Uneven wear / white balance / logo burns on 65 inch Panasonic ZT60 - AVS Forum
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post #1 of 1 Old 08-11-2014, 04:11 AM - Thread Starter
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Unhappy Uneven wear / white balance / logo burns on 65 inch Panasonic ZT60

My main current set is a 65 inch Panasonic ZT60 purchased from Cleveland Plasma in mid October 2013.

The set *has* been used pretty heavily over the past 10 months. I would say 12-16 hours a day. Quite a lot!

I have recently began to notice (and now *really* notice) that the white balance has become uneven. Mainly, the top left corner area of the screen looks too red (almost as if it were "creeping in"), as well as along the sides slightly. I've also noticed some logo burns that are NOT "simple" image retention. I even notice retention / burn where captions appear (I often use captions).

In putting up some test patterns, I've noticed that the majority of the trouble seems to be with the red phosphors, although it doesn't show up on my camera.

Here's some pictures. Again, the white balance from my camera varies, but it does show the upper left corner variation on the IRE pictures, especially the 70 and 90 IRE. Click the images for full size:

90 IRE



70 IRE



50 IRE



RED



GREEN



BLUE



Some background info:

Running latest firmware (2.873).

The set is plugged in to AC via an APC Line-R 1200VA Voltage Regulator.

Regular TV viewing is through a Crystalio II VPS3800 Scaler at standard 1080P, HDMI, and scaling settings.

Given the heavy use, I run the screen wipe for at least 1 hour a day, sometimes 2. (I wonder if maybe that's too much?)

I am trying to think, and I don't believe I watch any material where there is any kind of static image in the upper left, except for the web browser... however, wouldn't that result in a square shape, not the "creeping in" circular pattern I am seeing?

I only use two video modes:

For TV and Discs (which is the majority of my viewing), I use the set's own THX Cinema mode:

Quote:
Picture Mode: THX Cinema
Contrast: 80
Brightness: 0
Color: 50
Tint: 0
Sharpness: 0
Color temp.: Warm1
Vivid Color: off
C.A.T.S. / Video NR / MPEG remaster / Resolution remaster / Caption smoother: Off
Brilliance enhancer: Strong
Motion smoother: Weak
=================
Advanced Picture:
Game mode: Off
1080p pure direct: On
HDMI Content Type / Auto Detail: Off
HDMI Range: Standard
Black Level: Light
================
Screen Settings:
Screen Format: Full
Overscan: Off
H Size: Size 1
Screen Display: On
4:3 side bars: Off
Pixel Orbiter: Auto
============
3D settings:
Auto Detect 3D: Auto 1
3D signal notification: Off
For the Internet, Browser, and Apps (I'd say about 25 - 30 % of the time), I use custom settings I pulled from the Internet; I can't remember where, it's either from D-Nice or CNET:

Quote:
Picture Mode: Cinema
Contrast: 80
Brightness: 0
Color: 50
Tint: 0
Sharpness: 0
Color temp.: Warm1
Vivid Color: off
C.A.T.S. / Video NR / MPEG remaster / Resolution remaster / Caption smoother: Off
Brilliance enhancer: Strong
Motion smoother: Weak
=============
Pro settings:
Panel Brightness: Mid
AGC: 0
Black extension: 0
Color gamut: Rec. 709
W/B: High r = -4 / High G = 0 / High B = -2 / Low R = 3 / Low G = 0 / Low B = 0

More Detail: Red / Green / Blue Gain:
-------------------------------------
100 IRE 0:0:0 / 90 IRE -2:0:0 / 80 IRE -2:0:0 / 70 IRE -2:-1:0 / 60 IRE 0:0:0 / 50 IRE 2:0:0 / 40 IRE 0:0:-2 / 30 IRE 0:0:-1 / 20 IRE 0:0:0 / 10 IRE 0:0:0

Color Detail Adjustment:
------------------------
Red Hue / Saturation / Luminance: 0 / -4 / -5
Green Hue / Saturation / Luminance: 14 / 10 / 1
Blue Hue / Saturation / Luminance: 0 / 0 / -7
Cyan Hue / Saturation / Luminance: 5 / 0 / 2
Magenta Hue / Saturation / Luminance: 12 / 8 / -10
Yellow Hue / Saturation / Luminance: 5 / 0 / 3

Gamma Detail Adjustment:
------------------------
Gamma: 2.2
Input Signal Level: Gain:
-------------------------
100 IRE 0 / 90 IRE -2 / 80 IRE -2 / 70 IRE 0 / 60 IRE 0 / 50 IRE 0 / 40 IRE 0 / 30 IRE -8 / 20 IRE -8 / 10 IRE 0

=================
Advanced Picture:
Game mode: Off
================
Screen Settings:
Screen Display: On
Pixel Orbiter: On
============
3D settings:
Auto Detect 3D: Auto 1
I was hoping others with this same set (preferably with the 65 inch screen) can put up some 100% Red, Green, and Blue patterns, and check for similar wear.

The set is far from unwatchable or anything, but I was hoping to keep this set for at least 3 or more years, and I'm worried that it's going to get a lot worse.

The last time I remember having similar logo burns and unbalanced / off axis white balance was on my 7 year old Pioneer Pro 710 CRT!

My last set (the one this replaced) was the Panasonic TH-65PZ850U. It got the same heavy use as the ZT60 from September 2008 to October 2013 (five years), and it had some *slight* logo burn, but that's it. No noticeable white balance variation, and nothing as bad as this. That was the generation of Panasonic sets that had rising black levels, but since this was a 65 inch set, it wasn't that big a problem, even though the black levels were not nearly anywhere near a Kuro or a ZT60. The PZ850U was however an overall brighter set than the ZT60. (It used a lot more energy and weighed a lot more.)

My Dad has a Pioneer Kuro (KRP-500M), which *also* has had heavy use since November 2009. In fact, he keeps the cable box guide up for quite long periods sometimes, yet I really don't see any logo or other burn in at all on it. White balance still looks perfect all around. It *does* have the "blushing" or "red flushing" issue, which I have read is kind of common, although as I understand it, it's not a "burn" or uneven phosphor wear. It is annoying, but (barely) tolerable.

In conclusion, I'm trying to determine if what I am experiencing on my ZT60 is normal, given my circumstances and conditions, or if perhaps I might have a defective display (perhaps the software or hardware that drives the red phosphors is faulty?) and I might be able to get it repaired or replaced under the manufacturer's warranty.

In searching around the net I can't seem to find any threads anywhere from anyone who has experienced anything like this on a ZT60 series set... although, others may not have as heavy a use as me.

Are there perhaps some specialized screen savers or snow / wash patterns I should be running?

I'm not ready for a "plasma beating" AX900! :P
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