Question about Panasonic Projection Televisions

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Internal cooling fan

Changed the lamp-and now manual states that internal cooling fan has
problem and call for service ---can you help?

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  • 4,234 Answers

Go back and recheck all of the access doors. If any are not closed completely, the unit won't power up. Also check to be sure that the fan spins freely and that there is no excessive dirt in the area. There are air flow sensors also that will shut the set down.

Keep us posted.
Dan

Posted on Feb 07, 2009

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Diagram for cooling fans that controls the lamp on a Hitachi TV


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Hitachi only offers service manuals online and only to authorized repair shops with a user name and password. If two fans ARE involved it is unlikely both would be bad---flying by the seat of our pants I would suggest if possible to check the voltage at the fans---or even spin them to see if they will suddenly work---dirt can cause a fan to slow or stop and the set would either shut down or issue some kind of "fan failure" or temperature warning.


I am willing to help as much as possible and I understand the desire for a diagram but that is unlikely.

Let me know if I can assist or such in any way---I do this here for free but am here to help people.

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1 Answer

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The problem is not with the lamp. This TV (I have one) has 3 blowers internally that keep everything cool. What happens over time, regardless of how clean you keep your house, they get clogged and stop. What you are seeing is that the system cannot see one or more of the fans spinning. Yes, they detect whether the fans is spinning.

You'll need the Service Manual or Repair Manual to take the TV apart. This is non-trivial. It took me 2 days to take it apart and a day to put it back together. I used another day to clean and the blowers and air ducts within the TV. I had one stopped blower, the other two were pretty dirty. I was able to fix it without buying anything. The stopped blower has to be disassembled, cleaned, lubricated and seems to be holding (knock on wood).

I seem to recall I had to pay for the service manual. Here's one link you can try. You can also do some other searches to see if you can find one for free http://www.nodevice.com/manual/sonymans/manual3410pdf/get4927.html

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sometimes they will have Free service Manual you can print out online Type in your Model number WD52525 and on top left side page look to see if they list the free service manua

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According to the E44W48LCD service manual, the temperature indicator red light states the projection TV shut down due to overheating. Red (flashing) states the projection TV shut down, check the cooling fan.

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