Question about Sony KP-43T90 43" Rear Projection Television

1 Answer

Double image on my Sony KP 43t90

My tv started getting a double image. The double image has a red hue to it. Any suggestions on what might be causing this? I bought the tv in 2001 and this is the first problem it has had.

Posted by on

  • Anonymous Apr 01, 2009

    I have exactly the same problem. I tried to reset default values entering on service mode (I had the service manual), but it still having the problem. It might be the proyection tubes. If anyone knows how to solve it please post a comment. Thanks a lot.

×

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Sony Master
  • 3,459 Answers

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 projeciton 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.

double image on my Sony KP 43t90 - 42d3683.jpg

7859b01.jpg

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 todouble image on my Sony KP 43t90 - 69189a5.pnge below for a fix

69189a5.pngCONVERGENCE SOLUTION

You will need to replace the convergence chips and possibly some convergence resistors and pico fuses.
This is a a fairly easy DIY job if you are handy and can follow directions. You can get complete repair kits from TvRepairKits.com or click here. They have put together DIY repair kits that include the OEM parts and step by step photo instructions for each repair. If you are not handy or can't follow directions we would suggest calling a shop.

Posted on Jul 03, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Double image on my Sony KP 43t90


Your TV most likely has one of two possible problems.

Problem #1: Convergence Chip Failure ( common problem )

Here are some of the most common symptoms and example photos of a convergence problem
  • 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.
701cb04.jpg
77ea520.jpg
f0900cb.jpg
Here is a quick test....

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

Try to adjust the red and then the blue convergence.



You should be able to move them up, down, left, and right.

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

2c07611.pngSolution #1

You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com. They have put together a kits for most models. If you don't see a kit for your set send them a quick note and they will put one together for you. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, etc.


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.

578ba6c.jpg
TV set after fluid change

65af323.jpg

2c07611.pngSolution #2


What you will need to do is replace the coolant and clean the crt. You can get a repair kit from www.TvRepairKits.com that includes replacement coolant, photos. instructions, etc

Dec 20, 2010 | Sony KP-43T90 43" Rear Projection...

1 Answer

Double image with mixture of color red and blue


There are 2 convergence IC's that will go out over time that will need to be replaced. There may be a pico fuse and possibly some resistors that will have to be changed as well. There has to be quite a bit of testing done before hand, and quite a bit of setup afterwards so you may want to hire a technician to do it. Our shop gets around $250 - $300 to do a convergence job like this one.

Jul 30, 2010 | Sony KP-43T90 43" Rear Projection...

1 Answer

Double vision on a sony kp-43t90?


you likly have a convergence problem (is that a crt projection TV?)

Sep 18, 2009 | Sony KP-43T90 43" Rear Projection...

1 Answer

Hue red on a double image


lots! the convergence chip and some capacitors are involved as well as some tuning inside the set. The projected cost is about $300 to $500 depending on travel distance and the company you use So contact a Sony se4rvice centre and get an aproximate quote

Please rate our help to keep the FREE service online++++Thanks for using FIXYA

Sep 07, 2009 | Sony KP-43T90 43" Rear Projection...

1 Answer

Television is out of whack


Convergence chips are bad. Goto www.TvRepairKits.com to get a repair kit

Jan 20, 2009 | Sony KP-43T90 43" Rear Projection...

1 Answer

Sony KP 43T90 Projection TV - use headphone


so u bought red white femail rca cables to mini sterio jack or bigger headphone style make sure tvs menu shows outoput on audio out on if u have option should be all it needs turn tv up after

Oct 06, 2008 | Sony KP-43T90 43" Rear Projection...

1 Answer

Red hue on TV


I have the same problem. Researching a replacement lamp. After 5 years the lapms expire and it is the most likely failure. Confirm with a local service person using the Sony website to locate a service center.

Replacent in not difficult but the bulbs are >$200. Cheaper than a new TV.

Jul 09, 2008 | Sony KP-46WT500 46" Rear Projection...

1 Answer

Sony tv


The issue is most likely a bad bulb. If the light that you are getting is flashing red than most likely it is a bad lamp. If this is the case you are looking at probably $200-350 dollars.

May 10, 2008 | Sony KP-43T90 43" Rear Projection...

1 Answer

GHOST IMAGE ON KP-43T90


this problem is caused by the pal 50 - 60 meg problem, the sony runs at 50 megs, if you have a 60 input from an hdmi lead you will get ghosting

Mar 05, 2008 | Sony KP-43T90 43" Rear Projection...

1 Answer

Color distortion


There are failures occuring in the scann and convergence circuits. This may not be feasible to service.

Jerry G.

Dec 14, 2007 | Sony KP-43T90 43" Rear Projection...

Not finding what you are looking for?
Sony KP-43T90 43" Rear Projection Television Logo

738 people viewed this question

Ask a Question

Usually answered in minutes!

Top Sony Projection Televisions Experts

Steve Sweetleaf
Steve Sweetleaf

Level 3 Expert

1128 Answers

Ap12
Ap12

Level 2 Expert

103 Answers

Jason Harris
Jason Harris

Level 2 Expert

256 Answers

Are you a Sony Projection Television Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...