Problem with Samsung ps43d490 PDP

[amennone]

Re: Problem with Samsung ps43d490 PDP

Hi, and sorry if I go to this discussion.
on the following PS43D450A2W TV, the following tabs are corrupted:
Y-SUS BOARD LJ41-09479A R1.7 LJ92-01797A
X-SUS Board LJ41-09478A / LJ92-01796A Rev.1.6
Both have a lot of shortcuts, I'm trying to fix the cards.
on the X-SUS board I can not identify a short component, it is a zener serigraphic ZD 4010.
Can anyone post the features of the zener?
On the net I could not get the electrical layout of the frame F82A.
Thank you .

[tom66]

Re: Problem with Samsung ps43d490 PDP

Is your TV currently running 1029 or a later version? If it is, then do not update it.

[csabex]

Re: Problem with Samsung ps43d490 PDP

I do not know for sure, but I think it applies to all D4x sets, i.e. D440, D450, and D490 (3D).

Hi tom66. The panels have arrived today and i finished with the replacement. First i replaced only the YSUS and indeed, the problem was the YSUS, because after the replacement it was ok. I turned off and replaced the X-main too, but when i try to upgrade the fw says that couldn't find fw files on the usb. The 1029 ver. it is on the TV and i try to refresh it, but as i see he supports only newer fw, the same fw on the usb is not ok as it's not a fresh one... Should i downgrade to an earlier version and after that upgrade again to 1029, or it is not necessary? It works great the TV, it is alive again and nothing has changed, beautiful colors and no problems with the display.

[csabex]

Re: Problem with Samsung ps43d490 PDP

Ok, thank you. As i have the panels and finish with the replacement, i will get back with the details.

[tom66]

Re: Problem with Samsung ps43d490 PDP

I checked the link and my model isn't on the list. I have the PS43D490A1W model. This means, that i have nothing to do?

I do not know for sure, but I think it applies to all D4x sets, i.e. D440, D450, and D490 (3D).

[csabex]

Re: Problem with Samsung ps43d490 PDP

I checked the link and my model isn't on the list. I have the PS43D490A1W model. This means, that i have nothing to do?

[tom66]

Re: Problem with Samsung ps43d490 PDP

Firmware is on the logic board. You should only need to update firmware if your set has an X-main fault or is built before a specific date. See here.

[csabex]

Re: Problem with Samsung ps43d490 PDP

Finaly i have found panels with the same revision on ebay. After i change them i need to do a firmware upgrade to the latest one that it is 1029.0 in my case? If so, why i need to do? The firmware isn't stored on the main panel, or the logic board?

[csabex]

Re: Problem with Samsung ps43d490 PDP

Hi Tom,

First of all thank you for the reply and suggestion. I just finished a few minutes ago with the resolder, and indeed it was two transistors poorly soldered, but the problem still remained Voltages are ok, 206 and 58 i measured. Ibelive remains the replacement of the boards... I link in what i found on ebay and please give me an advice that i am good to go with them? Here they are:
X-Main and Y-Main The Xis the same rev,but Y is not even 1.8, it is 1.9. That would be ok?
Thank you in advance.

[tom66]

Re: Problem with Samsung ps43d490 PDP

Check the Y-main board for a cold or cracked solder joint on one of the transistors. It's a common fault and it will cause picture issues.

If it's this, then you can just solder the pin to repair it.

[csabex]

Re: Problem with Samsung ps43d490 PDP

Hello everybody. I have a ps43d490a1w and the picture is displayed with red pixels as you can see in the attached picture. The problem started with no image and sound ok, but after 4 or 5 on/off cycles everything was ok and the picture didn't vanished. Now the picture stays, but i get this red pixels... I noticed that the pixels are more often with the media box of cable tv supplier, but if i watch a movie from PC the red pixels are not as many as on the media box source... What do you think, x and y change, or this simptome is dead panel and doesn't worth to try the x and y replacement? Thank you and sorry for bad english

Best regards,
Csabex.

[tom66]

Re: Problem with Samsung ps43d490 PDP

For plasma, it's glued.

[Agent24]

Re: Problem with Samsung ps43d490 PDP

They are glued to the panel, not replaceable.

Glued or soldered? I thought they were done with something like this: http://www.fancort.com/Products/Hot-...g-Bonding.html

[tom66]

Re: Problem with Samsung ps43d490 PDP

Unfortunately, not as far as I am aware. They are glued to the panel, not replaceable. You could attempt soldering fine wires to them after stripping the insulation off, but I don't expect that to work.

[Sabenhaz]

Re: Problem with Samsung ps43d490 PDP

Hi Tom
Have just noticed a very small tear in what you call the orange fpc data connection cable. It seems to expand over four threads\wires. If this is the prob can these be renewed or repaired?
Cheers
Sab

[tom66]

Re: Problem with Samsung ps43d490 PDP

It can be the connection between that orange ribbon (FPC) and the plasma panel, I don't know if that could be fixed.

[Sabenhaz]

Re: Problem with Samsung ps43d490 PDP

Hi Tom
Decided to bite the bullet and bought a used buffer board off ebay. When I fitted it I discovered that it was faulty and had no picture at all. I fitted the old one back on and instead of having one thin black line I now had two thicker (two or three pixels) black lines about 4 inches apart.
I decided to disconnect the second from bottom ribbon connector on the buffer board and found that the screen showed a thick four inch black band across the screen. I had marked where the two black lines were on the frame and they correspond exactly with the top and bottom of the black band.
It would seem the fault is something to do with connections at this point
Would appreciate your thoughts
Regards
Sab

[Sabenhaz]

Re: Problem with Samsung ps43d490 PDP

Seems to be one complete row of pixels.. Hhmm! dont really want to spend any more money on it unless I was certain it was going to fix it.
Thanks for your help
Sab

[tom66]

Re: Problem with Samsung ps43d490 PDP

It's usually bad panel but not due to your cause. If you bought the TV faulty that will have been present anyway. It's very rare on these particular panels.

You could try swapping the buffer board but I'd be surprised if it fixed the issue.

[Sabenhaz]

Re: Problem with Samsung ps43d490 PDP

ok thanks
Here it is