Countering pink-tint on my F5300 with slides - Dumb idea? - Page 3 - AVS Forum
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post #61 of 84 Old 07-29-2014, 12:38 PM
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tom669,


Would the green tint I have on my screen be correctable with adjustments made to Vs? I have a green tint on the left side of the screen and pink across the bottom of the whole screen and the right side.
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post #62 of 84 Old 07-29-2014, 01:34 PM
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Originally Posted by Vegeta View Post
tom669,


Would the green tint I have on my screen be correctable with adjustments made to Vs? I have a green tint on the left side of the screen and pink across the bottom of the whole screen and the right side.
Is this a Samsung or Panasonic panel? As has been shown here, it's not always possible to predict what a voltage change will do. I can make suggestions based on my experiences, but no guarantees.
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post #63 of 84 Old 07-29-2014, 01:49 PM
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Originally Posted by orion2001 View Post
Hi tom, thanks for the info. What does maldischarge look like? Is it similar to the random RGB noise on black screens that you typically have but more pronounced. I did notice a decent amount of green dancing around on a black screen the other night but I'm not sure if it was always like that or whether it is an effect of dropping Ve down.

PS - Can dropping Ve like I did , along with low Vs damage the panel in any way or should I be okay to operate as is if I'm happy with the picture quality?
Maldischarge is different - It's usually not evenly distributed and is visible on darker scenes even with brightness at zero. I suspect you're either seeing dithering, or Samsung's selective cell reset technology which lowers black level but can create a slight dithering effect in dark rooms. Maldischarge usually tends to follow pixels which have been previously lit - like IR but more random and short term.

There should be no harm from lower Ve or Vs, although it's possible that in a couple of years time you may find you have to increase the voltages if you notice other symptoms. However I would be surprised if this is even necessary.
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post #64 of 84 Old 07-29-2014, 03:18 PM
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Originally Posted by tom669 View Post
Is this a Samsung or Panasonic panel? As has been shown here, it's not always possible to predict what a voltage change will do. I can make suggestions based on my experiences, but no guarantees.
It's a Samsung 60F5500 Plasma.
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post #65 of 84 Old 07-29-2014, 03:32 PM
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It's a Samsung 60F5500 Plasma.
From what we've seen I think you'll be able to get rid of the pink but I'm not certain the green will go.
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post #66 of 84 Old 07-30-2014, 12:34 AM - Thread Starter
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Black Optimizer and impact on Vs / Ve

I noticed a weird artifact a couple of times over the past few days and I was finally able to isolate it and obtain it reproducibly. Essentially, if I have a portion of the display showing black, and then I suddenly flash up a white/bright image/window, I can see that the individual pixels start turning on in a random fashion and it was taking ~ 1s for all the pixels to turn on. What this meant is that within that 1 sec, some pixels were still black, and this can be a bit distracting at times, though difficult to spot. If you have an HTPC hooked up to your TV, just set your wallpaper to black and drag a white window around to see what I'm talking about.

It turns out that higher Vs and Ve lowers the time for the pixels to turn on but doesn't completely alleviate the issue. So as a compromise, I went back to the spec level of Ve but I have kept Vs at 197V as it really does help considerably with the red tint.

After I closed the TV back up, it occurred to me that this issue might infact be caused by the black optimizer function. I know that typically, Plasma's need to keep each pixel primed which is why black screens still have some RGB noise to them. I suspected that the Black optimizer was reducing this effect, with the side-effect of it taking a bit longer to fire pixels back up when changing from black to an "on" state.

Sure enough, setting black optimizer to Off resolves this issue. I've decided to stick to the off setting for now. My black level reading goes up from 0.003-0.004fL to 0.005fL, so it isn't too bad.
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post #67 of 84 Old 07-30-2014, 02:21 AM
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Hope you get around to watching TV someday.
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post #68 of 84 Old 07-30-2014, 10:21 AM - Thread Starter
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Originally Posted by perchancetodream View Post
Hope you get around to watching TV someday.
. I have family visiting a few days from now, so I wanted to finish any last tweaks before I finally put in all the screws on the back panel and stop obsessing with the red-tint . Jury is still out if dropping Ve had any benefit when it comes to red-tint. I'll evaluate for a couple of days and if it seems like setting it back to factory specs did not make any observable difference, I'll just stick with how things are right now...low Vs and stock Ve.
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post #69 of 84 Old 07-30-2014, 02:19 PM
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Originally Posted by orion2001 View Post
. I have family visiting a few days from now, so I wanted to finish any last tweaks before I finally put in all the screws on the back panel and stop obsessing with the red-tint . Jury is still out if dropping Ve had any benefit when it comes to red-tint. I'll evaluate for a couple of days and if it seems like setting it back to factory specs did not make any observable difference, I'll just stick with how things are right now...low Vs and stock Ve.

