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The Official LG xxPK550 Owner's Discussion Thread [no price talk] - Page 172

post #5131 of 5211
Quote:
Originally Posted by mtosic View Post

I'm trying to calibrate my 50PK550 (european model) using HCFR and Eye One Display 2.

In expert profile, when I choose 20 IRE pattern, I can calibrate 100% IRE pattern without problems.
But when I go to 95% pattern or 80% pattern, no matter how I move RGB values on LG, HCFR shows no change in RGB values?

Is that some kind of bug?

I assume you've changed the ire setting in the calibration menu to match the test pattern? (ie at ire 85 pattern, the tv is set to calibrate ire 85)
post #5132 of 5211
Quote:
Originally Posted by harvro01 View Post

I assume you've changed the ire setting in the calibration menu to match the test pattern? (ie at ire 85 pattern, the tv is set to calibrate ire 85)

Of course, I'm using AVS HD 709 5% greyscale patterns.
I will try again today, but it's very awkward, 100% pattern responded perfectly to changes.
post #5133 of 5211
Quote:
Originally Posted by mtosic View Post


Of course, I'm using AVS HD 709 5% greyscale patterns.
I will try again today, but it's very awkward, 100% pattern responded perfectly to changes.

Mine certainly worked fine using the same patterns, all ire's responded well except those at 20 or below. having said that I got a heavy green push using the eyeone meter you are using, and when I calibrated it with a different meter, I got different and more pleasing results, not sure why this was the case, but the eyeone meter certainly did not like the pk550 for me.
post #5134 of 5211
Hi everyone.

I've had my 50PK550 for a while. While I've never had a problem with black levels with normal lighting, I watched some dark material with all my lights off on it, and the results were terrible.

My 50PK550's blacks look so gray, just like a CCFL LCD screen. I thought plasmas were good with blacks?

Another thing I noticed. When a black screen is on, the screen looks like it has backlight uniformity issues, but AFAIK that's a LCD issue (hence the name), and plasmas shouldn't have this issue because each phosphor can be turned off by itself. It looks exactly like LCD's backlight bleeding because the edges of the screen are grayer than the center.

How does your blacks look on your PK550 in a completely dark room?

I'm using 100 contrast and 50 brightness.
post #5135 of 5211
I have had this TV for a year and still love it! question please:

I live in the USA.

I have a oppo Blu ray player that outputs 1080i:50hz. I want to buy the UK Planet Earth Special Edition version which displays 1080i:50hz/25fps natively. Will my LG pk 550 output this refresh rate ok?
post #5136 of 5211
Quote:
Originally Posted by LowerFE View Post

I'm using 100 contrast and 50 brightness.

Just wow.
post #5137 of 5211
Quote:
Originally Posted by Patsfan123 View Post

Good call. Let us know how it compares to the 2010 models. I have a 60PK550 and a good friend just picked up a 60PZ550 because he was so impressed with mine. I am going down to take a look at it this weekend.

I've had some time with the 50PZ550 & the black levels are quite good, as is the detail in the shadows.The picture may or may not be quite as sharp looking as the 50PK550 when watching HD programming, too much time between seeing both sets functioning 100%, but the audio is considerably better. I'm happy with way LG stepped up & took care of the problem.
post #5138 of 5211
So, I need some help with burn-in/IR, whatever you want to call it. Earlier in the week I noticed some burn-in/IR resulting from playing GT5.

I have run the white wash wash, color wash and break in slides and I cannot get it to go away. Is this permanent? I have had some momentary IR, but it has always gone away after a few minutes of watching regular TV or doing a color wash.

Any advice?
post #5139 of 5211
Quote:
Originally Posted by Mindspin311 View Post

So, I need some help with burn-in/IR, whatever you want to call it. Earlier in the week I noticed some burn-in/IR resulting from playing GT5.

I have run the white wash wash, color wash and break in slides and I cannot get it to go away. Is this permanent? I have had some momentary IR, but it has always gone away after a few minutes of watching regular TV or doing a color wash.

Any advice?

How long did you play GT5 for? Generally, it will take just as long for the IR to go away as it took to present itself. Also, if you have your contrast cranked up high that can make the IR more severe. It will, however, go away.
post #5140 of 5211
I was just wondering if the LG 42" 720p PT350 Plasma has a Color Gamut(as in setting the color gamut to Wide) and a Color Management System?

I'm currently rocking the LG LK450 which of course has all of that. But I'm guessing when it comes to basic picture control options, that if you both set the color to max on each set that the LG Plasma would beat it out giving you richer more vibrant colors?

