Issue with 50PC3d LG

[gornati]

Hi all, this is my first post, regarding an issue with mine LG 50PC3D.

Here is a video of the issue.

And some pics also!



http://www.youtube.com/watch?v=bBwp2-VcoP4

Need some help diagnosing the problem, read some about Z sustain, Y etc...

Looks like power source?

Thanks in advance.

[gornati]

Re: Issue with 50PC3d LG

Just a little bit more information.

The issue started with some red pixels flickering on the screen only visible if looked closely.

Then after a few months, got no brightness from time to time.

Now it is like that all the time.

Doesnt smell bad, no smoke no loud noises.

[awyatt2]

Re: Issue with 50PC3d LG

looks like zsus

[gornati]

Re: Issue with 50PC3d LG

should we get some more opinions before i buy the board?

[gornati]

Re: Issue with 50PC3d LG

very disencouraging... Z sustain board is about $179.00 + 139.00 shipping = $318.00 + 70% import taxes and fees, +- $318.00 + $210.00 = $528.00, here in Brasil i can get a new 50" for about $800.00.

I would really appreciate more opinions!

[tom66]

Re: Issue with 50PC3d LG

It is possible to replace the IPM (integrated power module, also known as hybrid) for close to $30. But it requires very good desoldering equipment.

[gornati]

Re: Issue with 50PC3d LG

found it on ebay for $19.00, now looks much better.

[gornati]

Re: Issue with 50PC3d LG

It is possible to replace the IPM (integrated power module, also known as hybrid) for close to $30. But it requires very good desoldering equipment.

is this the power supply? any easier to replace the whole power supply?

[tom66]

Re: Issue with 50PC3d LG

No, it is a component on the Z-sustain which fails.

It contains an array of MOSFETs and IGBTs (power transistors.) Unfortunately, due to it being an IPM, you cannot replace the individual components, the whole module must be replaced.

This is definitely a Z-sustain failure. The panel is not being discharged and sustained properly.

[gornati]

Re: Issue with 50PC3d LG

so, the part to be replaced is the Z sustain board?

could you please confirm if this is the board we are talking about?

http://www.ebay.com/itm/261151105143...84.m1423.l2649

[tom66]

Re: Issue with 50PC3d LG

That is a board for a Pioneer plasma TV and will not be suitable.

You should replace the device under the large heatsink on the Z-sustain board. The picture you linked to is a similar board, X-sustain is same as Z-sustain. On an LG plasma the Z-sustain is on the right hand side of the plasma panel, looking from the rear.

[Sevenqi]

Re: Issue with 50PC3d LG

Please find out the z-sustain board part number in your TV before search the ebay.
The z-sustain is in the right side of your tv (from back).

[awyatt2]

Re: Issue with 50PC3d LG

is this the tv you posted a lg 50pc3d this zsus(link-ebay) is a pioneer. in order to work it must be the exact same board.you cant take any zsus and put in any tv. it may cross ref but you had better be sure.

[gornati]

Re: Issue with 50PC3d LG

well, looks like the part number is the same.

http://www.discount-merchant.com/LG-...-p/1005292.htm

or am i wrong?

[gornati]

Re: Issue with 50PC3d LG

or this one...

http://www.discount-merchant.com/LG-...-p/1002390.htm

[gornati]

Re: Issue with 50PC3d LG

i am opening the tv again and will get some pics and part numbers.

[tom66]

Re: Issue with 50PC3d LG

But it is not the right board. That is for a Pioneer plasma TV. Pioneer made their own plasma panels a few years ago, along with custom drive electronics. It is completely different and will NOT work.

[gornati]

Re: Issue with 50PC3d LG

Ok, just disassembled the TV and noticed some stuffed capacitors on the power board (at least i think it is the power board!
Please check the 2 pictures. one are the 3 stuffed capacitors the other one is the Z sus board with the right part number "6870QZC004B".

So the question is, could the issue be the power board? part #6709900020A.

Thanks for the patience guys!

[tom66]

Re: Issue with 50PC3d LG

That's the power board, yes.

You have a very common issue with this set which is failed capacitors.

But they are not yet giving trouble because the Z-sustain is the actual failed part. They would however cause problems in a few weeks to months ahead of time, so they should be replaced as well.

Your picture is of the Z-sustain and the IPMs are under the large heatsinks.

[gornati]

Re: Issue with 50PC3d LG

I live in Brasil, very expensive shipping rates and extremely high import fees and duties... i am talking about 110% aproximately!

The board is like $83 + $35 shipping ( the lowest i found on ebay) plus 110% on import fees, taxes and duties, we will talking about $250.00, should i repair this monster, 720p, 6 years old, or go for a new set, with 1080p, 3d and the works, for about $1000?

Any inputs would be great.