Dude don't make excuses for tinkering with your tv. We need people like you tinkering otherwise no one would ever have any diy mods to fix issues like this.
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post #70 of 84 Old 08-06-2014, 09:00 AM - Thread Starter
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Just a follow up based on something I noticed yesterday - It appears that when the panel is driven harder, the red tint issue becomes more pronounced.

As I wrote in posts earlier, dropping Vs definitely reduced the red-tint issue on my panel. I calibrated my TV in Movie mode with max brightness of ~35fL for 100% white windows. However, for daytime viewing, I use Standard mode (Max brightness of ~50fL) and a Gamma of +1 or +2 to compensate for ambient light. The panel is driven much harder as a result, and I noticed that after ~30 minutes of viewing at these settings, a full white image had noticably more pronounced red-tint issues. Switching back to Movie mode got rid of the issue.
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post #71 of 84 Old 08-06-2014, 10:12 AM
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I noticed this too on the D450. On 3D mode, the red tint was pretty pronounced but only on full white. The panel does go up in brightness when showing 3D content. I had to set Vs at 217V, well away from the stock 205V, to get rid of the red tint. Lowering it made it worse and also presented a field of dead pixels. I think it's really odd that your panel works the other way; there might be something else that we're missing.
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post #72 of 84 Old 08-06-2014, 10:24 AM - Thread Starter
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Yeah, it doesn't make much sense to me either why lowering voltage would help with my panel. I wish there was someone else with the F5300 who tries tweaking voltages to address the pink tint issue.
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post #73 of 84 Old 08-13-2014, 02:18 PM
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Could it be one of the boards (Y,sustain etc)gone bad that cause horizontal or vertical bars through the screen(a common plasma issue)when it's on light screens and panning?

For reducing red push Does Anyone know if there's a difference between changing VS voltage pot ,and the Contrast and or White balance adjustments?

Last edited by Vic12345; 08-13-2014 at 02:32 PM.
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post #74 of 84 Old 08-20-2014, 05:49 AM
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Red push - isn't that what the Flesh Tone control is for? Or maybe in service menu adjust red gain?
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post #75 of 84 Old 09-02-2014, 07:29 PM
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I would only use flesh tone if one has a meter.Ive lowered gains a little in service menu.I don't think it does much but yours maybe different..If I lower vs pot too specs I get more dirty screen on panning.I have too play with vs pot more too figure the pink coloring issue.Every adjustment effects something in one way or another. Edit I think mine may get more pink tint color problems with vs voltage increase, but I will have too recheck this.Ill repost but it may be a few days.

Last edited by Vic12345; 09-03-2014 at 12:27 AM.
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post #76 of 84 Old 09-03-2014, 10:54 PM
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Long story short I've had pink discolorng ever since I adjusted vs pot without a meter...........I put up an all white screen for a few minutes with tv well warmed up and set too sticker values except vsc is 2 volts low and ve is 1/2 volt high.There is no pot adjuster for ve.Seemed what helped reduce random pink(and some green) discolored areas was lowering vsc which automatically lowered ve............The first time set vs,va,vsc too sticker values with ve 1 volt high had random pink(and green) areas.Although I was not using an all white screen or as warm of a tv with "first adjustments"................at least so far I think it's better.

