.Maybe C.A.T.S got corrupted even though it was always off.
post #10460 of 10650
Quote:
Originally Posted by yiorgo1313 View Post

I am not sure what has happened but my floating blacks have seem to have stopped.I watched Harry Potter half blood prince and deathly hollows and neither produced this effect on my second viewing.
These two movies were the worst offenders the first time i watched them and it was very annoying.I did upgraded the firmware to the latest 3.72, but that never solved the problem as the floating blacks were still there.This last week no floating blacks.
The tv is the vt20 has been isf calibrated by a pro and is approaching 3000 hours of use.I really cant explain what happened but very happy.Maybe C.A.T.S got corrupted even though it was always off.

Thanks for sharing your experience, mine are greatly reduced but still there(approximately 2100 hours of use)... I'm hoping they dissapear completely someday
post #10461 of 10650
So what are all of the most prominent problems assocaited with the VT25 series....?

1. Floating blacks
2. Flux in brightness
3. Loss of black levels

Others?

post #10462 of 10650
^^^ Floating blacks for me.
post #10463 of 10650
Quote:
Originally Posted by ThePrisoner View Post
^^^ Floating blacks for me.
Same Here!

All the best,

Michael
post #10464 of 10650
I'm thinking of bringing my 50VT25 to my upstairs TV room and bringing down my 50PZ800U to the main living room. The floating blacks are driving me crazy!
post #10465 of 10650
Quote:
Originally Posted by ThePrisoner View Post
I'm thinking of bringing my 50VT25 to my upstairs TV room and bringing down my 50PZ800U to the main living room. The floating blacks are driving me crazy!
I know what you say because I was in the same boat as you, you have to be patient, they will reduce in time, what I don't know is if they will ever dissapear completely...
post #10466 of 10650
I have had my 50VT25 for almost 1 year, never experienced the floating blacks
post #10467 of 10650
Quote:
Originally Posted by FAiello View Post

I have had my 50VT25 for almost 1 year, never experienced the floating blacks

Personally, I think it gets better over time. If your brightness is set too high it seems to be worse.
post #10468 of 10650
Quote:
Originally Posted by 007james View Post

Just out of curiosity, do you have C.A.T.S switched on? I never see any issues with fluctuating brightness......Mine is switched to "off", just a thought...


I have had my 58VT25 since April and its a wonderful set. I don't notice floating blacks at all on my set. I am not saying they arent there, but if they are i dont notice them at all. I watch a ton of hockey and have never seen the brightness fluctuate either. I think many of you are expecting a perfect TV. There is no perfect TV. Had you bought the top of the line Samsung last year you would have been complaining about the problems or issues that set has.

Every single set on the market has its issues.

Mike
post #10469 of 10650
Quote:
Originally Posted by Tunnel View Post

I have had my 58VT25 since April and its a wonderful set. I don't notice floating blacks at all on my set. I am not saying they arent there, but if they are i dont notice them at all. I watch a ton of hockey and have never seen the brightness fluctuate either. I think many of you are expecting a perfect TV. There is no perfect TV. Had you bought the top of the line Samsung last year you would have been complaining about the problems or issues that set has.

Every single set on the market has its issues.

Mike

I totally agree with you. I am very happy with mine. I do notice the floating blacks however but once immersed in a good movie or program, it is just a minor disturbance.

All the best,

Michael.

P.S.: Nice name by the way
post #10470 of 10650
I believe if you change out the D-boards this will fix the floating blacks. The original D-boards had part# of TNPA149AHP the updated board is TNPA149AHS.
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