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Question about Dwin TransVision 3 Plus Multimedia Projector

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Video then Black

I have a Dwin Transvision 3. While viewing video from any video source (cable or DVD) the projector light goes out, however, the projector keeps running. The only way to get video back is to turn off the projector, let it cycle down completely, then turn the projector back on. First it flashes green or blue, then goes out. This may happen 5 times in 10 minutes, or only once in an hour. DWIN has requested I send it back (no longer under warrantly) and they want big bucks just to look at it...any suggestions... Thank You -

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jasbo

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The colorwheel is going bad and needs replacing.

Posted on Aug 19, 2009

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I have a transvision 3 that starts up and runs fine. at some undetermined point the picture will flash back and forth from snow to the clear picture????

prestopete here...no kidding..I have the same problem...Can't find any cables. I do have a source for bulbs if you need.
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Have you considered checking the lamp? It could be going bad.
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Dwin lamp turns off

I design and implement switching power supplies for the commercial lighting industry. I also own a DWiN Transvision and have opened it and worked on it several times. I believe I can answer this question.

The DWIN projectors use a proprietary switching power supply to strike the lamp and keep it burning. The power supply is extremely sophisticated and maintains tight voltage and current tolerances. This is important because the halides in the lamp are damaged by power supply fluctuations. The halides can often be seen in an unfired lamp, they appear as small specks of dirt or tiny beads inside the lamp envelope. When a metal halide lamp is struck, the halides (which are rare earth elements) vaporize and cling to the inner wall of the lamp envelope. The mixture of halide gas in the lamp is what determines the color temperature of the lamp, as well as the accuracy of the lamp across the entire color spectrum.

One of the ways that DWIN is able to deliver such great color is because they use a lamp which delivers this great color across the spectrum, but, as I pointed out earlier, can be damaged by fluctuations.

The power supply contains three switching sections and five references for such things as input and output voltage for each psu section, as well as overcurrent demands from the lamp.

From my experience, your lamp(s) are all exhibiting issues that require replacement.
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