Last edited by Vic12345; 09-03-2014 at 11:03 PM.
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post #77 of 84 Old 09-05-2014, 02:05 PM
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Have you tried lowering contrast to see if the issue is really color shifting at high apl scenes due to a contrast setting that is okay for low to Mid apl scenes but too high for high apl scenes?
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post #78 of 84 Old 10-30-2014, 11:29 AM
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Is it possible to find a PN60F5300B without the pink tint? I'm going to return my tv for a 3rd set, the 2nd had less pink but more green than the first (using Orion2001's settings). If it is at least as good as the first one I might have to keep it and live with it. The picture quality is great, but watching anything with a white screen (eg hockey) I notice it.
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post #79 of 84 Old 10-30-2014, 11:33 AM - Thread Starter
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Originally Posted by thecdnhammer View Post
Is it possible to find a PN60F5300B without the pink tint? I'm going to return my tv for a 3rd set, the 2nd had less pink but more green than the first (using Orion2001's settings). If it is at least as good as the first one I might have to keep it and live with it. The picture quality is great, but watching anything with a white screen (eg hockey) I notice it.
They do exist but they can be hard to come by. The floor model at my local Sears did not have any pink tint. My first set had a pretty strong pink tint. My current one had a mild one. Opening the back panel and tweaking the Vs voltage all the way down to the lowest setting helped quite a bit in reducing the pink tint further. At the moment, it isn't noticeable at all on pretty much 99.9% of content unless I am viewing black and white movies or all white images, and even then, it is very mild and not likely to be noticed by those not looking for it.
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post #80 of 84 Old 10-30-2014, 02:13 PM
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There's also pink color banding/discoloring too which seems impossible too eliminate with white balance.Fortunately its not very noticable on most tv shows..Zoyd said there's possibly a way too reduce it,but it involves (possibly fatal) an adjustment of one of the pots(can't remember which one).My tv doesn't have that adjustment(e450)..I'm wondering if Samsung cranked up the red gains in service menu to reduce red pink banding?
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post #81 of 84 Old 10-30-2014, 04:25 PM
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Not the topic but In regards too pink discoloring I seen a commercial with obvious discolored pink clouds and the only setting on the tv(I tried everything)that 90% reduced it was lowering the color control too near zero ( and raising green gain way up helped some).So it is either the source or the color decoder or green gain.
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post #82 of 84 Old 12-01-2014, 01:48 PM
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Quote:
Originally Posted by perchancetodream View Post
See here, here and here for example....
This pleases me. I have until January 15th to return it, so I think I can get at least 300 hours on the set by then. I have about 73 hours right now. In the last couple of days, I have noticed it fading very slightly. It's one of those things that if I didn't know about it, I'd probably never notice it, but right now it seems all I'm looking at is the bottom of the screen! Right now, I'm just running full screen content as much as I can. I've watched one two hours 2.35:1 movie. Typically, probably over 50% of the time I'll be watching 2.35:1 movies, so a pink tint at the bottom won't bother me much anyway.

I really do love the hell out of this TV. The PQ is fantastic and I love the size. I'd hate to have to return it for this one issue. I sincerely hope after a few hundred hours it goes away. For now, you've eased my concerns and I'm just going to enjoy my enormous new television.

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post #83 of 84 Old 12-01-2014, 02:59 PM
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Check how it looks on a white slide and a light gray one and you'll see what the deal is.

If it's pretty transparent like a diffuse cloud on only certain portions of the screen it will probably disappear after a while.

I returned my first Panasonic 55STW60 because the green and pink areas were pretty severe and I got a second set in hopes there would be no similar issue.

To my disappointment, the 2nd set also had some green and pink areas, but much more diffuse and transparent.

At that time this model was starting to disappear, and I had to think long and hard about whether to keep or return it, because I would not be able to live with a TV that could not display black and white without a color tint even with color saturation set to 0%.

So I researched it like you're doing and found some opinions, and decided to keep it and hope for the best.

It was the right decision, because the TV now has 500+ hours on it (subjectively, the picture seems to be getting better and better!) and . . . drum roll . . . the issue did in fact go away.

If you can barely notice it on your set now I would say your chances of the issue disappearing should be good.

Good luck!
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post #84 of 84 Old 12-01-2014, 03:20 PM
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Yeah, it's a pink/magenta tint to the bottom center of the screen and like I said, it's mostly only noticeable on the second and third white/grey break-in slides. It's less noticeable on the first pure white slide. I see it more on grey/beige colors. It is most certainly like a diffuse cloud. No pink dots or blotches or anything like that. I'm keeping it. Thank you so much for easing my troubled mind.

BTW - One thing I do miss about my Panasonic UT50 is that I could zoom in a 2.35:1 Blu-ray. Sometimes I like to put a movie on in the background while on my laptop or whatever and I always zoomed them in instead of leaving the black bar on the top and bottom. The Samsung does not offer this which is mildly disappointing. I can output 480p over the BDP in 4:3 and then I can zoom without stretching the image, but...ehhh...
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