Question about Mitsubishi WT-42313 42" Rear Projection HDTV-Ready Television

1 Answer

Redness in picture

Im getting a red vertical line on the left side of the picture and a red blurr across the picture that causes red ghost images? If i turn the TV off for a bit it returns to normal, but only last about 4-5 minutes before turning red again. what should I do?

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  • Hater Dec 08, 2007

    is this the only possible answer?

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The Convergence amps in this TV set will need to be replaced. This is a typical repair that has to be repaired in almost every tube type projection TV set ever made. Not really a hard job, but a knowledge of printed circuit boards and soldering will be needed and if you do not have the soldering and unsoldering skills, leave the repair to a pro. A repair such as this will run anywhere from 225 up yp 400 bucks. Good Luck and let us know how this repair worked out for you.

Posted on Dec 08, 2007

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  • Soulvisitor
    Soulvisitor Dec 08, 2007

    I think so, in your menu I think you can bring up a grid ie advanced settings convergence



    look at this link

  • Soulvisitor
    Soulvisitor Dec 08, 2007

    My 46805 was having problems with the Red vertical convergence giving out, and it turned out to be the solder connections on the vertical convergence amplifier (stk392-570). My advice to anyone seeing similar effects on this or other mitsubishi models using the same or similar circuit-boards, is to try this fix. It's worked great for me. And we probably only took three or four hours to do it despite having to open the TV up three times. In the process, I learned some things and would like to share them here. Specifically, it's possible to fix things with much less disassembly and reassembly than we did most of the time. So I'm going to outline my recommended process below in hopes that it is helpful to others who might be seeing the same problem. We only used a screw driver and a soldering iron. No other tools were needed. Obviously this should only be attempted by someone who is familiar with how to solder pretty well.

    Specifically, I would advise opening the case of the TV in accordance with the instructions in the service manual (which can be generally be bought for like $30 or so on-line, but to summarize is essentially, unscrew a lot of things until the light box (the part with the circuit boards and the guns)). If you have my same model of TV, there are also three screws in the plastic at the back of the circuit board area that aren't mentioned in the service manual. They may also be present and not mentioned for other models.

    Then, you can tip the light box up (making sure that there is no weight on any part of things other than the wooden box, you -do not- want to put any weight on any of the components) so that you can see the underside. Then you can locate where the convergence amplifiers are by looking for where the large heat sink on the top side and figuring out where it is on the bottom. The one which amplifies the vertical convergence is the one on the left when viewed from the top from the back of the television.

    Then you can examine the solder on the wires there, especially on the high numbered pins. The highest three are the amplified output signal and the several ones below that are various power inputs (24V and 34V positive and negative lines for the different channels). The power and the amplified signals are much higher voltage and amperage than the input signals, so those solder joints are more likely to have problems if they were not soldered quite right to begin with.

    In my case, some of them were sort of burned out looking and a couple of others had cracks in the solder which were preventing a good connection. So, look for that sort of thing. Assuming you find some, go ahead and resolder them. I advise erring on the side of more solder (and hence lower resistence and hopefully less heat) so long as you make sure not to solder any of the pins together. There are several of the pins which actually are wired to the same source, but they aren't adjacent (which is too bad since it would make guaranteeing a soldering which would stay together under heavy load).

    LINK to post simular probs

  • Soulvisitor
    Soulvisitor Dec 08, 2007

    Are you cool with hivolts and up to pulling this thing apart and solering?

  • Soulvisitor
    Soulvisitor Dec 08, 2007

    soldering

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