The only way i can achieve these super colorful vibrant colors(which i use for certain games like Mario for ex) is by changing the color gamut to wide, and pumping up the main colors(usually 10-20/30 depending in the Color Management system). And while this dishes out amazing & gorgeous looking color on my LK450 LCD it of course comes at a bit of a price. Since it crushes a bit of detail....Well, only very light details that are on a color that's almost the same, which completely saturates the two together and makes it a solid. I don't mind this for certain games, but it's still annoying.

Anyways, does the LG Plasma have these color gamut and color management system options? Because when all said and done if it weren't for the color gamut setting AND the color management system my LG LCD wouldn't be up to snuff compared to my CRT in the color department.
post #5141 of 5211
Quote:
Originally Posted by hbsprite View Post

How long did you play GT5 for? Generally, it will take just as long for the IR to go away as it took to present itself. Also, if you have your contrast cranked up high that can make the IR more severe. It will, however, go away.

Been playing like 45-60min a day on average. Maybe I just need to stay away from it for a few days to really get it off the screen.

Ran the break in slides for a few hours today while I was out running some errands, will continue to do that when I have the opportunity.


Contrast is at 73, btw. I havent been in the thread in months, have their been some agreed upon settings that really work for the set?
post #5142 of 5211
Hello. Mine just died a few hours ago. Everything was ok a day ago, today it wants to start, the screen lightens and then I hear a click sound and it turns off. Then retries to start. I powered it off for the moment, and hopefully someone will pick up tomorrow.

Possibly some capacitors on the power supply unit have gone. After 8 months, with low daily usage (sometimes only 2 hours a day), it leaves me with a pretty bad taste regarding the quality of the components.

And I've seen the capacitor problem, more and more, with computer power supplies. One of my colleagues, very good with electronics, told me that the first thing he checks when he receives a computer that has problems starting is the power supply. And most of the times he quickly finds "swollen" capacitors.

I'm sorry, PQ is very good, except in bright light, when even THX bright does not cope well with it (but I knew that from the beginning), but parts quality seems pretty low. Just as the price was ... (got it for the equivalent of 1000 USD exactly 8 months ago).
post #5143 of 5211
What is the exact purpose of the white wash/color wash? Will is reset my picture settings? Should I do one every so often? I've had the TV for almost a year and I've noticed that burn-in is getting a little worse. Great TV otherwise.
post #5144 of 5211
Quote:
Originally Posted by jtrippe View Post

What is the exact purpose of the white wash/color wash? Will is reset my picture settings? Should I do one every so often? I've had the TV for almost a year and I've noticed that burn-in is getting a little worse. Great TV otherwise.

Its purpose is to clear image retention/temporary burn in. I have the pk550 50" going on a year and a half. No issues with ir that didnt go away in time and whenever i finish a few hours gaming i run the color wash for about 15-20 and all is well. I've also noticed that the more ir the longer color wash rins until it times out. White wash serves the same purpose but should be used more sparingly since it places a heavy load on the power supply.

What are your picture settings, namely the contrast and brightness?

ps. I've had mine set to cinema since day 1. It gives the most natural picture without calibration...
post #5145 of 5211
Still there, grr..
post #5146 of 5211
Quote:
Originally Posted by Mindspin311 View Post

Still there, grr..

Ir wont go away by leaving the tv off (not sure if thats what you meant, but...) It has to be on and running an alternating/changing picture. Run the color wash about 4-5 times and let it run its course. After each run wait an hour, let the set cool down, run the white wash for about 20-30 mins. Wait another hour for cool down, rinse and repeat as necessary. This should clear it up for sure
post #5147 of 5211
Quote:
Originally Posted by Sousa86 View Post

Ir wont go away by leaving the tv off (not sure if thats what you meant, but...) It has to be on and running an alternating/changing picture. Run the color wash about 4-5 times and let it run its course. After each run wait an hour, let the set cool down, run the white wash for about 20-30 mins. Wait another hour for cool down, rinse and repeat as necessary. This should clear it up for sure

Of course it wont go away with the set off

I did a couple hours of break in slides last weekend when I was out running some errands.

I noticed that the TV will turn off if you leave the color was going for a long enough time period. Is this programmed into the TV?
post #5148 of 5211
Yeah its a programmed feat. I notice it runs longer when there is more ir, or maybe I'm crazy and its a coincidence i think the color slides would be good when you have to leave for a while, but its been my experience the color wash does a better job with ir than color slides. Maybe its because the level of brighter colors involved...but try mixing in the color slides with color wash and white wash and see if that helps
post #5149 of 5211
Hello all,

My brother has the 50PV550 and on their thread in this forum, a member found a way to improve the black levels by adjusting two potentiometers behind the tv.

