Question about Philips 37FD9954 37 in. HD-Ready Plasma Television
I just picked up a non working Philips 37fd9954/17. Originally it did nothing and I began surgery. The main fuse was blown, so I tried replacing it and it blew again. I found the main problem to be a shorted power mosfet (One of the two STP15NK50ZFP). I replaced them, checked all 9 fuses and gave it a go. When I plug it in, the red standby light comes on and stays on. When I turn on my tv, the green light will come on for about 10 seconds, (no picture or sound) then will flash red until i turn off the set. When i try again the same thing happens. What would be likely to have also gone out with the mosfet?
ALSO... On the back of the power supply board, there is a black wire juming from a FET to a transistor. there is also a small glass diode jumped across 2 pins of a 16 pin ic. Are these supposed to be there?
Suggestions on what to look at next?
What exactly do you mean by jumped accross the pins of an IC? Can you please get me an image so that I can help you with your problem. The diode you are talking about is called zener diode. The possible source of the problem is the voltage regulator IC however I would like to see the image first. Please upload it to imageshack.us and get me the direct link so that I can have a look.
Posted on Jun 07, 2010
I have not repaired this model. One of the most common problems are the capacitors. You will need a cap checker to locate these. Hmm.....Look over the powerboards......You may see two or three capacitors that may be bulged or skinned. I would most certainly look for these. The capacitors are one of most reason these TVs go down. And in many cases easy to replace. Good Luck and thanks for asking!
Posted on Jun 05, 2010
The problem can be solve by the following
you have to read the glass diode and the transistor by the use of a multimeter to check for defected one but if otherwise Ur power supply board is dead, u know basic electronics’ and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get ur tv power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.
Thanks for asking
Posted on Jun 05, 2010
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Posted on Jan 02, 2017
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