After repairing the melted connectors on the processor board, will the dumpster dive Samsung LCD TV work?
A quick follow-up video to this disaster:
https://www.youtube.com/watch?v=U7soJAFbKwY
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A quick follow-up video to this disaster:
https://www.youtube.com/watch?v=U7soJAFbKwY
Forum: http://www.eevblog.com/forum/blog/eevblog-794-samsung-dumpster-lcd-repair-connector-followup/'>http://www.eevblog.com/forum/blog/eevblog-794-samsung-dumpster-lcd-repair-connector-followup/
EEVblog Main Web Site: http://www.eevblog.com
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Support the EEVblog through Patreon!
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Hi Just a quick follow-up video to this Samsung Lcd dumpster-dive repair and if you haven't seen the previous videos are just linking this board that went horribly horribly wrong in the thermal oven when I tried to reflow it one boy was a complete success and this one with they're obviously the connectors not designed for the specific reflow temperature and/or time completely failed. So here's some photos if you haven't done scene of the previous connectors and they were just melted. Almost beyond usability. but I say almost because managed to shave off just a bit from the top here.
they're very brittle. I Don't know if the plastic was originally extremely riddled like that, but yeah, we're able to. uh, but certainly after it melted. incredibly brittle so we just cut off managed to cut off some of the top there.
saved these two connectors. Um, haven't tried to actually plug them back in, but we should be how to get the mating connector back in there I'm sure, but this Joule rope one here was yeah, beyond salvaging with the dual rows. all the pins were at the wrong angle and everything. So David Two chipped away at all of the all the plastic on there basically extracted all the individual pins and then we re soldered like actually manually play.
I'm not going to take this off because they could. Well, it's probably not bad, but I don't want to do it and we just manually. So we cut away all of the plastic on there and then manually inserted each pin back into the connector and then put it back into the board on here and resold it. it back in and each individual pin, of course, had to be individually pushed back in there.
So that was a bit tricky and it doesn't push it right in until you got them all lined up And with the dual row nature and the one millimeter pin pitch err, that was all very tricky business. And so we've already sorted that one in so that one should still work. That's the main power connector and we've got this one here, which is like the audio or something like that, not hugely important. Once again, we've just got the pins in there.
We couldn't salvage the outside plastic. so we're just using this female header as just a temporary thing to solder that in. Okay, just one trick with solder in these connectors. Back in, make sure you check the height of the mating connector I Don't actually have it here.
it's attached to the TV over there. but if we put that down flush, sold it flush like that, we wouldn't be able to plug in the plug in the header connector on the top of it. It's quite thick, so you've got to put a spacer in there. We've already measured it this little.
There we go. It's a little tape there. If we push that down, that should be just about the right thickness of the connector that's going to mate on there. So there we go.
We'll just hold that down. and flip it over and solder it. So there you go. It was soldered that one on and bingo We can pull that off and now we've got the correct height pin header again. you know we don't need the surrounding plastic. That's alright. You can, you know, and often you need these retention clips on the stop, vibration and things like that, but you know it's not really an issue. You could tape it on if you want.
You can glue it down or whatever once you know it's working. No problems at all. All right here we go. We're gonna switch it on.
Turn on the power. Dave There's no noise. No noise. Oh yes, yes, there was yes.
I I Heard the noise. That means the process is working. Hang on. We can see some backlight, hang on, wait for it.
Where's the stripy bits? I Can't believe it still works after reflow and they're coming back. They come back. Ah right, yeah, here they are. Yeah, yeah, no, sorry folks, didn't fix it.
There you go, we refloat both the T-con board and the processor board and they survived by the way with you know, melting those connectors, everything not a problem, it was just really wasn't over temperature in the oven as such for the for all the chips and everything else and they survived just fine. But those physical unit connectors weren't designed for that reflow temperature that we use there. but the board survived just fine and dandy. There you go.
So sorry. Nah, that's it. It must be the panel or something else with refloat bow. It could still be like a T-con board at fault or something like that.
I Think that's still the most likely scenario, but whether or not I'd buy another T-con board there like eighty hundred bucks or something like that. but by the time you land him here in Australia it's not. It's not really worth the gamble because we're not a hundred percent sure. So there you go.
Thumbs down for that dumpster dive. Oh well. hope you found the videos interesting. Catch you next time you.
My toshiba regza 2010 55 in 3d tv has the same problem
I would think he would get tcon 4 the sake of me ever ringing the bell 3 vids and all i got was ear raped
rrrrrrrrrrrrrrip
조립해야지
i don't see the panel as the problem, chase the idea of the t-con board personally, as when you fired it on, for about 20 seconds, there was NO lines, you didn't mess with heating the panel, just the boards, yet for 20 seconds NO lines, in my opinion, you would have immediately seen an issue in the panel so technically, i suspect one of the chips on the t-con board also, and possibly 3 or so solder joints to make them work aren't connecting properly
bad panel
No chance of moisture or residue???
I have a Samsung doing the same thing and I replaced T con board still no fix.
I have a Samsung doing the same thing and I replaced T con board still no fix.
I am considering buying a new LED TV, and I am concerned about build quality, and reliability, among Sony, Panasonic, Samsung, LG, and Vizio… Who do you think would be good choice… Like the vids… thanks
I'm not sure why people are commenting to analog problems. The menu and display are going to be purely digital. Use the scope and find the stuck bit on the bus.
If it is only ascii character that are do line, why not Turn it on, with monitor cable plug in, and the Text is only on screen for about 2 second, then it go away, so the lines not appear, and you can use it as monitor!
Why not just ask the manufacture what usually caused this problem?? Jack from China
Dave, have you tried to switch it off and on again?
😀
dam you guys need to fix it ok keep going find out whats wrong with it 😛
NNNNOooooooo. I was so sure. It made sense… :/
I'd love to see you do a component level repair on this. I'm sure you'd get the youtube views to make it worthwhile. I think its actually the most interesting series of videos you've done and that's comparing to some other pretty damned good videos.
Its a bad panel hands down, knew it from the start.. the 1st giveaway was the doubling up video that jitters. TAB failure within the panel itself. Repair tech here seen many dozens of these Samsungs are known for panel failures. replacing the t-con will NOT fix this issue I guarantee that
Iv watched videos of people who do component level repairs who say reflowing is basically a myth and have showed that the solder balls do not melt and reconnect. Now i'm confused that this is what you attempted to do…
Since the issue occurs around the ASCII characters, does it work fine if you have an input connected?
I.E. If you plugged in a computer or external set-top box would it work fine for those purposes?
Could the problem be temperature related?
Maybe the stripes only appear after a component(s) reaches a certain temperature. If thats the case, im curious which component(s) may be the culprit(s).
I had the exact same tv tried freezing everthing no change and tried heating with a heat gun while on. customer did not want to spend money on tconn so junked it wish I would have kept it this is a huge mystery you have stumbled on in the TV repair community. ya gotta figure it out.