I went to his house last night and in about 25 mins, we did it. He is using the Cinema setting and the difference in black level was very noticeable when watching a movie. We tried Dark Knight and Nightmare before Christmas and it felt like you could put your hand in the screen.

We tried the modification this afternoon during my lunch break on my 60pk250 and it worked. I will provide the link soon as I am typing this from my iPhone. It was a cinch to do. The only pain was removing my tv off the wall.

Edit: Here's the link to the PVForum:
http://www.avsforum.com/avs-vb/showt...1346417&page=9
post #5150 of 5211
Hi guys,

I just did the Pot trick on my 50PK550
adjusting only the Set_up (full clockwise)

al I can say is WOW what a difference - almost Kuro Blacks !
and no IR anymore.


update: had to turn Set_up 3mm back & Vy to original status.
So do not touch this Vy one , I had red & yellow pixels showing.

I'd recommend putting the tv on a bright screen (checkerboard would be best) to do the adjustment
slowly turning Set_up till you get pixel misfires ifso go 1mm back .
before closing the tv, put it on a bright and dark screen to check pixel misfires
then turn tv off for 10min and turn it back on check again.
My problems started when the tv was cold.

I'll try it again later with th other DN and Vs pot's when i've got time.
Happy now with a small improvement , (although IR is back now :-( )
ps: I do put Brightness a bit up now (54) (was loosing some shadow details at 50)

Ciao
LL
LL
post #5151 of 5211
I did the adjustment last night. Makes all the difference! It has breathed new life into my 550. You can read about it here: http://www.avsforum.com/avs-vb/showthread.php?t=1372479
post #5152 of 5211
Hi I was just wondering if there is some sort of firmware update or anything to help me solve the dancing pixel issue?

Thanks.
Bryanpog
post #5153 of 5211
Just wanted to share my experience in doing these adjustments, I was hesitant to do it in the first place as I was concerned about what was actually happening, however I downloaded and read the factory manuals which explained a lot.

I have a 60PK550

The end result is WOW, what a difference. A fair bit of work tweaking various pots (I did all 7) but the end result is worth it. WAY deeper blacks, no difference in terms of noise or pixel misfires.

My experience with the various adjustments (and in the order I did them, following the factory LG sequence from the manual) is as follows:

VS: Counterclockwise results in some noise in lighter pixels and lowers MLL, turning clockwise corrects the pixel noise and raises MLL but too far clockwise, and my set just shuts off and will not restart. In the end, I only adjusted this pot a hair clockwise to get rid of the white pixel noise.
VA: Clockwise lowers MLL.Did not cause any misfires for me so mine is cranked fully clockwise.
VSC: Made no appreciable difference one way or the other to anything so mine is left at centre position.
Vy: Turning clockwise results in higher MLL, counterclockwise results in lower MLL. Does not appear to introduce any artifacts or noise so mine is cranked counterclockwise.
Set_Up: Clockwise lowers MLL. I've read that turning this fully clockwise can cause some pixel misfires, however this does not appear to be the case with my set, so mine is fully cranked.
Set_Down: Clockwise lowers MLL, however fully clockwise for me also introduces may pixel errors, pixels not resetting after changing colour, so I had to back mine off a bit from fully cranked clockwise until these disappeared.
VZB: Appears to affect the 'dullness' of the overall image, minimal effect on MLL that I can tell. Clockwise seems to give the picture more 'pop', while counterclockwise gives a more washed out image. Mine is cranked fully clockwise.

As others have said, I'm sure individual results differ, but for me, the few hours tweaking these pots and looking at test images and videos are well worth it. I would say that black letterbox bars are more or less gone and blend into the bezel now. Images seem to have way more pop and depth. I have never had any issues with image retention with my set (14 months old now) and nothing seems to have changed in this regard with the tweaks.

Initially, I was trying to follow the technical manual and adjust VS and VA to the voltages listed on my panel sticker as suggested. Mine were slightly off from the sticker. This however raised the MLL and so I just fiddled with pots to see what happened in the end. I'm glad I did.
post #5154 of 5211
I know there have been a few posts about a rolling line going up the screen and screen tearing. I'm experiencing these things ever since my TV was serviced and the panel was replaced.

At first I Thought it was my DirecTV receiver, replaced that and it didn't help.

Then I sent my Denon AVR in for service thinking it was that, nope..replaced HDMI board still doing it.

When I hook the DirecTV up to the PK540 directly I don't see the issue, but when it runs through the receiver I see it.

I've replaced all cables and even re-cabled everything thinking it might be some sort of electrical interference, no change.

Tested with a 25 inch 1080P TV set I have as a spare and I don't see the issue at all, the second I connect the PK540 it's there again.

