PL51D550C1G Plasma Samsung - No picture, but sound is ok

[tom66]

Re: PL51D550C1G Plasma Samsung - No picture, but sound is ok

Can you share a picture of the fault?

[rogerazambuja]

Re: PL51D550C1G Plasma Samsung - No picture, but sound is ok

Bad news: Suddenly appeared vertical bars on the screen in random colors and the TV turns off by itself after a few seconds.



What could be the problem now?

[tom66]

Re: PL51D550C1G Plasma Samsung - No picture, but sound is ok

It doesn't say the current, but it is a 120mm Akasa ultraquiet amber fan (2-ball bearing) 12V DC 1400RPM. I can measure the current with my multimeter if it is necessary, but I think it is very low current.

You'll need the current to determine the resistance needed.

Assuming 0.07A which is fairly typical, the fan will run quietly and have reasonable airflow at 7V, so you want 8V drop across resistor at 0.07A: 114 ohms (R = V/I), 100 ohms is close value and the resistor will dissipate about 0.49W (so select a 1W or higher resistor and place it in the airflow to help cool it.)

[rogerazambuja]

Re: PL51D550C1G Plasma Samsung - No picture, but sound is ok

Place it above the Y-main so it blows air out the top of the TV. What is the rated current of the fan? (e.g. 12V 0.076A DC printed on it, rated current is 0.076A or 76mA)

It doesn't say the current, but it is a 120mm Akasa ultraquiet amber fan (2-ball bearing) 12V DC 1400RPM. I can measure the current with my multimeter if it is necessary, but I think it is very low current.

[tom66]

Re: PL51D550C1G Plasma Samsung - No picture, but sound is ok

Place it above the Y-main so it blows air out the top of the TV. What is the rated current of the fan? (e.g. 12V 0.076A DC printed on it, rated current is 0.076A or 76mA)

[rogerazambuja]

Re: PL51D550C1G Plasma Samsung - No picture, but sound is ok

There is a 15V line on the Y-main marked "Vg". You can use a resistor to limit the fan speed as 15V will be too loud.

What should be the resistor's impedance to result in 12V? Is it better to put this fan as an exhaust, to take off the heat inside my tv?

[tom66]

Re: PL51D550C1G Plasma Samsung - No picture, but sound is ok

There is a 15V line on the Y-main marked "Vg". You can use a resistor to limit the fan speed as 15V will be too loud.

[rogerazambuja]

Re: PL51D550C1G Plasma Samsung - No picture, but sound is ok

Guys, I want to put a PC cooler in my plasma TV, because I think the y board blew up because of the heat.
I have a 120mm fan, i just need a 12v line on the tv to power it.
There is a 12v line on this TV?

[tom66]

Re: PL51D550C1G Plasma Samsung - No picture, but sound is ok

Nice!

[rogerazambuja]

Re: PL51D550C1G Plasma Samsung - No picture, but sound is ok

Update: I replaced the y-main board and my TV is working now!
Thanks a lot everyone for helping.

[rogerazambuja]

Re: PL51D550C1G Plasma Samsung - No picture, but sound is ok

Just one more question, I just bought the Y-main board and it is Rev 1.5. My TV Y-main board is Rev 1.2, it will gonna work? I didn't find a Rev 1.2 board to sell.
PS: The seller said it will gonna work.

[rogerazambuja]

Re: PL51D550C1G Plasma Samsung - No picture, but sound is ok

Will these guys ship to you?
http://www.ebay.co.uk/itm/SAMSUNG-Y-...item3390645e5b

What's import tax like, something around 200% from what I've heard ?

Yes, they ship. I don't remember what is the import tax here, because everything that i've bought from other countries never was taxed (but I know that it happens often, maybe I'm lucky).
The problem is that things that come from outside Brazil, stays a long time at inward office of exchange (3 months sometimes) in order to check what it is and maybe tax it or not (Yes, third world problems).

I think I'm gonna buy here in Brazil, it costs 200 Reais (US$78 or £52), almost the same price. But thanks a lot for helping tom66.

[tom66]

Re: PL51D550C1G Plasma Samsung - No picture, but sound is ok

Will these guys ship to you?
http://www.ebay.co.uk/itm/SAMSUNG-Y-...item3390645e5b

What's import tax like, something around 200% from what I've heard ?

[rogerazambuja]

Re: PL51D550C1G Plasma Samsung - No picture, but sound is ok

Nobody?

[rogerazambuja]

Re: PL51D550C1G Plasma Samsung - No picture, but sound is ok

This is the board I need: Samsung BN96-16524A (LJ92-01764A) Y-Main Board

A real picture of my board:

[rogerazambuja]

Re: PL51D550C1G Plasma Samsung - No picture, but sound is ok

Begins with LJ, but i'm not at home right now. I will check and post here soon.

[tom66]

Re: PL51D550C1G Plasma Samsung - No picture, but sound is ok

What is the part number on the board? begins with "LJ" or "BN".

[rogerazambuja]

Re: PL51D550C1G Plasma Samsung - No picture, but sound is ok

Update: i went to the shop where the tech who said that the problemas was the screen, and he confessed that the problemas is the y-main board. He changed the board then the screen worked.
Can you guys tell me some trustable websites where I van buy this board (and ship to Brazil)?

[tom66]

Re: PL51D550C1G Plasma Samsung - No picture, but sound is ok

It is possible to have a micro fracture cause a silent leak of panel gas. But usually the crack is visible. Very hard to tell unfortunately.

[rogerazambuja]

Re: PL51D550C1G Plasma Samsung - No picture, but sound is ok

Update: i took my TV to another tech and he said that the problem is bad panel.
So I have 2 diagnostics: x and y boards or bad panel.

Is it possible to have a bad panel even without any visual cracks on it (visually the panel is perfect), specially after a big "explosion"?