Question about Samsung TXR3079 TV

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Samsung TV Problems

I am just checking to see if you were able to resolve the problems with your Samsung 30 inch TV. I have the same model and am having the same issues. I had Best Buy come out and take a look and he said something to the effect of replacing the entire circuit board which would run about $350 for everything. That seems ridiculous.

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Mike:

What problem did you have with your Samsung TV? If it has anything to do with your set turning off after 30 minutes or so, then read on.
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I had the same problem with my Samsung TV Model: TXR3079WHX. I troubleshot my problem with a can of component cooler from Radio Shack and found my problem to be a defective voltage regulator, identified as "QR015" on the main circuit board (the same board that contains the high voltage section).

Caution:

Before I proceed any further I need to strongly warn you. Do not attempt to remove the back cover, troubleshoot, repair or perform the actions that I have done, if you are not a "qualified service technician". Removing the back cover exposes you (and anyone else) to harmful and deadly electric shock, even though the TV may be unplugged from the wall outlet and turned off. You (or anyone else) can be seriously injured or even killed. If you are not qualified, play it safe by allowing others who are qualified repair this for you.

The defective part (overheats and shuts your TV off) is voltage regulator manufactured by Fairchild. The part number is KA75450ZTA. This part is available from Mouser Electronics for less than 20 cents plus shipping. In order to replace this part a qualified technician will need to remove certain cables and unscrew the main board to allow access to desolder and solder the new component.

Hope this helps.

Posted on Jun 06, 2009

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