Question about Panasonic PT-47WX49 47" Rear Projection Television

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Our tv suddenly began showing what looks like a rainbow on the bottom third of the screen (last evening). Tonight, it is even more pronounced. What's going on?

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  • dwbuechler Jan 28, 2009

    The advice was right on the mark, My husband replaced the ICs with the help of Sonny from the servicemanuals.vstore site. Our tv actually seems to have an even better picture than before. Thank you so very much for the help!

  • jfever Feb 01, 2009

    I have a PANASONIC PT-51G45CU rear projection tv...made in 1997. I would like to fix it, but don't want to put alot of money into it. If I could fix it myself, it would be great. The tv has a blue wave across bottom third of it, kinda looks like you have 3d glasses on. You can still see the whole picture on the screen all the way around, just bottom part has that blueish wave through it. Don't know what is wrong with it, could someone please help...thanks..John.

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  • Panasonic Master
  • 8,617 Answers

You need to replace the convergence ICs they are both STK392-110 you can get replacement ICs at the following link and they provide free installation instructions.
http://servicemanuals.vstore.ca/

Posted on Jan 19, 2009

  • Sonny Berry
    Sonny Berry Jan 28, 2009

    Glad that I could help, I try to recommend servicemanuals.vstore all I can as they really go out of there way to help their customers which is very rare theses days. Congratulations on a job well done.

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The picture can be seen, but it seems to have a rainbow aura and looks concaved...although the screen is not warped in any way...it was working perfectly last night...turned it on this morning, and we were...


Projection TV sets have two very common problems. One is convergence ( 3D/Warped video) the other is CRT fluid ( Dull Video). Here are more details and solutions for both. Repair kits with instructions are also avail from www.TvRepairKits.com

Common Problem #1) Convergence has gone out

Projection TV sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the video to look normal. When its out of alignment the video will look 3D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the TV menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired.

This is a very common failure on these projection sets and a fairly simple DIY fix. All projection sets including Samsung, RCA, Sony, Philip Magnavox, Panasonic, Pioneer, Akai, GE, JVC, Toshiba, and others at some point will have the same problem.

Common Symptoms include....

  • Screen looks 3D
  • Colors don't line up
  • One or more colors can't be adjusted when using the convergence menu.
  • Screen is bowed or warped.
  • TV shuts off after powering on. Power light will blink. TV may also make a chirping noise.
Here are some pics of convergence problems.


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69189a5.pngSOLUTION #1

For more more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Common Problem #2) CRT Fluid is Cloudy

Projection TV tubes have a liquid coolant that is used to keep them from overheating. After many years the coolant in the blue and green tubes will become cloudy and cause the screen to look dull, red/orange, etc. You may even see halos around images.

Picture of a set that needs the fluid changed.

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TV set after fluid change

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69189a5.pngSOLUTION

You can see some more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Mar 05, 2011 | Sony KP-65WS500 65" Rear Projection...

1 Answer

65" Mitsubishi TV


cannot get any sound at all from tv

Jan 28, 2010 | Mitsubishi WT-46805 46" Rear Projection...

1 Answer

The screen has a rainbow of red blue and green on bottom


The specs say this is a CRT type projection system, so it could be related to the display or to the TV. Since this has an SD card, it might be good to plug in the memory card with some pictures on it, and see if the problem persists with a source other than the tuner. That might at least narrow down whether you have a display failure/adjustment issue or something else.

Jul 04, 2009 | Panasonic PT-56TWD63 56 in. Rear...

1 Answer

Rainbow colours on the screen


The projector is starting to go out in it. Depending on your financial situation, you can take it to a shop to have it looked at, or replace the TV. Depending on how long this has been happening, the Pioneer projectors usually last about 100 hours once this happens before they burn out completely.

Apr 30, 2009 | Pioneer SD-P50A5-K 50" Rear Projection...

1 Answer

Horizontal color line across the screen


Most likely a bad Vertical IC or bad connections on the vertical IC. don't continue trying it on. If you have a bad connection it could do more damage. You also could damage the CRT ( picture tube ). If you remove the cover and look at the bottom side of the PC bord with a good magnifiing glass you may see what looks like rings around the leads comming from the Vertical IC. The Vertical IC is mounted on a heat sink usually towards the front of the set looking from back. If you do see the rings around the leads try reheating with a solder iron. If this dosen't fix you most likely need a new IC.

Apr 15, 2009 | Projection Televisions

2 Answers

Rainbow effect at top of screen


This is a convergence problem that can be as simple as poor solder connections on the pins of the convergence ICs or defective ICs. If you wish to attemp the repair yourself, please let me know and I'll look up the parts and provide additional details and instructions. Also, please confirm your model number.

Thanks,

Dan

Feb 18, 2009 | Samsung HLN617W 61" Rear Projection HDTV

2 Answers

Rainbow on the screen


Do you have any larger speakers close to you tv. Or any magnets been neer it. If you unplug it for a while the tv should have remove the rainbow

Aug 28, 2008 | Panasonic PT-53TW53 53" Rear Projection...

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