Transistor for TV problems

[Cue]

I'm a noob when it comes to these types of things, I have a transistor that i tested, it seems to be a bad one. I'm trying to order a new one from Amazon but i don't know which one I should get, can someone please post a link from Amazon on which type of transistor I should get,here's a pic of the bad transistor.
http://imgur.com/17ya9Ae

[newtothis]

Re: Transistor for TV problems

Image is broken, Please upload using the attachment function under "Go Advanced"

[tw2005]

Re: Transistor for TV problems

TOSHIBA Field Effect Transistor Silicon N Channel MOS Type (DTMOS II)
TK15J60U is the full number

600V 15A



http://alltransistors.com/mosfet/crs...=0.3&caps=SC65

https://www.digikey.com/product-sear...words=tk15j60u

UTSOURCE is in china, will take weeks

http://www.utsource.net/TK15J60U.htm...FREDvAodGXsAjQ

http://www.ebay.com/dsc/i.html?_from..._odkw=TK15J60U

[budm]

Re: Transistor for TV problems

How is it tested out? Shorted? What circuit section is it in?

[Cue]

Re: Transistor for TV problems

How is it tested out? Shorted? What circuit section is it in?

I had the negative lead in the middle, I put the positive lead on the left side It tested OL and on the right side it tested .259

[tw2005]

Re: Transistor for TV problems

I had the negative lead in the middle, I put the positive lead on the left side It tested OL and on the right side it tested .259

maybe explain to every one the fault + Tv model photos of boards etc

Chances are that FET is ok

And like newtothis said, click on advanced, manage attachments and upload direct, max size of image is 2000 x 2000 so you may need to resize the photos

[Cue]

Re: Transistor for TV problems

It's a Vizio E470VL, picture on the TV doesn't come on but the orange standby light changes from orange to white when I press power on the TV.

[tw2005]

Re: Transistor for TV problems

It's a Vizio E470VL, picture on the TV doesn't come on but the orange standby light changes from orange to white when I press power on the TV.

Dare I even try to get involved as my LCD knowledge is slim but if the front led changes colour have you then checked what DC voltages are present on the PSU at the connectors?

Does it remain white? If you get a flashlight and try to put some light on the TV can you make out an image?

there maybe other posts on Vizio E470VL. tried a search on model yet?

[tw2005]

Re: Transistor for TV problems

I get 2 pages on E470VL

[tw2005]

Re: Transistor for TV problems

backlight on at all?

[newtothis]

Re: Transistor for TV problems

No pic and probably no backlight but will have the 5v STBY as set "attempts" to power.... So will be missing the 12v and 24v.

Can you give me a close up pic of the connector that goes from the PSU to main (Top left of your image) so I can see the labels for voltages please.

Need to confirm voltages at this connector to confirm the missing voltages and see what's going on.

[Cue]

Re: Transistor for TV problems

Yeah, no picture and no back light, I tried the flashlight test I didn't see anything. Here's the pictures

[budm]

Re: Transistor for TV problems

I had the negative lead in the middle, I put the positive lead on the left side It tested OL and on the right side it tested .259

That is body diode of the MOSFET you are seeing, the Cathode of the Diode is connected to the Drain pin (middle pin), the Anode is connected to the Source pin (right pin), this is N-CH MOSFET.

[budm]

Re: Transistor for TV problems

Yeah, no picture and no back light, I tried the flashlight test I didn't see anything. Here's the pictures

Are these readings with the power switch activated? If it is activated, then the main board is the problem.
https://www.badcaps.net/forum/attach...7&d=1431658037

We will need good clear pictures of the whole back side of the TV to see all the boards.

[Cue]

Re: Transistor for TV problems

That is body diode of the MOSFET you are seeing, the Cathode of the Diode is connected to the Drain pin (middle pin), the Anode is connected to the Source pin (right pin), this is N-CH MOSFET.

Did I measure it correctly?

[Cue]

Re: Transistor for TV problems

Are these readings with the power switch activated? If it is activated, then the main board is the problem.
https://www.badcaps.net/forum/attach...7&d=1431658037

We will need good clear pictures of the whole back side of the TV to see all the boards.

OK, I will tomorrow

[budm]

Re: Transistor for TV problems

Did I measure it correctly?

It is not showing as shorted circuit, using Ohm meter can only do so much for testing the MOSFET, but this MOSFET has nothing to do with what the TV is doing right now, it is the main board that is not sending the signals to turn on the power supply board and the inverter board but we need to know if those Voltage readings are made with the power switch is activated or not, that is VERY IMPORTANT info I need to know.

[Cue]

Re: Transistor for TV problems

Yes the TV was on when I did the readings. Here's the pics

[budm]

Re: Transistor for TV problems

OK, then the problem is on the main board and will require more troubleshooting.

[Cue]

Re: Transistor for TV problems

Can a eeprom fix this issue? And what's under that metal rectangle in the middle of the main board?