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

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The colors on my tv are seperated you see double of everything . one blue on red. was this done by a magnet or some other problem

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This is a set first made in 2001---if colors are skewed and will not adjust in the customer mode (convergence) you have a convergence circuit problem.

This set uses two of the STK-392-150 convergence IC chips--both need to be replaced and the set adjusted. Sometimes there will be either a fuse or resistor around them that is bad--for the most part just both chips need to be replaced.

Most shops get 300 or more for this repair but you can buy a pair of chips on EBAY for under 14 dollars plus shipping.

If you or someone you know can do it I can tell you everything you will need to do it and give general instructions on how to get at the chips and replace them.

Here is a picture of a similar model with the same problem:

the colors on my tv are seperated you see double - a5a0f2c.jpg Not all sets with this problem look exactly the same.

This photo was provided to me by a customer who I repaired the set for and shows a typical convergence problem in this type of TV.

If this information has helped you rate this solution as I do this here for free.

If you want to know where to get the parts and also what is needed for the repair---let me know and I will post the needed items first and the instructions also.

SD TECH

Posted on Dec 10, 2009

  • willimorris7 Sep 11, 2011

    This information is helpful. My email address is Willimorris7@aol.com. I think we do need the bulbs that you mentioned. Thank you for the help that you provide us with.

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1 Answer

I have a Sony KDP-57WS550 TV that has a convergence problem. Based on the symptoms, I'm not sure whether to indict the convergence ICs. In the convergence mode, I can move the red (and blue) crosses,...


With your TV in setup Use a small magnet to "move" the non converged Red, Blue, or, Green color lines "crosses" (each CRT will need to be adjusted in turn) by moving the magnet close to the offending Red, Blue or,Green color CRT yoke or, tube while observing the movement of the CRT color line "cross" in a mirror ( try several places near the tube and, several strengths of magnets:) a refrigerator sheet magnet works well (you can cut these with a scissors to make a better fit or, apply less magnetic "pull." by making them smaller (you may need more than one magnet per tube to fix each CRT's convergence) When you have each CRT tube's convergence right, apply some clear silicone adhesive to the magnet and, permanently affix the magnet to the now "fixed" CRT tube exactly where you placed the magnet to obtain the best convergence on the CRT.
(Do not adjust the "Green" CRT unless you must, as it is used as the color line to adjust other lines to)

Jun 30, 2011 | Sony Grand WEGA KDP-57WS550 57" Rear...

1 Answer

At times the screen becomes double


When you say "double" do you mean you see the colors somewhat seperated or see maybe blue or red outlines around objects? Does the screen distort?

If so then:
Your Convergence ICs are likely failing or it is a bad solder joint related to that area. It is very common on rear projections. The solution is to replace the STK chips, check fuses and the resistors next to the STK chips. Replace as necessary and re-align via the service menu. It is about a $300 repair at a tv service center. You will need the service manual if you decide to do this yourself.

Try This:
When you notice the symptons Use this simple test to verify.
Go to the users menu on the tv.
Look for the converge option probably under setup or video setting. Converge is short for convergence to align the red and blue colors to the green color.

If you cannot move the red either horizontal or vertical, then the STK chip has failed for red section.
If you cannot move the blue either horizontal or vertical, then the STK chip has failed for the blue section.

If you can move both in each direction then the problem is something else.


Note if one STK chip fails, you replace both regardless. There may only be one STK chip in this set. If there are two, they will be right next to each other.

Feb 20, 2011 | Mitsubishi WS-55857 55" Rear Projection...

1 Answer

The color has seperated into blue, red, green and picture is curved and makes it seem like I' seeing double


Ur tv convergence are dead.U know how to solders?Must replaced 2 STK convergence ICS,some or all it resistors.Tries websites Tv repair world.com,Tvrepairkits.com to buy a convergence kit to repair it ur self.The shop will cost u $300-350 for parts and labors.

Apr 10, 2010 | RCA R52WH73 Projection Television

2 Answers

COLOR PROBLEM


you have a miss aligned convergence. try to aligned it first.

Aug 06, 2009 | Philips 55PP9363 55" Rear Projection...

1 Answer

Color seperation and red drooping line


You have defective Convergence IC's. It's best to have a service company verify and do the repair if you wish. Normally runs about $250.00

Jul 14, 2009 | Zenith R45W46 45" Rear Projection...

1 Answer

Loss of color after lightning storm


In tradition televisions, each color has its own gun, convergence and control circuit. One or more of these are most likely bad. Repairs on standard CRT TVs nowadays are usually cost prohibitive.

Jun 09, 2008 | Televison & Video

1 Answer

Jvc


I have the same problem on my tv - the colors are seperated - the picture is blury and in converge mode the colors will not line up.
Need to know if I need to go and buy a new flat screen tv.
Any advise is appreciated. Thanks


May 25, 2008 | JVC AV-56WP74 56" Rear Projection...

1 Answer

TV PROBLEMS


If the images are different colors (red,green,blue) then the convergence has diverged. Some TV allow re-convergence through the menu screen, older sets my need to be physically adjusted (aimed) to clear this up. a strong knock to the TV may have cause this.

Apr 21, 2008 | JVC AV-56WP74 56" Rear Projection...

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