How to change the SCART socket on a TV?

Hello everyone
This is a former from the after-sales service who slips you a word about bad contacts in the "SCART" sockets.
It is simple to carefully redo the soldering on the circuit board. Indeed, the SCART of a TV "holds mechanically" with the solder on the circuit board, but after a few years of "rough handling" the solders crack. This can be seen under a magnifier where you can notice a micro groove around the SCART pin that passes through the circuit board. Have you been to high school? and surely you had to learn to use a small soldering iron in technology. It’s simple, recharge with new solder (60% tin) the broken solder joints and that should solve your bad-contact problems. WARNING: observe carefully before doing anything the silkscreen (drawing) of the printed circuit board. If there is not a broken "rail" in which case at the break you must scratch the varnish and apply a bit of new solder as a "bridge" over the break, a small strand of copper from a multiconductor electrical cable would be preferable.
about reflowing the solder: DO NOT make blobs, that is, do not put too much tin under the risk of causing short circuits between pins that do not need to be connected to each other.
Here is a little patient job to do with a lot of care you will be rewarded yourselves. One last word and I should have started with: ANY INTERVENTION IN A TV must be done with the TV unplugged and the power outlet removed
P.S. the soldering iron should have a tip (tin fusion tip) of very small size to allow a sufficiently precise job at the soldering point.
2nd P.S. Also look inside the SCART connectors of your cables if all the pins are at the same level of protrusion, some pins that are not well locked tend to slip back in the guide support and thus cause bad contacts.
bye

Hi Irukandji,

Thank you for your quick reply.

You're talking to align the peritel; I’m good with that, it should be doable. But cleaning the jack will be tough.

I tried to nudge the jack at the back as if to remove it, and I managed to get sound briefly, but as soon as I moved the TV, the sound came back and there’s no way to get it again even when the TV is in place. It’s weird.

Tell me, isn’t it possible to desolder the jack to replace it? Is that really a job for a craftsman?

Thanks again.

hello to you mathis39
i had the same problem and i think you won't be able to do much, the pent tõ peritel socket on the television is soldered onto a circuit board, unless you get the repair done by a tv technician.
i fiddled with it using shims and glue. On three televisions i had the same problem.
bye.

sorry i misinterpreted my problem;

please excuse me.

to get the image from the decoder you have to block the peritel up or down but to get the sound it’s better if i move it back a little or even put it a bit diagonally to get the sound, well before it worked like that.

thanks and sorry for the gibberish.

regards

one last thing and aprt i’m waiting for your answers.

i just switched to AV on the TV i have a worse image but no sound and the demodulator is at full blast ?

there you go, that’s all.

Hi Mathis
yes, this can be a job for a craftsman. The SCART connector has 21 pins. Unplug your TV, and open it. Be careful not to move your hands anywhere it could be dangerous, and look at how the SCART plug is connected to the circuit board, and you’ll see that it’s not obvious.
on three TVs it was impossible to do.
bye

hello bernorenard
thank you for your help, I hope that with your advice he will be able to get by
hi to you.

Hello
reply to post 8
No you must disconnect the tube from the socket under the suction cup only with the TV off, and if you have to work on this suction cup on the top behind the tube or replace the TH T triple (tripleur) of the tht. You must take a few precautions for this. An insulated electric conductor is enough, like a metrix cord for example. One end is connected under the tube's earth braid and the other side you slide it under the suction cup to touch the metallic aris (rust) that hides under the plastic suction cup. That's all, and if you don't put your fingers where you shouldn't it will be fine, but I have suffered shocks like that in the past when I was younger; I resisted but it’s strong!
Hi

Sorry about the typos, it might be from the numerous prunes I’ve taken in my TV repair career! It surely destroys the neurons and afterward you make typos, you mustn’t age.
hello

I heard that to redo the soldering you also have to connect the iron’s body to the TV chassis to avoid frying the IC... Is that correct?

Hello
Maybe not for the CI of the peritel which is simply a multiple switch. these are the components of the MOS family, MOSFET and CMOS that are very vulnerable to static currents.
Hi

Okay, thanks bernorenard!
So it’s enough to give it a little lick with the soldering iron and then redo nice welds ??
Do we need to discharge a capacitor for that?
Do we have to remove the board where the connector is soldered on or not?
Can we change this connector?

Here it is open but what should I do now ??
I'm afraid of getting a nasty shock the ...
Discharging which capacitor how ?
Where are the different components of the TV located ??
here are the photos:
http://www.heberger-image.fr/images/69719_DSCN0859_1_.jpeg.html
http://www.heberger-image.fr/images/73980_DSCN0860_1_.jpeg.html

Hello
Where are you going? what do you plan to do? replace the chassis SCART connector?
is it really bad or completely destroyed?
Wouldn’t there be under the copper side a “crack” in the printed circuit, caused by mechanical forcing on this connector?
This is what happens most often!
It’s very delicate, assess your risks (the TV is off for a while)
You can lay the TV on its front on a cover (stability) inspect with a loupe the copper rails of the printed circuit that go to the SCART connector (you identified it) there may be a visible crack under the loupe or tin around the pins that go through the printed circuit. In this case with a small 40W soldering iron and a bit of solder reheat the old solder, at the right temperature apply a bit of new solder that will cover the connection and that’s all.
BE CAREFUL not to solder together several neighboring contacts of this SCART connector that should not be soldered together (short circuit)
Replacing the complete connector requires professional skill and workshop rework tools, plus there is a serious risk of breaking the printed circuit or nearby components!
Cheers

Yes, so I’m simply going to redo the welds or check if the circuit board has not been damaged, and afterward I’ll check the connections in this plug because some supports can press into the plug...
Otherwise I think I just need to unplug the TV plug and that’s all to be protected?
Thank you
Hi

Don't put your hands anywhere else! You're in an area with weak current and if you see dust or something else nearby, don't go there. The danger is first the mains outlet—you need to unplug—and a little less the cathode ray tube and the flyback circuit, recognizable by its waxy white insulators that connect the tube to the compact chassis of your TV. You’ll see a broken solder joint—that’s obvious. Just redo it and you’re done; close it up quickly and give it a try. Hi.

Okay, I’ll do that. I’ll let you know as soon as it’s done and especially if it’s working again. In any case, thanks!