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

Image is totally distorted

I have a Sony KP-51HW40 TV that is about 5 years old. Couple weeks ago, the image shown on the screen suddenly becomes out of shape. All three colors are out of alignment and the image is bended at the center - almost like a picture squeezed from top to bottom in the middle so that the top edge of the picture is bended down and the bottom edge of the picture is bended up. I read some articles on the net and thought it might be due to the convergence IC (STK392-560) got broken. I replaced the ICs (two of them), but the problem is still there. It would be greatly appreciated if you could provide some help.

haoye shen Jul 29, 2007

The attached is what the image looks like

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1,139 Answers

Did you also replace the bias resistors required when you converted from STK392-110 to the higher STK392-xxx modules? If I wer you I would go back to the orginal modules only new ones. Then I would also get a schematic to test the voltage levels on the chips to make sure they are the same as on the schematic.

Posted on Sep 09, 2007

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You will need the service manual to locate the blown resistors and or the circuit protectors in this TV set. If you know how to read the service manual, the schematic, and trace the circuit, know how to use and ohm meter and a volt meter, I am sure we can fix this set together. Let me know with an e-mail address so I can save you 30 bucks for the service manual. Good Luck

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I HAVE A SONY KP 57 LARGE SCREEN PROJECTION TV. THE PROBLEM I AM CURRENTLY HAVING: (1) ABOUT EVERY HALF HOUR THE PICTURE WILL GO AWAY AND DIFFERENT COLORED LINES WILL SHOW ACROSS ENTIRE SCREEN DIAGNOLLY....

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Image is totally distorted

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I HAVE A SONY KP 57 LARGE SCREEN PROJECTION TV. THE PROBLEM I AM CURRENTLY HAVING: (1) ABOUT EVERY HALF HOUR THE PICTURE WILL GO AWAY AND DIFFERENT COLORED LINES WILL SHOW ACROSS ENTIRE SCREEN DIAGNOLLY....

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KP-51HW40 51" Rear Projection Television

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