I am having A problem with A JVC pd42wx84 42in hd plasma and I have A really bad screen door affect on the plasma when watching A dish network dvr and an out board hd tuner they both look like crap all the shadow lines are visible and look digital. Has anyone Had this problem or solved it?

Oh yeah the dvd looks A little better but still is realy gritty and stuff.

Have you tried calibrating it using Digital Video Essentials or Avia test disk? Also how do you have these components hooked up? What cables are you using? Did it look this way at the place you bought it?

More info would be helpful.

DVE and AVIA have little effect I have found on PDP or any new technology displays. Judging by its resolution I would say it is Pioneer glass so the panel is good. Two things to check, make sure the resolution that you have selected out of your satellite is set to 1080i, in many of my installs I have noticed this is required for good picture. Also this is JVCs first plasma, thier on board processing maybe in the dumps since they have not worked with the technology before.

Also make sure you are connected with component video cables and not DVi or HDMI, sometimes I have seen the image to look to digital with these connections on a few setups.

at what distance are you viewing the set?

What input are you using? Set to what resolution? Does this happen on more than one input?

I have seen this on a Sony digital RPTV, two generations ago, but only on the NTSC input. It seemed that Sony did not pay attention to how bad the NTSC input would look; the same signal, upconverted to 480i component, looked okay on the component inputs, and 480p looked even better. When I had a cable guy and the factory service person out, both of them saw the screen door and both of them said that was what they have come to expect on those televisions. The factory guy was able to locate a particular shade of gray, full screen, that made the screen door REALLY obvious.

There was no adjustment for it.

I have heard that the newer units do not have this, but I have not gone looking for it.

-The Sat is hooked up with cheap component cables to the plasma's set top box.

-Not sure what input number its on but its for sure on A component input.

-It doesn't seem to matter much weather its on hd or sd sat its crap!

I didn't install it but I've done all most common trouble shooting stuff.

so yes I've tried to adjust using ve disc.

it sucks because it a long distance customer(about 5 hours drive) and I need figure out some ideas before I go down there again.

and yes I've also called jvc tech support and they all have their thumbs in A BAD PLACE.


This message was edited by killing switch on 03/25/05 12:46 ET.

You should have the output of whatever boxes that you are using set up to input into the display at the closest to it's native resolution. For example, you should set up the HD Sat to output in 720p, not 1080i. If it is set at 1080i, the box is upconverting everything to 1080i, then the TV is resampling everything back to 720p. You get two conversions, and you amplify all the crap.

It looks like that TV has some sort of DIST setting, make sure that this is turned off. Make surethat the color setting is 6500k, and re-adjust the contrast, brightness, and sharpness and color.

Get the picture to the TV with the least amount of processing and see how it looks.

What kind of external HD box are you using? What kind of DVD player? How are they set up? Are all of your boxes set up for a 16:9 TV, or is the TV having to stretch everything?

Some of the things to look at.

John

I have recently found out that this condition is called false contouring or the tech term is Posterization or Solarization but never the less, it's A problem with plasma's. But it's not supposed to be this bad so it looks like it might be the plasma, but still if anybody knows anyhthing more that I. Let me know.

are you experiencing this at viwing distances (+7 feet) or 2 inches away?

Might some kind soul define for me screen door effect? Is it the sort of pixelization that occasionally ocurs on the display where the picture becomes blootchy? Or is it some other effect?

These terms are sometimes confused. As you know, all digital displays (DLP, LCD etc.) are composed of pixels. Generally speaking, screen door refers to being able to clearly see the outlines of those pixels, in other words, it's like looking through a screen door. The ability to see screen door is due to several factors:

1. Fill factor, also known as aperature ratio. LCD typically has the worst fill factor, something like 60%. DLP has around 90% and DILA 95%. These are ROUGH numbers and can vary slightly depending on the actual chip model etc. Anyhow, screen door can most easily be seen on LCD because of the lower fill factor. Depending on viewing distance, many people can see it on DLP from less than 1.5 times viewing width (at least with the current crop of 1280 x 720 DLP). Most people cannot perceive screen door on DILA at all (typically 1368 x 1025), even at 1 time viewing width and in fact on the 1920 x 1080 DILA you need to get within a couple feet of a 10' screen to be able to see the pixels.

2. Resolution also affects the ability to see screen door. Assuming the same viewing distance, you are going to be able to see pixels more easily on an 800 x 600 DLP versus a 1280 x 720 DLP.

3. Last but not least, viewing distance as mentioned affects when you can see screen door.

Based on the origial posters description, I DON'T think he is actually seeing screen door, but rather some type of defect he is describing as screen door.

I don't know about that.

The few plasmas I've ISF'd were pushing 1,400 DK out of the box.

Is 1400 what you meant to type?

.

Huhh?

That's what I just said ;-).