Question about Sony KP-51HW40 51" Rear Projection Television

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I have a sony rear projection, I moved it from house to house, now the colors are separated, you can see the red the green and blue appart, what could have happened?

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Rear projection TV has convergence section to converge / merge all 3 CRTs picture into one picture and when this section gets some problem, TV does not show correct picture.
You need to check D board that has convergence circuit and output ICs and in my opinion there are few cold/ dry solder joints on same D Board, find and re-solder them to solve TV problem.
If you have no experience of TV repair, call local TV tech.
Thanks.

Posted on Sep 12, 2009

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Posted on Jan 02, 2017

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Sony model #kp51ws500. Common problems for screen appearing warped


Need more details about how the screen is appearing warped.

if you have color separation and distorted image (warped,bowed, etc), then your Convergence ICs have failed. 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.


Note: The STK chips are black about 3 inches long and will be mounted against a large aluminum heat sink (metal fins). They have about 20 pins on them. I believe they are STK392-560s in that set.

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1 Answer

Projector Alignment


You need to replace 2 convergence IC and picofuse :)

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3 Answers

Blue red and green lines thorugh 1997 Sony 50" rear projection


Confirmed Hitachi subs all STK392-110,120 and 150 to
STK394-160 ....I use Hitachi part number CZ 01341 = no re-calls
..................T.

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1 Answer

Convergence and picture problem.


convergence ic's
http://www.techlore.com/blog/entry/19694/Sony-Convergence-Repair-My-Sony-TV-has-a-distorted-picture-/

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Sony TV KP-46WT500, 46" Rear Projection TV , colors mixed up


You have a pair of Bad STK392-560. replacing these will definitely fix the set.
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Best regards
CircuitCity

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2 Answers

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Sounds like a convergence issue. Call Sony for an ASC that can come out and give you an estimate. You are probably looking at $200-400 to do the repair.

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Color distortion issues


http://www.somelifeblog.com/2007/06/sony-projection-tv-red-line-repair.html

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Sounds like the green is out of focus. If the focus control for the green does not control it enough to make the width the same as the red, then, the lens on top of the green can be adjusted to focus that tube. On the lens, there is a wing nut on a screw to loosen it and move the lens left or right a bit to help with the focus. Hope this helps.

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