Philips 55PUS7303 LCD lines

[lotas]

What kind of control do they have? These protective diode assemblies stand on the CLK lines, protecting them from static and voltage surges.
So I don't understand why you should advise changing the motherboard if the problem is not in it or in the software.

[Davi.p]

Good.. so the gate drivers seemed bad but not.. i think the replacenent diodes are important, we all days see how gate drivers dies.. here in this model there is an intelligent solution to avoid this to happen.. also is important to avoid touching the tv with naked hands especially on the bottom.. i suspect this is the way these faults happens.. Good Lotas..!

[Maalobs]

Aha, so the TVS diode, a "Transient Voltage Suppressor", acts as a surge protector for the next IC on the line.
There was a descriptive picture on page 2 in this application report from TI:



The marking in the pictures is 6514P, which appears to be a Semtech part, here it is a DigiKey and here at Mouser.
Mouser has a datasheet V3.0 from 2015, while I guess this is Semtech's own latest datasheet V3.4 from 2021.
I can't get a sense of the scale from the pictures in the thread, but the proportions seem to match the 2.5x1.0mm package type.

Anyway, is this part supposed to protect the next IC by dying?
It seems wierd to me that the surge protector is commonly killed by ESD. 💀
On the other hand, the maximum voltage defined in the datasheet is 120V, so if ESD kills it, I guess it's still sensitive to high voltage even if the current is low.

[SMDFlea]

Don't buy any board unless a gift from Diah!! Bad screen, but some clever tinkerer can obtain an usable set from this..

You will be banned if you keep goading.

you are wrong 1 too.... look on the first post when TV boot logo, and screen when half screen test... how it come you will be as the other asshole.

Both you and Davi.p can stop being assholes, you can agree to disagree and leave it at that.Lotas deserves an apology.

[rtstorm]

Ahh, my happiness was short. TV worked like 1h and than i got this lines again and after resetting TV the screen was black with backlight.

edit:
i fond this burned on left side of panel where i removed the diodes

[lotas]

Your ceramic capacitor has burned out (shorted), this happens often, remove its remains, clean the area and replace the resistor.
It's not clear here, it's hard to see, isn't this solder residue?

[rtstorm]

This is burned trace not solder residue. The cap is not shorted. I removed it but not the burning happens on seconds 0 Ohm resistor. I dosconect that part of LCD and other side show error like grom begining

[lotas]

So there could be a short in this place, if not the capacitor

[rtstorm]

I remove the caps but the short are in layer of board

[rtstorm]

I found a short but now i have this on screen. I think i am giving it up

[Diah]

please don't advice some things you didn't try or faced before... its just to avoid harming users devices.. its absolutely no fun at it and who enjoy it then need to visit clink soon.

[Diah]

You will be banned if you keep goading.



Both you and Davi.p can stop being assholes, you can agree to disagree and leave it at that.Lotas deserves an apology.

if you are going to delete this post again and don't delete yours... no more reason we can be here as you abuse your Admin power........
copy from deleted post.....
don't be rude for users in name you have admin power... show grateful to people spend time to help other... this is technical forum not chatting one... who knows and tried before some things helping threat welcome always.. but to harm users devices no place here... this what i do understand....over all the forum when links for youtube or other crazy stupid ideas linked in threat to run tests ... the end users devices went to trash. same this one.. do you call yours self ADMIN when this happened !!!!! so funny.

[lotas]

please don't advice some things you didn't try or faced before... its just to avoid harming users devices.. its absolutely no fun at it and who enjoy it then need to visit clink soon.

I myself removed these diodes more than once and there were no problems, I gave advice here on this forum to four people with this problem and they were happy (these topics were not saved, it's a pity), I gave a link to YouTube for reference, and your advice to buy and replace the working motherboard and the panel would work...

That's about it
https://www.badcaps.net/forum/troubl...7e-la?t=118195

https://www.badcaps.net/forum/troubl...cture?t=118339

[Diah]

I myself removed these diodes more than once and there were no problems, I gave advice here on this forum to four people with this problem and they were happy (these topics were not saved, it's a pity), I gave a link to YouTube for reference, and your advice to buy and replace the working motherboard and the panel would work...

i don't have any things against you... we are talking on issue i did talked about it before FREQ... TV depends on this part... not cut this or mask that---i am sure you know that...
i could be wrong too... no one perfect... but we relay our mind and thinking on yourube or other crazy stupid one one to run SMPS PSU with 1X 2.6V batteries which over all net and here too to find !!!!

at the end who said over here this fault with out testing method advised he should keep silent including me.

[rtstorm]

Hey, today i got the same model but with horizontal black line on tho bottom of the screen. After testing i found that one line was shorted to the ground and this line is coming from T-con board 55T32-COL CTRL BD. I order another one and waiting for it, hope it will fix the issue. I will post the result

[nomoresonys]

Well since I spent time reading the thread, I'll just say I've learned MORE from the electronic GENIUSES on youtube, than anywhere else, granted there are a lot of people there that don't know what they are doing BUT there's plenty that know whats up x 1,000,000. Now I could show 10 examples right now but I'll let folks find them like I did, more fun that way. There were at least 2 such youtubers that BudM referred to a lot, I'm sure many members know who they are. This would be a much better site if WE ALL could just check our egos when we log in and hold until we log out. I have been guilty of it myself of course but I'm not the biggest offender. It is kind of sad when every debate turns into a war.

[nomoresonys]

And even the pros are wrong from time to time, unavoidable, as long as it isn't a lot like some members that we know who they are. It takes a real mentally challenged moron to keep harping about an error when they also make them but FAR more often. Diah has always done a great job here, anyone trying to run him down is just jealous of his knowledge.

[rtstorm]

Well i got the part but the issue is the same, still lines on lcd panel. I tried to remove the diodes on the end of the but that also did not help. I guess than the issue is in the lcd panel

[nomoresonys]

Any update, did you try taping this new one that you acquired?

[rtstorm]

Yes i try that, no help. I return the TV to friend.