Question about Mitsubishi WS-48315 48" Rear Projection HDTV-Ready Television

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Problem with my big screen

I have a picture that seems to be concave. When it warms up it may then go back to flat. Is there something I can do to fix this?

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  • apr111 Nov 17, 2007

    I have something similar-On the edges of the screen the convergence seems off in addition to the concavity. It goes away after a little time. Sometimes flips back and forth. Some white lines show right before it goes back to normal. I think it goes back quicker if I turn the channel frequently

  • lennylen67 Apr 10, 2008

    Hi there, I have a Mitsubishi DT1080 projection TV. I just started giving me a concave image. Sometimes it will go away after a few minutes. Mostly it stays like that for a long time. Has anyone had this problem and how can I fix this?

    Thank you so much.



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I have had the same problem with my projection tv for a long time. I finally called a tv repair man and he told me that the converter is out of alignment and that I needed a new converter. It is costing me $360.00 to repair it. Let's hope it works.

Posted on Dec 29, 2008


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1 Answer

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I have the same problem. At first I thought the TV just needed some warming up because after a while it would resolve itself. Now, even after hours of being "resolved" it will occassionally revert back to the concave image! Have you gotten any feedback or resolution?

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Contact your local service rep as this sounds like a "not so easy fix' related to the main board or power supply (known issues with Mits boards, especially the capacitors). Cleaning, resetting, re-configuring will not likely make any difference. Verify the problem occurs across all input modes (such as DVD, etc). before taking any service actions.

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Your convergence chips have gone bad. If you are familiar with working on televisions, take the back off the set, discharge the flyback and disconnect the wires to the board and pull it out. On the board, you'll see 2 large metal heat sinks. Attached to them are the convergence chips (probably 2 of them). Unsolder them and replace with new ones. Mine cost $6 a piece + shipping. Be careful not to bend the legs while installing them. Also, you need to put something on the back of the chips to help dissipate heat. High temperature gasket sealer always worked for me. Do not attempt this fix if you are not comfortable working with high voltage. TVs, big or small, can kill you if you're not careful. Check youtube for a video on helped me. Just keep your search real general, i.e. "Convergence Chips". Good Luck!

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I had a Crummy Westinghouse TV that had a problem like this. JVC's are typically better built then a Westinghouse. My first educated guess - sounds like it's a voltage issue, most likely on the high voltage. Probably a capacitor on the power supply side of the motherboard or the capacitor in the flyback transformer. Just and educated guess.

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