Question about Panasonic PT-47WX53 47" Rear Projection HDTV
I have had a Panasonic PT-47WX53 rear projection HDTV for about four years now, and all has seemed fine up until this past week when I got a PS3 for Christmas. I only have DVI for a digital input on the TV. I had bought a $100 DVI-to-DVI cable about a year or so ago, to use with a Hi-Def cable-box at the time. However, my cable-service provider told me that they had not enabled the use of that output on their boxes, but I kept the cable anyhow in the hopes that that would change. It didn't.
Anyhow, somewhere in between then and now I also picked up a $20 DVI to HDMI adapter end for my expensive cable, to update it (as everything is now all HDMI, including the PS3) so I wouldn't simply LOSE the hundred bucks I had invested in it.
So when I got the PS3 last week, I set all the settings on both it and the TV (correctly, because I get picture and sound) for using the digital DVI cable with the HDMI adapter.
The problem is, after trying out a few Blu-Ray movies, I noticed a few horizontal "ghost" bars scrolling up my screen. They are not as noticeable when there is a bright image pictured on the screen (which is probably why I did not see them at first) but whenever the screen is predominantly darker, these bars are obnoxiously present. I checked some of the other inputs on the TV (antenna, component, etc.) and I DO notice a similar but far more faint image that I would almost never have seen if I had not been looking for it.
My question is threefold:
1. Is this a form of electromagnetic interference?
2. If not, then what is it?
3. How do I fix it (cuz it's bugging the crap out of me)?
I just unplug my cable line when playing my ps3 and the lines go away
Posted on Feb 28, 2008
This problem is called hum or more correctly 60Hz-120Hz Hum it is caused by a partially open or an open filter capacitor in the power supply of the TV. This filter capacitors job is to filter out the 60Hz - 120Hz ripple voltage that is present on the power supply's output. When this cap fails the hum bleeds into the various stages and causes the lines that you are seeing on the video screen. To troubleshoot this problem you will need a schematic diagram (to locate the power supply test points and to get pictures of the correct waveforms that should be present), a signal generator (to generate a reference signal), and an Oscilloscope (to view the waveforms at the test points). What you will be looking at are the outputs of the power supply checking to see the level of the ripple voltage present on the outputs.
If you do not have this equipment nor an background in electronics, I would suggest that you take the Tv to a qualified TV repair facility to have it repaired.
I hope this helps,
Posted on Jan 26, 2008
Change the resolution from 1080i to 720p, like uncheck the 1080i box dont even use it. only use the P ones 720p or 1080p.
Posted on Oct 21, 2008
Unplugging my cable box worked for me!
Posted on Jul 08, 2008
I am having a similar problem with a Hitachi HDTV rear projection, but when i disconnect the ps3, the lines are still there
Posted on Feb 07, 2008
Everything works better on component, I know the salesman at the store says its better, but its not....I tell customers all the time (I could hook up three tvs side by side..HDMI-DVI-Component and the human eye cannot tell the difference) The reason the DVI and Hdmi were created was for copy guard encription....Although the component is an analog signal, it goes to a A/D conversion..........But this is just my insane opinion...Good Luck
Posted on Jan 11, 2008
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