TV Problem Samsung PS50C490 Plasm 3D Led Light 5 times

[Gilera001]

Re: TV Problem Samsung PS50C490 Plasm 3D Led Light 5 times

Hello, no first the ymain it´s a mistake and the ymain now faulty?
and can i reapir it? i have a multimeter and a Solder =)
how can i test the ymain?

[capkid]

Re: TV Problem Samsung PS50C490 Plasm 3D Led Light 5 times

Like Tom mentioned, you most likely are going to have to change both the Y-main and X-main at the same time. A faulty Y-main can kill an X-main and vice versa in these newer Samsung TVs. Attempting to repair the Y-main or X-main in these thin Samsungs is not usually a good idea.

When your replacement boards arrive, hook EVERYTHING UP AT ONCE then turn on the TV. I'd probably even consider buying a new Y-buffer to be safe, but they don't fail often.

[tom66]

Re: TV Problem Samsung PS50C490 Plasm 3D Led Light 5 times

I'd personally avoid buying a Y-buffer unless you absolutely have to, because these new Samsung panels tend to kill them when they get smashed (and 99% of eBay parts are pulls from smashed panels.)
http://www.youtube.com/watch?v=51SZsfH60EY

[Gilera001]

Re: TV Problem Samsung PS50C490 Plasm 3D Led Light 5 times

Hello, so now I have a new y buffer installed and the TV also goes to, but now he has such visual fault, what can be wrong?

[tom66]

Re: TV Problem Samsung PS50C490 Plasm 3D Led Light 5 times

What does it look like if you show a normal image?

[Gilera001]

Re: TV Problem Samsung PS50C490 Plasm 3D Led Light 5 times

its a normal image but the white pixel mistakes at Picture 1. what can that be

[tom66]

Re: TV Problem Samsung PS50C490 Plasm 3D Led Light 5 times

Try with your original buffer.
If that is still bad, you need to check the VSCAN, VE, VS and VA voltages. VSCAN is most likely to cause this.
Could also need Yrr/Yfr tweak if new Y-main.

[tw2005]

Re: TV Problem Samsung PS50C490 Plasm 3D Led Light 5 times

One thing is certain, the buffer ribbons are not seated correctly seeing those thin black lines

[Gilera001]

Re: TV Problem Samsung PS50C490 Plasm 3D Led Light 5 times

Die Buffer Ribbon stecken richtig, und wie kann ich den Vscan überprüfen? mit dem Alten buffer bekommeich leider kein bild nur für 1 sekunde

[tw2005]

Re: TV Problem Samsung PS50C490 Plasm 3D Led Light 5 times

[QUOTE = Gilera001; 360998] The buffer Ribbon stuck properly, and how can I check the Vscan? bekomm calibrated with the old buffer unfortunately no picture for 1 second [/ QUOTE

Well with my eyes i see thin black lines running full width and usually that's an indication of misaligned panel ribbons on the Ybuffer. Otherwise a bad ybuffer

[Gilera001]

Re: TV Problem Samsung PS50C490 Plasm 3D Led Light 5 times

I have new photos taken maybe it is better to see the buffer ribbon are all correct

[tw2005]

Re: TV Problem Samsung PS50C490 Plasm 3D Led Light 5 times

No lines now, they were pretty obvious before in the previous photos.

In which case Toms suggestion, measure all the voltages. maybe the Ymain has also been damaged by the bad buffer board?

i don't have a manual but next to the white trimmer pot VR5501 VR-FR there should be a pad labelled VSC.

Something I found.


If Vsc is low or missing and Vs was OK, the failure is with the Y-Board since the Y-Board generate the Vsc voltage from the Vs supplied by the SMPS. If Ve is low or missing and Vs is OK, the failure is with the X-Board since the Ve is generated by the X-Board from the Vs supplied by the SMPS. Please note in some rare cases the Ve may be generated by the Y-Board feed to the X-Board.)

[Gilera001]

Re: TV Problem Samsung PS50C490 Plasm 3D Led Light 5 times

Thanks for the help I have measured all points
VA = 53.8
VS = 203
VSC 176
VE= 72

is the x-value is the main defect or ok?

[tom66]

Re: TV Problem Samsung PS50C490 Plasm 3D Led Light 5 times

Can you see a point for 2Ve or Ve2?

Looks like your Vs and Va are a little low -- I would increase them to match the sticker ratings. Never go beyond 55V on Va.

See if there is an adjustment for Ve if so put it at the rated voltage.

You may want to increase Vsc (make it more negative) and see if Ve follows (on some panels there is no Ve adjustment and it's based off -Vsc.) Try around -185V for Vsc, and see if artefacts are reduced.

[tw2005]

Re: TV Problem Samsung PS50C490 Plasm 3D Led Light 5 times

I don't know what to make of it, it does seem very localised and running vertically the full height of the panel.

Ve & 2Ve, I have not seen that before on a label either.

[tom66]

Re: TV Problem Samsung PS50C490 Plasm 3D Led Light 5 times

There's a chance the connector on that part of the panel is dirty/loose.

[Gilera001]

Re: TV Problem Samsung PS50C490 Plasm 3D Led Light 5 times

2VE or ve2 not found, but tensions have adjusted all the strips (pixels) are still there, there's an idea?

[tom66]

Re: TV Problem Samsung PS50C490 Plasm 3D Led Light 5 times

Along the bottom of the plasma screen, you've got a row of connections, probably around 12 or 15.

The power to the TV must be off.
Unplug each connector. Be careful not to damage the latch on the C board.
Plug each connector back in again, making sure it is securely seated.
Power the TV back on again and inspect for problems.

[Gilera001]

Re: TV Problem Samsung PS50C490 Plasm 3D Led Light 5 times

have a picture, and there are only green stripes vertical, so that you can assign to the problem better

[tom66]

Re: TV Problem Samsung PS50C490 Plasm 3D Led Light 5 times

Follow the steps I have outlined, but I fear it is a bad plasma panel...