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

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Uh oh... the colors are curved and wacky

It looks like the three color guns (if that's what they are) have gone haywire. It was working okay, then suddenly the green, red and blue are curving in different directions. I tried the alignment setup but it doesn't work, because the problem isn't uniform throughout the screen; I've got a bulge in the lower left where the green curves upward, with the red and blue curving less so. They're also curving across the top. The only place the picture is fine is in the middle. Bottom left two-thirds have a big red swath, with graphics appearing double and triple. Is there any hope for fixing this, or should I just figure it's been a good 9 years and scrap it?

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Re: Uh oh... the colors are curved and wacky

Replace the amplifier IC chips for the convergence.  part # stk392-???  could be from 040 to 120..  90% chance that'll fix it.

Posted on Oct 20, 2007

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To much red color and very little green or none at all

you may have a dead or bad color gun. go thorough the convergence routine and see if all the colors are there. If your missing a color, you can purchase just that gun but I would advice that your replace all three. Be aware that this can be costly and in some cases you may have to purchase the whole pc board with the three color guns on it, depends on the model.

Mar 16, 2011 | Hitachi 43FDX15B 43" Rear Projection...

2 Answers

Projection HDTV Pansonic 47" Curving blue and green colors on top and bottom of screen.

You will need to replace your two convergence I.C.s.They are two large IC mounted on a large aluminum heat sink.Replace both,look for any burned resistors near them,replace those if needed,and readjust your convergence. Good Luck

Let me know if you need any further help

Mar 29, 2008 | Panasonic PT-47WX42 47" Rear Projection...

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My samsung hcn4226wxixaa screen is yellow i do not know what happened any suggestions???

one or two of your color guns have gone bad, or the circut that drives the has. There are three guns, red, green and blue. you need all three to produce all the colors, including white and black. in most cases this is not a cost effective repair, unless you have an extended warranty. if it is a sears device, or you bought it from them, they will sell you a warranty to for 200 dollars and then you can get it fixed. you might want to consider getting a new tv

Mar 10, 2011 | Samsung HCN4226W 42" Rear Projection...

3 Answers

My Akai projection tv the color has bad color and double vision. Why?

If you have an older model projection set then the Convergence Ic's have gone bad. This type of repair usually cost around $250.00 to repair and can be done in the home by a technician.

Dec 27, 2010 | Akai Projection Televisions

1 Answer

Hey there recently my screen just went haywire and i am seeing double and the second picture is red in colour,also the bottom of the screen is curved....what causes this and is it worth fixing?

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 photos of convergence problems




You can see some more examples and find a fix using this link on Fixya - CLICK HERE

Aug 23, 2010 | Hitachi 50UX57B 50" Rear Projection...

1 Answer

Converging problem

This is a rear projection TV that uses three color "guns" in a cathode ray tube . They are no longer converging at the screen. The convergence problem is usually a sign of something else gone wrong with the high voltage.
Do NOT attempt to open this set yourself. This type of TV can have LETHAL voltages inside for WEEKS after it is unplugged. The repair and convergence calibration will require a qualified service technician.

Jan 09, 2010 | RCA HD52W59 HDTV Projection Television

1 Answer

JVC AV-56WP74 Colors quit working or went out of balance.

Guns or CRT are probably ok. Your TV needs a convergence IC STK392-120 replacement. Lamp are used on LCD and DLP rear projection TV's. Color wheel are for DLP's. :)

Dec 26, 2009 | JVC Projection Televisions

5 Answers

KP51ws500 turns green and shuts itslelf off

There may be several causes but, one is that when any color gun is being over driven, the Sony shuts down the gun to protect it. Try this. Remove the front of the set by removing the two screws from each lower corner. Next remove the black panel held on by 5 or 6 screws. Now you should see a panel with 6 potentiometers on it. Turning the ones on the bottom row CCW reduces the drive. Turn the color down and if all the guns stay lit, SLOWLY turn them up until you get the color balance that you like.

May 02, 2008 | Sony KP-51WS500 51" Rear Projection...

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