Samsung PN60E530A3F...makes startup noise, LED blinks 6 times and then dead.

[hardwareguy]

So this thing, for which I have no service literature whatsoever for just showed up at the door to be looked at.

This customer is a bit of a DIYer so he gave me the Y sustain board to recap. A 250V 150uF cap (C5091) was bulging and all of those types (Samwha PF) were replaced with Panasonic EE high ripple type caps. When that failed to fix the issue, I told him to bring the entire TV in as there was no way I was going to troubleshoot this one board at a time.

The symptom is the same: The boot sound plays, there is no image and then the standby LED blinks 6 times. What does 6 blinks mean and what board should be probed first?

This is also the first plasma to grace my bench! I have a general idea of what the boards do, etc but no practical experience actually troubleshooting one. (I'm mainly doing PCs, LCD monitors and big power amps here.)

[tom66]

Re: Samsung PN60E530A3F...makes startup noise, LED blinks 6 times and then dead.

The blinking light means nothing. This is a common confusion around Samsung sets... it is just normal power up blinking.

First, check VERY carefully around the screen for any cracks or chips: they will cause this exact symptom. They can be right on the edge of the panel.

I'm very surprised you had a bad capacitor on one of these sets; did you happen to keep the old one so we can see how it's failed?

Then, focus on the small board centrally placed in the TV chassis. It's a small green board, just below the power board, where the power connects. This is the control/logic board.

There should be a light on it, does it blink at all? If it blinks, does it blink about once a second, or once every 5-7 seconds?

[hardwareguy]

Re: Samsung PN60E530A3F...makes startup noise, LED blinks 6 times and then dead.

With the lower ribbon cable from control to Y sustain disconnected I have a 1Hz blink and perfect Vs and Va rails.

With the lower ribbon cable attached: Vs and Va are shut down, light stays on for approximately 5 seconds and stays off for approximately 2 seconds.

The cap that failed on Y sustain has a very slight bulge at the top. It did not leak.

[hardwareguy]

Re: Samsung PN60E530A3F...makes startup noise, LED blinks 6 times and then dead.

I will be available for more tests Friday night. (may be early morning for you, I'm -6 GMT)

I'm off to my home town for lucrative Apple repairs and to help repair the upstairs bathroom. (It got torn apart by plumbers replacing 80 year old pipes.)

[tom66]

Re: Samsung PN60E530A3F...makes startup noise, LED blinks 6 times and then dead.

Ok, I'd start checking Vsc and if available Vsch on Y-main board.

[tom66]

Re: Samsung PN60E530A3F...makes startup noise, LED blinks 6 times and then dead.

Just post back when you are ready.

[hardwareguy]

Re: Samsung PN60E530A3F...makes startup noise, LED blinks 6 times and then dead.

Ysch: 0V

Vscan 15V: 800mV

Intuition tells me to hunt for a short.

[tom66]

Re: Samsung PN60E530A3F...makes startup noise, LED blinks 6 times and then dead.

Pull the Y-buffer board and check if those voltages return, if only briefly.

[hardwareguy]

Re: Samsung PN60E530A3F...makes startup noise, LED blinks 6 times and then dead.

Pull the Y-buffer board and check if those voltages return, if only briefly.

No appreciable change in voltages were found after this test.

[hardwareguy]

Re: Samsung PN60E530A3F...makes startup noise, LED blinks 6 times and then dead.

I have found an open resistor on the Y main board. R5027 is open, 100k and it appears to be a 1/2W fusible resistor. This resistor is in parallel with C5091, the cap that had visible bulging.

Check U5014?

[tom66]

Re: Samsung PN60E530A3F...makes startup noise, LED blinks 6 times and then dead.

U5014, is that the switching controller IC for Vscan/Vsch? If so yes I would check it.

[hardwareguy]

Re: Samsung PN60E530A3F...makes startup noise, LED blinks 6 times and then dead.

U5014, is that the switching controller IC for Vscan/Vsch? If so yes I would check it.

Integrated SMPS and switching MOSFET. I'll dig up the datasheet and see if I can figure things out.

[hardwareguy]

Re: Samsung PN60E530A3F...makes startup noise, LED blinks 6 times and then dead.

No short between source and drain on the SMPS IC, will test for output waveform, controller Vcc and main supply. No other open fusible resistors found.

[tom66]

Re: Samsung PN60E530A3F...makes startup noise, LED blinks 6 times and then dead.

It seems like you have a rough idea of what you're doing!
It is possible, maybe, that the capacitor has shorted. I have seen a few cases of this although it is rare.

[hardwareguy]

Re: Samsung PN60E530A3F...makes startup noise, LED blinks 6 times and then dead.

If that shorted then it could have taken out the controller but it's *in theory* protected against such.

The small SMD diodes on the solder side are looking good as well.

I'll probe that IC after I fix a friend's car.

[tom66]

Re: Samsung PN60E530A3F...makes startup noise, LED blinks 6 times and then dead.

Oh, I thought the capacitor was on the input side of the converter. It's on the output?

[hardwareguy]

Re: Samsung PN60E530A3F...makes startup noise, LED blinks 6 times and then dead.

Oh, I thought the capacitor was on the input side of the converter. It's on the output?

It appears to be the Vscan rail buffer. Do you have a schematic for this TV?

[tom66]

Re: Samsung PN60E530A3F...makes startup noise, LED blinks 6 times and then dead.

I don't I'm afraid.

[TheDimenator]

Re: Samsung PN60E530A3F...makes startup noise, LED blinks 6 times and then dead.

Hey guys i dont know if you were able to find the problem for this TV. But I would find it nice if you could guide me if you did beacause i have the exact same problem were the tv simply does athe bootup sound then nothing. though when i received it it was cold outside so when i tested it first the tv worked proply( probably because it was cold) then once it warmed up a little it started having the symptoms I mentioned earlier.

[jjanssen7]

Re: Samsung PN60E530A3F...makes startup noise, LED blinks 6 times and then dead.

Read through this thread. Pretty much everything you are looking for there.

Especially the cold start/warm no-start problem...

https://www.badcaps.net/forum/showth...t=43075&page=6