Question about Sony KP-46WT510 46" Rear Projection HDTV

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Three curved lines have appeared approx. 6" up from the bottom of the screen. Is this a simple fix .... maybe as simple as replacing a bulb?

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Re: Three curved lines have appeared approx. 6" up from...

Are you saying that the whole picture is gone and all you see on the screen are 3 curved lines near the bottom, or is the picture there but 3 curved lines are over the picture, or is the picture there but the bottom of the picture has curved upeards?

Posted on Aug 25, 2007

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I have a 57H84 toshiba I bought new in 2004 I have lines from top to bottom approx 1 in apart.I have been told that is the bulbs that need to be cleaned .Can you tell me how to get in to the bulbs and...

57h84 IS A REAR PROJECTION SET WITH 3 picture tubes.

you got lines in picture top to bottom on the screen running left to right?

They go away after a while?

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Getting a message that my lamp is nearing the end of it's life. I have 4 questions: 1. How long do you think I have until it will burn out. 2. Is there only 1 bulb/lamp that will need to be replaced. 3....

Hi, my same Sony KDF 50e2000 has been giving me the "proj lamp near end of life" message for approx 6 months-and we watch a lot of tv/play wii. I just ordered a repl lamp on line

Sep 01, 2010 | Sony KDF-50E2000 50" HDTV

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The picture looks 3D

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.



Here is a quick test....

Using your original remote go-to the settings menu then goto the convergence section.

Try to adjust the red and then the blue convergence.

You should be able to move RED and BLUE in all directions - up, down, left, and right. And you should be able to get the grid straight.

If you can't move them in all directions or cant move them far enough your convergence chips are bad and should be replaced. This is a common problem.

Note: If you TV has as flash focus or magic focus button only try pressing the button. If it fails to fix the convergence your need to fix it. See below for a fix


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

Oct 03, 2009 | RCA HD52W56 52" Rear Projection HDTV

1 Answer

Red and blue streaks across the screen top and bottom

The Convergence Amp IC's are bad. You should call a good TV Tech for this repair.

Jul 11, 2009 | Mitsubishi WS-65809 65" Rear Projection...

3 Answers

Panasonic PT-53WX54 curved bottom

its the problem of convergence in the unit that needs to be repaired
for how to repair please click the above link

Oct 06, 2008 | Panasonic PT-53WX54 53" Rear Projection...

2 Answers

Curved blue lines on screen.

You have a completely different problem. The screen voltage for the blue picture tube is slightly too high on your set. This will put fine lines in the background of the picture, called retrace lines. This is very common and easy to correct. Remove the front speaker cover and the access panel behind it. Look inside and you will see a black box with six controls, each control having a little white glue on it. This is the Focus/Screen block. Three controls are labeled Focus and three are labeled Screen. The screen control in the center is for green but I am not sure if the screen control on the left or right is for blue for your model. With the TV on, set it to VIDEO 1 but do not connect anything to the VIDEO 1 jacks. This will produce a pure dark picture, showing any faint lines in the background. Choose one of the screen controls and increase (turn clockwise) it slightly. If the blue lines do not get brighter it means you are turning the red screen control, so put it back where it was and choose the other screen control. When you find the blue screen control, decrease (turn counter-clockwise) it until just when the blue lines are gone. If you want you can check that the red and green screen controls are set to just below the point where their faint lines are visible. When done, replace the panels and your picture will be back to perfect.

Apr 11, 2008 | Sony KP-46WT510 46" Rear Projection HDTV

1 Answer

I have a big screen with three lines at bottom of screen

Likely to be the convergence power supply module. If you fix yourself it is simple provided you can get the module. Take the back off AFTER unplugging set The module is located above the main board on the left and the dynamic convergence board on the right. and come out by about 4 quarter inch nutdriver screws and has only two plugs one on each end of the module. You may find a good used one at your local tv shop or get them to order a new one or fix the existing module by changing the chip on it where the metal heat sink is. Chip number is STK 730-010 or STK 730-130. Either will work. Chip will usually fix it. If not the entire module must be replaced

Jan 01, 2008 | Proscan PS50670 50" Rear Projection...

1 Answer

Problem with picture and sound

A board (signal) bad ? or possible B board.....proof is by
substituion = can get expensive.................T.

Oct 13, 2007 | Sony KP-46WT510 46" Rear Projection HDTV

1 Answer

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.

Oct 08, 2007 | Panasonic PT-47WX49 47" Rear Projection...

1 Answer

Descending curved line on screen

if the tv has a portal on the side open it up and make sure the screen is not out of it's track, don't set anything on top of the set it could make it happen also

Apr 13, 2007 | Samsung HCN653W 65" Rear Projection...

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