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my-name-is-john

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Last Activity: 07-09-2022, 11:36 AM

Joined: 01-22-2021

Location: Newport News VA

my-name-is-john replied to ID parts & troubleshoot a short - UN75F6300AF Samsung TV

in Troubleshooting TVs and Video Sources

02-05-2021, 11:15 AM
Re: ID parts & troubleshoot a short - UN75F6300AF Samsung TV

Bruce, took apart my TV last weekend to replace the bad LED strip (full story at link below... spoiler: I was successful ). I didn't see any indications of arching on any connectors. I will say when plugged in the TV to see the LEDs that were out (three rows) some of the bad rows had LEDs that were dimly lighting up intermittently (e.g. low voltage?). I really think the issue with having the LED row out for so long caused my power supply to eventually fail, but that's just my theory.
...

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my-name-is-john replied to ID parts & troubleshoot a short - UN75F6300AF Samsung TV

in Troubleshooting TVs and Video Sources

02-05-2021, 10:22 AM
Re: ID parts & troubleshoot a short - UN75F6300AF Samsung TV

Does anyone know what this "SP4" component is? I still haven't been able to figure it out....

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my-name-is-john replied to ID parts & troubleshoot a short - UN75F6300AF Samsung TV

in Troubleshooting TVs and Video Sources

02-05-2021, 10:20 AM
Re: ID parts & troubleshoot a short - UN75F6300AF Samsung TV

Tested the two MOSFETs near the blown capacitor (26NM60N) and one of them is showing continuity (multimeter beeps) across all three pins. I think this one's bad! Thanks R_J for the suggestion!...

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my-name-is-john replied to ID parts & troubleshoot a short - UN75F6300AF Samsung TV

in Troubleshooting TVs and Video Sources

02-04-2021, 03:42 PM
Re: ID parts & troubleshoot a short - UN75F6300AF Samsung TV

First, Thanks for all the suggestions!

So, no MOSFET "nearby", the capacitor was near a rectifier (18NM60N, [url]https://cdn.badcaps-static.com/pdfs/732afdb63927b69a6133a4c3b4fa564d.pdf[/url]). I'm measuring 6Mohm on one side, and infinity on the other...does that indicate a bad diode rectifier?

I've also found four MOSFETs near the 'top' of the board. FFPF20UA60DN is stamped on them. I think this is their datasheet: [url]https://cdn.badcaps-static.com/pdfs/387ad55af4e2eac3d2787d7967ef1ee7.pdf[/url]...

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Last edited by my-name-is-john; 02-04-2021, 03:46 PM.
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my-name-is-john replied to ID parts & troubleshoot a short - UN75F6300AF Samsung TV

in Troubleshooting TVs and Video Sources

02-04-2021, 03:25 PM
Re: ID parts & troubleshoot a short - UN75F6300AF Samsung TV

Thanks, I am measuring about 12 Ohms over the thermistor. what does that mean?...

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my-name-is-john replied to Samsung 75 LED UN75F6300

in Troubleshooting TVs and Video Sources

02-04-2021, 11:32 AM
Re: Samsung 75 LED UN75F6300

UPDATE: FIXED LED STRIP on 75"TV !!!
First, I need to say, my UN75F6300 is a bit unique. When we first bought it, it was our third TV in three months. My ~5 year old son at the time loved throwing things and in the span of a year had broken: A cell phone, a digital camera, a game controller, and two large LCDs on TVs. For protection, we put Velcro adhesive around the perimeter of our UN75F6300 and attached the thinnest piece of Lexan (020?) Amazon had. I say this only because I *THINK* having this added material on the TV helped with stiffening...

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my-name-is-john replied to ID parts & troubleshoot a short - UN75F6300AF Samsung TV

in Troubleshooting TVs and Video Sources

01-26-2021, 12:43 PM
Re: ID parts & troubleshoot a short - UN75F6300AF Samsung TV

Thanks Bruce! I'll check the cables when I take apart the TV to replace the LED strip that went bad (should have parts in two weeks). I didn't see any signs of arching on the power supply side of the connector though.

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my-name-is-john replied to ID parts & troubleshoot a short - UN75F6300AF Samsung TV

in Troubleshooting TVs and Video Sources

01-22-2021, 02:03 PM
Re: ID parts & troubleshoot a short - UN75F6300AF Samsung TV

LOL agreed. After the initial capacitor replacement didn't work, I gave up and ordered a new board. It's just eating at me that it's not working though, so I have to figure it out...

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my-name-is-john started a topic ID parts & troubleshoot a short - UN75F6300AF Samsung TV

in Troubleshooting TVs and Video Sources

01-22-2021, 01:24 PM
ID parts & troubleshoot a short - UN75F6300AF Samsung TV

Hello!

I have a Samsung 75" UN75F6300AF TV. This [URL="https://www.badcaps.net/forum/showthread.php?t=68854&highlight=UN75F6300AF"]thread [/URL]shows good photos of the various parts, I'll post my photos of my issues which are:
1) Identify what this 'yellow nub' is on the back side of my power supply circuit board. Is it important? where do I get a replacement?
2) find a source / replacement part for this 15D050 thermistor.
3) What is this little black chip? does it look ok? how do I test it/replace it?
4) how else would I troubleshoot...

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Last edited by my-name-is-john; 01-22-2021, 01:36 PM. Reason: adding photos, typos.
my-name-is-john replied to New Members - please post your introductions here

in Announcements & Related News

01-22-2021, 12:03 PM
Re: New Members - please post your introductions here

hello, I'm pretty good at breaking electronics and melting solder.

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my-name-is-john replied to Samsung 75 LED UN75F6300

in Troubleshooting TVs and Video Sources

01-22-2021, 11:31 AM
Re: Samsung 75 LED UN75F6300

My TV (same model) has the same problem. Ordered strips off of Ebay and will be installing them soon. Will attempt the "suction cup" with 3-4 people to lift the LCD. Hopefully when successful will post pictures of a fixed LED strip (or will post a cracked 75" LCD panel).

Another note: this "DIM bar" happened a while ago on our TV. after about two months or so of the 'dim bar' the power supply blew (on Capacitor, the thermistor, and maybe something else). Not sure if the power supply was the issue, or if the bad...

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ID parts & troubleshoot a short - UN75F6300AF Samsung TV

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