Samsung plasma TV PS-42V4S repair

[PowerAmpFreak]

Re: Samsung plasma TV PS-42V4S repair

I wish it was, but the sticker on the back panel only says:

Model: PS-42V4S
Type: NS-42V4

And the serial number of course, nothing else.

[Wizard]

Re: Samsung plasma TV PS-42V4S repair

That's interesting. I'll do my best.

The service manual shows 2 mainboards side by side is your like this or one board?

Cheers, Wizard

[PowerAmpFreak]

Re: Samsung plasma TV PS-42V4S repair

My mainboard is just one board. It's marked:

Board: NELSON
Code: BN41-00452 C
Rev: MP 1.4 (2004-08-19)

Wednesday evening, I'll place a bunch of photos of the set.

[PowerAmpFreak]

Re: Samsung plasma TV PS-42V4S repair

A few pictures of the Samsung...

I'll bring the mainboard to work tomorrow and check trough a microscope. I hope I find some soldering problem on one of the big IC's.

Keep fingers crossed

[PowerAmpFreak]

Re: Samsung plasma TV PS-42V4S repair

Unfortunately, not much to complain about the soldering work...
Guess the only way is to find a replacement board.

[PowerAmpFreak]

Re: Samsung plasma TV PS-42V4S repair

Wizard, or anyone else, do you think it's possible to run into an old replacement mainboard for this set? Do you have any contacts, possibly?

[f67bird]

Re: Samsung plasma TV PS-42V4S repair

I may be able to help find you a part number. Can you reply back with the serial number?

[f67bird]

Re: Samsung plasma TV PS-42V4S repair

I see that this is not a U.S. tv. What country do you live in?
If U.K., I see this board on eBay' U.K. site with a buy it now price of 39.99.
It's item #120536834157 and auction ends in 6 days. There is also a complete non working tv with this same model number for sale there too... it ends 23 Mar, 201019:14:40 GMT. You may want to buy this, I noticed from your photo that one of the heatsinks seems to be missing from the lower y-buffer board, that will probably eventually lead to problems.

[PowerAmpFreak]

Re: Samsung plasma TV PS-42V4S repair

Thanks for the tip bird, unfortunately I'm in Sweden. I realize a replacementboard will be the only way to repair this TV. I will not even try doing a component level repair. I'm very interested if anyone find one.

[PowerAmpFreak]

Re: Samsung plasma TV PS-42V4S repair

Hmmm ... This TV hasn't been touched for a long time, when I today just thought to put back the mainboard and see the fault again.
But, the fault was gone!! I have NO IDEA how, but it must be some bad soldering somewhere on the mainboard. The reason for keeping this TV so long, is simply that I like the design because it uses DISCRETE driver boards and NOT the hybrid parts. That is what I call a good design.

[Hagis2k]

Re: Samsung plasma TV PS-42V4S repair

Can i bring this thread alive again ?

Well i got one of these sets for free by an old tv tech here in sweden (exactly the same model)

This unit works perfect for like 25-35min, then the picture in the sides start "shaking" like you have an highvoltage problem in an old crt then it shuts down within a few min i shall take a few pics of the fault this weekend and take quality pics on each board in it.

Repaired a few LCD's with bad PSU, i get the feeling like it is a power problem or could i be wrong?

Perhaps i should get my self an esr meter and see if i could find some bad caps?

It flashes with the red led 4 times when it starts is it suppose to do that?

TIA

Peter

[cabazas]

Re: Samsung plasma TV PS-42V4S repair

Can i bring this thread alive again ?

Well i got one of these sets for free by an old tv tech here in sweden (exactly the same model)

This unit works perfect for like 25-35min, then the picture in the sides start "shaking" like you have an highvoltage problem in an old crt then it shuts down within a few min i shall take a few pics of the fault this weekend and take quality pics on each board in it.

Repaired a few LCD's with bad PSU, i get the feeling like it is a power problem or could i be wrong?

Perhaps i should get my self an esr meter and see if i could find some bad caps?

It flashes with the red led 4 times when it starts is it suppose to do that?

TIA

Peter

Hi, I know this thread is very old, but I have exactly the same problem as you.
Have you managed to solve it? If you have, could you please tell me how?
I've searched the web but I can't find any case related to mine...

[laptopman123]

Re: Samsung plasma TV PS-42V4S repair

Wizard, or anyone else, do you think it's possible to run into an old replacement mainboard for this set? Do you have any contacts, possibly?

hi,you will get one on ebay uk.