Question about Mitsubishi WD-52525 52" Rear Projection HDTV

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Mitsubishi 52725 52525 Red Light turns on

When I power up my 52725 everything appears normal. The fans start and the bulb turns on. The sound comes on then the picture comes on. After a few seconds the set shuts off and the red light is on constant. Prior to this situation the set would not come on. We would unplug and try it again. Most often it would start up and be OK. As a point of reference I swapped out the bulb, no change. I swapped out the power supply board, no change. I swapped out the entire main chassis, no change. I would have swapped out the lamp ballast but I don't have one. Is it possible my problem might be the ballast? Any other suggestions would be appreciated. Thanks for any help.

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  • ken_lucas Apr 19, 2009

    I have a complete light engine still in the box. What does the thermal sensor look like and is it removable from the unit?

  • ken_lucas Apr 19, 2009

    Thanks for the suggestion. I appreciate your help. I found the sensor. Removed it from the new light engine and installed it. I have the same result. The set powers on, sound comes on, the screen stays on for only a few seconds then goes off. The "lamp" indicator lights solid red.

  • ken_lucas Apr 20, 2009

    I was able to read the blinking light code. It appears to be 3 4
    I checked my service manual and I believe it is "lamp abnormality". It is real puzzling to me. I'm more determined than ever to find a fix for our set. There is a big void in our family room where the TV used to be.



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The problem might be the thermal sensor on the light engine. with all the work you have done on this i would suggest taking a look at the thermal sensor. these are known to go out.

Posted on Apr 19, 2009

  • 1 more comment 
  • ZaneD
    ZaneD Apr 19, 2009

    The thermal sensor is on the back of the light box. it is a white rectangle part. If you remove the small screw and pull it up it will come right out. very easy to change.

  • ZaneD
    ZaneD Apr 19, 2009

    when that happens press and hold the menu and device buttons at the same time. the lights will start blinking. what is the blink code?

    it will blink like 2 times and then 3 times and that will be the code.

  • ZaneD
    ZaneD Apr 20, 2009

    the other thing that it would be on an error 34 would be the light engine itself. if you have one change it out. you might be missing what mitsubishi calls the lamp enable signal. the lamp will turn on and then shut off.



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