Official Pioneer Kuro Reddish Tint Problem Thread - Page 34

Originally Posted by YOTR 

Yeah agree. Even though I might have it, it is really hard to spot. I rarely watch tv in a completely dark room anymore anyway. That has been the main reason I haven't sold it. Even with the possibility of red tint, nothing out there beats it.

Originally Posted by metallicaband 

As long as you don't see the issue Unless you're looking for it, you're fine. Some red tints have gone so bad that they distract you from watching TV in a dark room, just learn to control yourself and enjoy your set by not looking for it if your case isn't that bad.

Originally Posted by YOTR 

Thanks for the response. I definitely don't see it unless I look for it. I could barely pick it up in the black bars of certain scenes in 2001 on blu ray last night. At the beginning of 2001 there is a black screen while the music starts for a few mintues. After that, the movie starts. During that black screen you can see a subtle red tint to the screen. That was in a completely dark room with no light though and my eyes naturally start looking for it (you know how that goes). As much as I am impressed with the Elite and VT50, I don't think it makes much sense to upgrade. I know the value will drop this time next year but I don't think I am gaining much by upgrading. Plus I don't watch movies in the dark anymore. I normally have at least one lamp on which as you know completely eliminates any red tint at all.

Originally Posted by matte79 

Hi
Asked Pioneer Sweden and they forwarden my question about this to belgium.
They forwarded it to Pioneer Japan.
Finally this is the answer,,
The plasma drive technology used in the KURO panels enabled Pioneer to
achieve a significant reduction in black levels with improved picture
quality. A slight colour difference may be visible when watching TV in a
very dark environment. This slight colour difference has existed with most
if not all plasmas, including the earlier Pioneer models although it was
not as noticeable due to the higher black level as the KURO models.

Since the KURO models have been designed to have a much lower black level,
slight colour differences can be noticed over a period of time. This is
because plasma panels use 3 different coloured phosphors, red, green and
blue. Each phosphor has slightly different light emission characteristics
which change overtime. Since the change of the red phosphor is relatively
mild, the picture could appear to become warmer in colour. The panel
automatically corrects this change when displaying general moving images.

Any pictures appearing warmer in colour, when viewing dark images in a very
dark environment, is a result of the light emission characteristic of the 3
different coloured phosphors, and is not regarded as a fault. This is
unnoticeable in normal viewing conditions.

Originally Posted by Mac13 

Exactly...kind of sad that I am going to be so happy to replace my Kuro with a 65VT50. Of course the main reason to get a new panel is because I want a larger TV but it will be nice not to have reddish blacks anymore!

Originally Posted by matte79 

Where can I download the service manual?

Originally Posted by matte79 

I have 5090H. A service manual would be Perfect.

Originally Posted by matte79 

Do you have it in pdf?

Originally Posted by RobertR1 

The red tint issue is quite apparent on my set to the point my woman even notices it and she doesn't notice these things!
So what are my options? I bought in 2008 so warranty isn't an option.
I'm willing to do something risky given the panel lasts another year or so.
Looking at the marketplace it seems like we're in a transition period to 4k sets so I'm hoping to hold off.

Originally Posted by metallicaband 

You don't have many options when dealing with the dreaded red tint, I only know of these methods that had some success:
- Doing a pulse/hour reset, this is risky and many people recommend against it because you'll confuse your HDTV about its current lifespan and how it adjusts the voltages automatically. I personally didn't do this because it could need several touch ups as time goes on and that doesn't work well with my OCD nature lol.
- Playing with certain voltage values (you can look up about those in the recent pages of this thread, I also posted some info about it) without doing a pulse/hour reset, I did this and managed to lower the red tint effect of my 5020FD by decreasing the VOL YKNOFSA D value from the default 128 to around 95-100, it decreased the red tint a lot but I had a weird effect on blank screen where blotch like things form after leaving it for a while. I decided to use the normal values and only lower the VOL YKNOFSA D when I'm about to watch a movie in a completely dark room.
On a side note, I've had a very good offer to get a display model KRP 500M that only has 300 hours on it for $1000 from my local pioneer deal (I'm not from the states btw) so I bought it, I'll report to you guys if I noticed any red tint on that set in the future.

Originally Posted by RobertR1 

I'm at a point where I'll try whatever and if the set bombs, it bombs. It's bugging the hell out of me and I'm not even in the mood to watch any BluRay or quality content knowing it'll all be tinted red.
I was really wanting to hold off until next year to get a OLED set but those seem like a myth at this point also. Display tech is in a rut with empty promises.

Originally Posted by breuf 

I'm an italian user for this fantastic plasma display; I've bought it in January this year (it's a second hand) and I've been learning about it for the last 6 months!! I'm very enthusiast.
After reading many messages,I've decided to reset my display, it was 7000 hours with 4300 working hours.
Before reset:
VOL SUS=128
RSTP=018;
VOL YKNOFS1 D=138;
VOL YKNOFS3 D=128;
VOL YKNOFS4 D=149;
VOL YKNOFSA D=128.
After reset
VOL SUS=138 (with AVS 709 HD BD test disc some missfiring pixel were present if VOL SUS = 128);
the others parameter have been increased by 10 points exept for RSTP and YKNOFSA D they are still as original values as you suggested.
The problem i can see is a sort of lug of pixel in the meaning that in the very dark scenes I can see an effect like a glow for the images wich pass throgh the black scenes.
Is there any other procedure to fix this small issue?
p.s.: also the menu of the display like main av menu or volume are displayed with a very big delay when 2:35 black bar are on the screen ...
Thank you in advance

Originally Posted by tarao 

Edit: Also D-nice said that he confirmed the red tint panels have the factory setup voltage wrong, but I don´t find it explained. If there is a wrong voltage that is damaging our panels would not be advisable to publish it?