Picture becomes unstable after turning it on (lack of color,
Unclear, flashes). Turn it off and then start again in 5 minutes & is OK for about 10 min. & then problem occurs again. It used to stay OK for about 1 hour, but now it occurs on a shorter time span each time you restart it.
Re: Picture becomes unstable after turning it on (lack of...
The problem is with overheating!. after a few years the fans accumulate dust and "stuff" and don't work as well. Get a can of compressed air and blow out all the ports and fans. I take the cover off and with everything cool, I blow out all the internal fans also. The 3 big fans on the back are easy to remove and clean and get spinning again. Usually this fixes the issue for several months but eventually, professional cleaning may be needed at DWIN.
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1,the color starts to go out, it become the white and black,the color is disappear.
2,then,the projector running off after only a few minutes,
it is a general issue:the inductor need to be cleaned
Use a cotton swab moistened with alcohol to clean the inductor.
the inductor (Sensing element),is near to the Color Wheel.
the industor : is a black little element,as little as 3 sesame seeds
any questions, feel free to contact me
have a nice day!
1,the fans is good , is ok
there is not an overheating situation ,only 5-10 minutes,
2,seems that the lamp ballast is defective
you need a new lamp ballast, unit price is USD80
Have a good day!
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This is how my problem with the power not going on started. I cleaned mine and it was running much better. I decided to give it a good cleaning, but now the power won't turn on. Try at your own risk as this could happen to you as well. Just a note, I have had mine for 4 yrs with the same bulb, just over 6000 hrs. I was lucky until now.
Check the cables connected to the back of the projector. reinsert the cables a few times to get a good contact. Jiggle the connection at the projector to see if there is a bad connection, do this while viewing the image on the screen. If everything is good and no response to the connections, It might be the main/input board is bad and will need replacement.
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.
the colorwheel is going bad and needs replacing. the colorwheel needs to spin fast enough to sync up with the dmd chip. if it cannot, the pic goes bad then off. the flashing is the colorwheel trying to catch up.