One of the fans will not start without making a noise, the noise lasts about a minute then stops, now the lite won't come on.
Have not been able to get a response from Dwin are there other ways to repair?
I had a similar problem and it turned out to just need a good clean. The fans can pull in a lot of dust and eventually this causes intermittant starting problems/noise. I attacked mine with compressed air and a vacuum cleaner and this completely fixed the problem. Try to control where the dust goes you want to avoid just blasting it inside the unit and on the lense, bulb, etc
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honestly it sounds as if a capasitor is overheating and once it overheats the machine is shutting off.... I myself would be able to look at it and see if this was correct or not. i am not sure how familliar you are with these types of things, probably best to take it in and tell them exactly what is wrong...
Turn off all power. Pull the cover off and lay it upside down so that you can reach the fan. Then turn the unit on and try spinning the fan blade with your hand while it trys to turn and makes the noise you observed. If it is seizing up or very difficult to turn by hand, the bearings are bad on your motor and the motor will need to be replaced. You might be able to lubricate the motor and buy a little bit of time but expect to have problems in the near future.
IF the motor does not seize up and starts spinning without resistance and runs for several minutes or so, you may have a failed capacitor.
believe it or not, most noises that start and end and start again are sometimes very easy to fix. next time you hear it open the refrigerator doorand see if your ears can pick up the sound. usually it is two bottles in the panel of the door vibrating against each other. if not thencheck your fans especially the condenser fan next to th compressor, something may be caught in the fan blade. unplug unit if you find noise and give the coils a good cleaning while you are down there anyway. let us knowhow you did
It is most likely your circulation fan in the freezer. Normally the fan stops when you open the door. It is a normal operation. Check to make sure that the fan is not blocked by frozen items or that the fan doesn't have an ice build up. On some models the fans stops when you open the door and starts a few minutes later after you close the door.
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.
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.