Samsung PS51E55D1M

[Geoff.]

Hi,

Hoping someone can help. I have the Samsung PS51E55D1M and a couple of nights ago the thing went pop. Since then there is no picture. I can power it up and there appears to be power to the screen but no picture. switching between different inputs makes no difference.

Please help.

Thanks

Geoff

[Hamie]

Re: Samsung PS51E55D1M

Pictures?

[Geoff.]

Re: Samsung PS51E55D1M

hi Hamie,

Are you wanting pictures of the PCB's?

[Hamie]

Re: Samsung PS51E55D1M

Yes

[Geoff.]

Re: Samsung PS51E55D1M

Hi Hamie,

Please see below.

[Hamie]

Re: Samsung PS51E55D1M

Ok so on the control board.

This one:



Does the LED blink once every second or once every six seconds?

[Geoff.]

Re: Samsung PS51E55D1M

its on for 6 secs off for 2 secs then repeats

[Hamie]

Re: Samsung PS51E55D1M

Ok you see these silver test points marked VS and VA

Use your meter on DC volts.
Black probe to the TV chassis.
Red prob to either of the test points.

Post results

VS=
VA=

Also there should be a similar point on the Y-sustain called VSC (VSCAN)

Post its result.

VSC=

[Geoff.]

Re: Samsung PS51E55D1M

Ok you see these silver test points marked VS and VA

This is on the PSU board, correct?

Use your meter on DC volts.
Black probe to the TV chassis.
Red prob to either of the test points.

Post results

VS=
VA=

Also there should be a similar point on the Y-sustain called VSC (VSCAN)

I have an SVC VS and an SVC DGND, is this what we're looking for?

Post its result.

VSC=

Is the above correct Hamie

[Hamie]

Re: Samsung PS51E55D1M



Vs va points above.

Yes also post the result of service vs on the y-sustain.

But you need to find the point called VSC or might be labelled as VSCAN.

[Hamie]

Re: Samsung PS51E55D1M

Take a good photo of the y-sustain face on, not at an angle.

[Hamie]

Re: Samsung PS51E55D1M

The test point for VSC might be a jumper wire.
It will be labelled, And should be close to a potentiometer also labeled VSC.

[Geoff.]

Re: Samsung PS51E55D1M

Ok you see these silver test points marked VS and VA

Use your meter on DC volts.
Black probe to the TV chassis.
Red prob to either of the test points.

Post results

VS= 10.7VDC
VA= 0.2VDC

Also there should be a similar point on the Y-sustain called VSC (VSCAN)

Post its result.

10.7VDC

VSC=

Please see above

[Geoff.]

Re: Samsung PS51E55D1M

The VScan has 0.0VDC

[Geoff.]

Re: Samsung PS51E55D1M

Apologies Hamie, The power keeps turning off VSCAN is at 2.9VDC

[Geoff.]

Re: Samsung PS51E55D1M

VSCAN back to 0.0VDC now

[Alastair E]

Re: Samsung PS51E55D1M

Hmm--Went Pop...

No Vs, PSU shutting down, falling Va.

Short on Vs line--prolly on Y-SUS.

Check for shorts on Vs Line and the IGBT's/MOSFETS on both Y-SUS and X-SUS.

If Y-SUS short, Check Buffers too. Buffers Kill Samsung Y-SUS when they fail.

[Geoff.]

Re: Samsung PS51E55D1M

Thanks Alastair,

If there is a short on the Y-SUS is it possible to fix or do i replace the board. having read the link, How can i check the buffers?

[Hamie]

Re: Samsung PS51E55D1M

Pull the y-sustain from the tv and take a photo of the underside of the board.

[Geoff.]

Re: Samsung PS51E55D1M

Thanks Hamie, will do tonight.