Author Topic: Vizio VO42L FHDTV10A - Blown Mystery Transistor on Power Board  (Read 551 times)

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Offline Metal Beard

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Hi Guys!

I identified two blown components on the main power board for this TV. The power board # is DPS-260HP-1 A
I have searched with no luck to find a schematic or component list for this board.
I can buy a replacement board for about 40-50 bucks, but if all it needs is a few components, i want to put my skills to use and fix it!

The first component was R919 which i believe was a 75 ohm resistor, i say believe because it had burned text that was hard to read, and read as open on a meter.

The second component is more of a challenge. It's some kind of transistor, Q905. The problem is that it exploded.
The top line where the component ID should be listed is literally gone. I can only make out F3 then either an M or N but it is cut off.
Below that on the next line is either Q or 6, then gone.
Bottom line of text is clearly an ST branding mark.

My best guess is a STF3N62K3 which is a N-Channel Power MOSFET. But with out any kind of schematic, or knowing for sure, it's impossible to say.

Any ideas?

Thanks in advance for any help.

Large pics in this link


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