Nuvision Nuv52fx5 no picture.

[burner6999]

I have a 52" Nuvision NUV52FX5 that has a problem with the picture. I believe it is the tcon board. But looking for some insight. The tv turns on and the backlight comes on as well. There is just no picture. I have checked voltages on the psu and all are good. I checked the fuse on the tcon and it was ok as well any other ideas? Does it sound like the tcon board? I checked the voltage at the fuse on it as well and got 12VDC. Please any help would be great. I have added some pics of the back of the tv. Sorry for picture quality that is the best i can do until my girl gets home with the good camera.

[drpj23]

Re: Nuvision Nuv52fx5 no picture.

Check to see if there are any fuses on the main and check the voltage regulators too. I forgot who has the info on how to present that but I'll go find it after I post this.

Usually image probs reside in main or T-CON.

[drpj23]

Re: Nuvision Nuv52fx5 no picture.

https://www.badcaps.net/forum/showthread.php?p=261329

This is how to present it as from retiredcaps

[burner6999]

Re: Nuvision Nuv52fx5 no picture.

Ok so I checked all of the voltage regulators and all test fine. There was about 10 of them. I checked that guide and all were according to the specs. I couldnt find a fuse on the main board anywhere. Should there be one?

[burner6999]

Re: Nuvision Nuv52fx5 no picture.

What do you guys think? Any other steps I should try or just order the tcon board?

[budm]

Re: Nuvision Nuv52fx5 no picture.

Check the voltages on the T-CON beside at the fuse yet?

[drpj23]

Re: Nuvision Nuv52fx5 no picture.

It looks like there may be reg(s) on the TCON too, did you check those?

And fuses depend on manufacturer, usually by connector from p/s

[burner6999]

Re: Nuvision Nuv52fx5 no picture.

That is a terrible picture but I looked at the tcon there are no regs on it. Also where should I check the voltages at?

[burner6999]

Re: Nuvision Nuv52fx5 no picture.

Here are some better pics of it.

[budm]

Re: Nuvision Nuv52fx5 no picture.

There are at least two switching regulator circuits ont the board, the picture is very poor for me to point out the test points for you to test.

[drpj23]

Re: Nuvision Nuv52fx5 no picture.

Well first make sure the fuse is ok

[burner6999]

Re: Nuvision Nuv52fx5 no picture.

I already checked the fuse. I said that in my first post. Bud can you point out the 2 that you are talking about and I can get a better pic of that area?

[budm]

Re: Nuvision Nuv52fx5 no picture.

Please see attached picture, we really need good bright picture to see the test points.
From the look of this T-CON board with two connectors at the bottom edge, there must be another big board that drives this T-CON board, more likely that this TV can do 120/240 frame rate? This will make it real difficult to troubleshoot due to that frame rate driver board.

[burner6999]

Re: Nuvision Nuv52fx5 no picture.

There is the board in the picture that I have outlined.

[burner6999]

Re: Nuvision Nuv52fx5 no picture.

Here is a better picture of the tcon board and that other board.

[burner6999]

Re: Nuvision Nuv52fx5 no picture.

Anybody? Are those pictures good enough?

[budm]

Re: Nuvision Nuv52fx5 no picture.

OK, these are some of the voltages in the picture that we want to see what you have with the TV on.

[burner6999]

Re: Nuvision Nuv52fx5 no picture.

Ok I also tested the other one marked in my pic cause it said VCC too.
VCC = 3.2
VCC3.3 = 3.2v
VCC1.8 = 1.7v
VOFF = -7.3v
VOK (Actually VON)= 21.8v
VGH (Actually VON_P) = 24.9v
AVDD = 15v
VIN = 11.8v

Does that help any?

[budm]

Re: Nuvision Nuv52fx5 no picture.

They do not look bad to me, may be some one else can chime in.

[burner6999]

Re: Nuvision Nuv52fx5 no picture.

Do you think this board is bad? Also can anyone else help me figure this out? What is causing it to have no picture?