I've ordered an HDMI Voltage Inserter as recommended by another member in the Denon thread but I was wondering if anyone else had this issue and found a fix for it? I'm hoping this HDMI voltage injector will fix the issue for me, but it still doesn't explain why it only started happening after the service call.

I know that LG will blame it on Denon or DirecTV, so I'm not even sure it's worth bugging them again about it.
post #5155 of 5211
Hi all,

I have searched this thread over the year and am reposting a problem I saw back in January. Would like your thoughts on this.

I noticed that when using hdmi through the receiver, I am seeing occasional flickering horizontal lines. They occur near the middle of the screen and sometimes in the lower quarter of the screen, always going horizontal. At time, while watching sports, the screen or image appears to judder or skip, only for a brief second. This can be seen when the xbox 360 is on, blu-ray player, or directv is on. I was looking around online and noticed people have posted this being a receiver problem, I don't think that is the case here. Just wanted to see if you have seen anything like this. Do I need to calibrate the TV properly, I have seen this with custom settings or stock settings. I welcome any thoughts anyone has. I only started noticing this earlier this year (2011) and got the TV mid 2010.

UPDATE: Problem is still there and to be honest, mostly during the first 30-60 min of the TV being turned on. If the TV has been on for hours, I rarely see this if at all. It does happen with any HDMI or Composite and Component cables going straight to the tv and not through any receiver.

Thanks.
post #5156 of 5211
Quote:
Originally Posted by ajmaverick View Post

Hi all,

I have searched this thread over the year and am reposting a problem I saw back in January. Would like your thoughts on this.

I noticed that when using hdmi through the receiver, I am seeing occasional flickering horizontal lines. They occur near the middle of the screen and sometimes in the lower quarter of the screen, always going horizontal. At time, while watching sports, the screen or image appears to judder or skip, only for a brief second. This can be seen when the xbox 360 is on, blu-ray player, or directv is on. I was looking around online and noticed people have posted this being a receiver problem, I don't think that is the case here. Just wanted to see if you have seen anything like this. Do I need to calibrate the TV properly, I have seen this with custom settings or stock settings. I welcome any thoughts anyone has. I only started noticing this earlier this year (2011) and got the TV mid 2010.

UPDATE: Problem is still there and to be honest, mostly during the first 30-60 min of the TV being turned on. If the TV has been on for hours, I rarely see this if at all. It does happen with any HDMI or Composite and Component cables going straight to the tv and not through any receiver.

Thanks.

This seems to affect a few people, including me. The situations all differ though. In your case does this happen on all your sources? If so there really isn't any setting on the tv that would cause that.
post #5157 of 5211
Quote:
Originally Posted by totalkonfuzion View Post

This seems to affect a few people, including me. The situations all differ though. In your case does this happen on all your sources? If so there really isn't any setting on the tv that would cause that.

Yeah, at first I thought it was solely HDMI as this was what I primarily watch TV through. And I have it fed through a receiver. But, I have since had all types of inputs, VGA, Component, Composite, etc. on multiple devices to include digital cameras, laptops, video game systems going straight to the TV or receiver. Seems to be the TV to me. And I do agree that there is not a "tv setting" to prevent this. Anyone else have any other insight? Thanks.
post #5158 of 5211
okay, so I played with the pots as well and my first impressions are - wow and wooow and more woooooow! Almost maxed VZB, Set_up and Va, just a notch away from max and didn't bother with the others. Set_dn produced some color confusion so I turned it back to factory settings.
post #5159 of 5211
I am very excited about the results I achieved adjusting the pots on my 60PK540. MLL is now 0.008 FtL.

Please have a look here

http://www.avsforum.com/avs-vb/showt...5#post21373555
post #5160 of 5211
Quote:
Originally Posted by rb1213 View Post

Hi guys,

I just did the Pot trick on my 50PK550
adjusting only the Set_up (full clockwise)

al I can say is WOW what a difference - almost Kuro Blacks !
and no IR anymore.


update: had to turn Set_up 3mm back & Vy to original status.
So do not touch this Vy one , I had red & yellow pixels showing.

I'd recommend putting the tv on a bright screen (checkerboard would be best) to do the adjustment
slowly turning Set_up till you get pixel misfires ifso go 1mm back .
before closing the tv, put it on a bright and dark screen to check pixel misfires
then turn tv off for 10min and turn it back on check again.
My problems started when the tv was cold.

I'll try it again later with th other DN and Vs pot's when i've got time.
Happy now with a small improvement , (although IR is back now :-( )
ps: I do put Brightness a bit up now (54) (was loosing some shadow details at 50)

Ciao

Did you measure the improvement, or it's just a subjective improvement?
(Got the 550, happy with it as is)
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