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Mitsubishi WD-82737 82" DLP TV - Page 4 Questions & Answers
Model WD-65734. Why is there no picture?
Never heard of a color wheel needing to be replaced. Both cooling fans need to be clean and turn easily. Color wheel fan needs to turn easily. If any one of these motors does not turn, the controller will cause a shut-down. The Xenon lamp uses high voltage to operate. If the power supply was damaged, the lamp won't light. The sparking on the ballast board indicates that dirt or dust may be causing the problem. Also, the clamping diodes and regulator may be defective. If possible, try replacing the lamp power board. Regards.
Fan stays on when tv is off
Not uncommon for the fan to stay on for a few minutes after the set is turned off. It is designed that way and then supposed to shut down after a few minutes. If it does not then that circuit is defective.
U can always throw a switch in series with the fan and shut fan off after you turn set off. Or if you wanna be fancy you can rig up a relay setup that will turn the fan on/off as you do with the tv.
How can I turn on?
press the power button onthe front. if nothing happens please post back with what indicator lights are flashing and how many times they flash. Be sure the lamp door is secure or it will not turn on.
Ballast to lamp connection cable melted on one side
The Ballast plug melted due to age of the TV. as the plastic gets old it gets brittle and can crack with barely any force. The pins then do not seat and the arc that should be in the lamp takes place in the connector. I have seen this so many times. fortunately it is very easy to replace the connector is you know how to use wire crimps and can source an old female plug. eBay is a good source. you can buy a used ballast from any model that has the same connector. Then cut off the new plug and splice it onto your old wires with but-crimps and shrink tubing.
Replacing uhp lamp and remove ballast with Xenon lamp and 55W ballast!
You are going to ruin the optics using a Xenon lamp. The ballast in the TV talks back via UART to the CPU. By removing the ballast the TV cannot talk to it and run itself properly. Also using a xenon lamp will give terrible color reproduction as its not putting out nearly enough lumens in the right spectrum. It will also bombard the color wheel and DLP chip with UV light and ruin those as well.
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