Samsung PN50A510

[Malachi]

I just picked up this tv. Seems to have the powere issue that others hav posted about.
I'm going to replace C102, which is a 10v 47uf tantalum capacitor.

When I measure the one that is on the board, it measures 128uf.
Why such a big difference? Is my board somehow different?
The board number is BN94-1880A.
On the bottom of the board there capacitor isn't labeled C102 but it's in the position that it shows in the pictures of other posts.

[ReeceyBurger123]

Re: Samsung PN50A510

It measures that as its on the Pcb, there is other buck capacitance for that rail connected to that cap so thats why it reads that.

[Malachi]

Re: Samsung PN50A510

Ok thanks reecey. This cap is smaller in person than the picture seemed. Lol
Shout I buy a hot air gun or can this be accomplished with a soldering iron?
I have a station with a variable temperature setting.

Or should I send the board out for repair for $40?
Lol

[ReeceyBurger123]

Re: Samsung PN50A510

I would say hot air to remove and iron to get the new one on. I would personally use an iron but if your not that confident soldering use hot air to remove it.

[ReeceyBurger123]

Re: Samsung PN50A510

Also why send it out, you can do it lol ! Gain some experience step out of your boundary !

[Malachi]

Re: Samsung PN50A510

I'd have to buy a hot air gun. I might try with my soldering iron.
I'll order 2 or 3 of them. I'll also go buy a heat gun, I know it's not as good as a hot air station like I know you pros have but I've see people use the 2 setting kind.
If anything it will be good to have around.

[ReeceyBurger123]

Re: Samsung PN50A510

Yeah, to get it off basically flood both pads with solder and swipe it off. Use tweezers to align and solder the new one.

[dick_barton]

Re: Samsung PN50A510

+1
As ReeceyBurger123 says, flood it with solder and it should drop off.

[ReeceyBurger123]

Re: Samsung PN50A510

+1
As ReeceyBurger123 says, flood it with solder and it should drop off.

Yay lol

[Malachi]

Re: Samsung PN50A510

The cap arrived I put it in.
The tv doesn't turn on. The relay clicks, the front power led flashes and there are lights on the logic board that flash.
The new cap has different markings than the old one. It has a + on one end.
The old one didn't as seen in the picture. It has a gray line on one side. Was I correct in assuming that was the negative?

[Malachi]

Re: Samsung PN50A510

Back of the tv.

[Alastair E]

Re: Samsung PN50A510

Err--So Whats this fuse you are now on about then?

--Thought you were on about a cap...

Did you not do proper fault-finding and run test-patterns on the set?

Tis obvious from pics--the PSU is flashing out a fault-code.....

[Malachi]

Re: Samsung PN50A510

I'm sorry. I meant to say cap. Not sure why I said fuse.
The psu isn't flashing. The logic board below it is.
I did a search for the model number using the search function. The problem with the set matched what other users in the thread were experiencing. So this was the first thing I tried. The cap was cheap and I wanted to try my hand at replacing components like this.
It was my first attempt.

[Alastair E]

Re: Samsung PN50A510

That PSU is a known type that causes issues. Search its BN number...

[Malachi]

Re: Samsung PN50A510

Thanks Alastair. I will ASAP.

[dick_barton]

Re: Samsung PN50A510

The cap arrived I put it in. The new cap has different markings than the old one. It has a + on one end.
The old one didn't as seen in the picture. It has a gray line on one side. Was I correct in assuming that was the negative?

Here's a guide for future reference.

[Malachi]

Re: Samsung PN50A510

Then I put it in backwards. So I guess I better turn it around before proceeding.
Could that have ruined it? I purchased three so I can replace I if it did.

[Malachi]

Re: Samsung PN50A510

Reversed the cap and the tv seems to work now. Is it normal for the logic board LEDs to blink continuously?

[ReeceyBurger123]

Re: Samsung PN50A510

Reversed the cap and the tv seems to work now. Is it normal for the logic board LEDs to blink continuously?

Good news, also yes thats normal.

[Malachi]

Re: Samsung PN50A510

Thanks reecey. No atta boy for my first smd soldering job? I didn't throw a board at it.