Samsung 50" TV flashing power light

[keithf2]

When you remove the plug from the main board to the power board the back-lights all start flashing, what voltage should the BLU on/off be.

[ReeceyBurger123]

Re: Samsung 50" TV flashing power light

0 research done I like it. Bl should be I believe 1.5-3v or so.

[keithf2]

Re: Samsung 50" TV flashing power light

Is this BLU on/off the same as the Pl on/off, because when I check the circuit I get a dead short between the two pins

[ReeceyBurger123]

Re: Samsung 50" TV flashing power light

Is that with the Mb unplugged ?

[sordids999]

Re: Samsung 50" TV flashing power light

Posting pictures of the back of your tv showing the boards with clear pictures may help you more with fixing your problem


Also model number of the tv please

[keithf2]

Re: Samsung 50" TV flashing power light

Thanks for the offer but all I wanted was an answer to the question.yes that was with the board laying on the bench.

[CapLeaker]

Re: Samsung 50" TV flashing power light

Thanks for the offer but all I wanted was an answer to the question.yes that was with the board laying on the bench.

Pffft. How would you suppose we should help you without any model number or pics of the TV ? Is it a LED or a LCD or what?

If it is a LED, Id be checking the LEDs in the panel first.

As for your question: I am not so sure you should be poking around that thing too much without knowing very basic things what PSon and BLon pins actually do.

[keithf2]

Re: Samsung 50" TV flashing power light

I have worked on Radar systems and naval missiles systems and I have been fixing TVs for sometime but from time to time some thing new comes out that one needs some information on and this is the case.And in the first comment I said that when the Main Board is disconnected the LED are flashing.

[budm]

Re: Samsung 50" TV flashing power light

So the backlights are flashing.
What is the power supply board part number? BN44-??????
Model number of the TV?
BL-ON (BLUON) is steady state DC. BL-ON is usually >2.5Vdc = ON, <1Vdc = OFF, BUT some of the SAMSUNG board uses 0.7Vdc = ON, <.2Vdc = OFF.

[keithf2]

Re: Samsung 50" TV flashing power light

Hi budm, backlights are flashing with the MB disconnected. power supply board is a BN44-00617A, Model number UE50F6200AKXXU

[ReeceyBurger123]

Re: Samsung 50" TV flashing power light

Research how to test led backlights.

[keithf2]

Re: Samsung 50" TV flashing power light

Hi Budm can you simulate the BLU voltage with 3 batteries, for test purposes

[CapLeaker]

Re: Samsung 50" TV flashing power light

take a 1k ohm resistor and jump 5V STBY to BLon

[keithf2]

Re: Samsung 50" TV flashing power light

Would be nice if someone said some thing " we do not know about this problem" or just go away or is this system not working anymore

[CapLeaker]

Re: Samsung 50" TV flashing power light

easy for you to say... we don't even have a picture of your PSU so we have something to look at. I think you should know with 114 posts on your account, that we need pics. Other than that it's just guessing around.

Your TV is a LED. You may have a bad LED and nothing wrong with the PSU. In order to test the LEDs, you have to take the panel apart. There are tons of threads here about that.

[keithf2]

Re: Samsung 50" TV flashing power light

Yes have taken the panel apart and have said before all the LED are working I can see the all flashing, I think it is the Power board but cannot find and diagrams, there is no bulging capacitors.

[CapLeaker]

Re: Samsung 50" TV flashing power light

Yes have taken the panel apart and have said before all the LED are working I can see the all flashing, I think it is the Power board but cannot find and diagrams, there is no bulging capacitors.

Only because you see that all LED's are flashing, it doesn't proof that all LED's are O.k. There may be one that is intermittent, may be a bad connector somewhere etc.
Power the led strips externally and see what happens

[keithf2]

Re: Samsung 50" TV flashing power light

Does anyone have a diagram for a BN44-00617A, this is from a Samsung UE50F6200AKXXU television, or know where to get one

[ReeceyBurger123]

Re: Samsung 50" TV flashing power light

Check google or Toms site.

[keithf2]

Re: Samsung 50" TV flashing power light

Have already checked