Re: problems with LG OLED 55EC930V, t-con board LC550LUD-LGP1
I measured C1615, it is 1.509V. The other side of L9 has a similar value, 1.52V.
U772 seems to be powered through R7590, one of its sides is also connected to C1608, where I can measure 5.1V.
The very bad news is that I bought a T-CON board from ebay and this does not work either. I also tried to test the 2.5V and also in this case I cannot measure anything.
Therefore there is a chance that maybe the 2.5V is enabled by something that is somewhere else and it is not working, I don't know...
randaz81
New Member
Last Activity: 10-26-2021, 08:58 AM
Joined: 10-02-2021
Location: Casella
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Re: problems with LG OLED 55EC930V, t-con board LC550LUD-LGP1
hi again, last week I was traveling. Here are the measurements:
C1606 = on one side I measured GND, the other side seems to be 0v/floating (maybe like the 2.5V test point?)
about VGL, I found a test point called VGL_SENSING at 1.9V, and a test point called EN_VGL which seems to be 0V/floating.
On EVSS_Con_out I measured GND.
Thank youLeave a comment:
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Re: problems with LG OLED 55EC930V, t-con board LC550LUD-LGP1
Hi! Here the results:
1.15v, ok
2.5v, missing!!!!!!!!!! (0v)
L8, 3.2V
Vpred, 6.56V
1.8v ok
1.8v burk, ok
C1554, 23v
C1516, 11.34v
VGH 23v
C1528, 16v
D44, 6.56v
VDD, 16v
F3 (both terminals), 11.33vLeave a comment:
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Re: problems with LG OLED 55EC930V, t-con board LC550LUD-LGP1
ok, sorry... I'm having bad times trying to make a clear single photo of the whole board with my phone.
So I did several pics, from left to right. Please tell me if it is ok... I can eventually try to use photoshop to assemble all the pics together but I'm not very familiar with it and it will take a while...
Thank you a lot...Leave a comment:
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Re: problems with LG OLED 55EC930V, t-con board LC550LUD-LGP1
Just a silly question, since I have never seen this type of flat cables. Can you confirm that the closed position is correct? I just placed the cable in position and closed the slot, without trying to force the cable inside any further....Leave a comment:
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Re: problems with LG OLED 55EC930V, t-con board LC550LUD-LGP1
>have you ruined the flat cables?
Hopefully no, I tried to be very gentle with them... (Btw, this is just my curiosity: there are four flat cables from the t-con to the panel. Does it mean that the panel is divided into four independent sections?")
>Why don't you publish photos
I attached some pics of the power supply board and the t-con board
>are you able to repair at component level?
I have good soldering skills, but I have no clue about what to replace......Leave a comment:
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Re: problems with LG OLED 55EC930V, t-con board LC550LUD-LGP1
@William1967
> There is a way to check whether the display or the t-con is the cause and that is to start the device in p-only mode, for this you need a service remote.
I'm waiting to receive a service remote. Then, after starting the tv in p-only mode, how can I distinguish if the problem comes from the panel or from the t-con?
Do you have any idea why before I was able to listen to the audio from the tv (with no video), while now I cannot anymore turn on the tv at all?Leave a comment:
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problems with LG OLED 55EC930V, t-con board LC550LUD-LGP1
I have an LG OLED 55EC930V.
The problem started a couple of days ago: tv working, but no video, only audio.
I opened the tv and I checked the parts. The mainboard has the red led on, which means that it working correctly. The power board supplies 24V correctly.
I focused my attention on the t-con board, LC550LUD-LGP1, I disconnected it to observe it carefully, no signs of damage. Then I mounted it again and I reconnected to the tv.
After this, the tv started to show a different behavior: it turns on and then, after few seconds, it turns off.... -
Re: New Members - please post your introductions here
Hello,
I'm a software engineer, working in the robotics field.Leave a comment:
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