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

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Curved blue lines on screen.

I have a similar problem and wondered if the same fix would help me. I have 5-6 blue, curved lines from top to bottom of screen about 2-3 inches apart. They can only be seen when the screen is dark or in a dark scene. Otherwise you can't notice it. Should I do anything since it does not appear to be affecting the picture quality? Or is it a prelude of things to come?

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  • mhuynh916 May 01, 2008

    Hi, I have the same problem except my tv is a different model. It is the Sony KP65ws700. The problem is as described "I have 5-6 blue, curved lines from top to bottom of screen about
    2-3 inches apart. They can only be seen when the screen is dark or in a
    dark scene. Otherwise you can't notice it. Should I do anything since
    it does not appear to be affecting the picture quality? Or is it a prelude of things to come?" I have not tried anything. I do not know where to start. convergence problem was fixed by a tech recently. Thank you for your help.

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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.

Posted on Apr 12, 2008

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MikeNJ1964 was exactly right! I have a Sony KP-65WV600 that had horizontal green lines that showed when the picture was darker. I had to remove 3 screws on the right and left side of the tv holding in the speakers...carefully pop out the middle panel from the clips holding it in....remove 4 screws from the cardboard in the middle and remove the cardboard. I then saw the six screws. The adjustment screws were the three below. I turned the middle screw until the lines dissapeared. I tried the left screw and blue lines appeared which I then adjusted away.
THANKS a bunch. SAVED me money!!!

Posted on Jul 04, 2008

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