LC420EUE - I am looking for a schematic of LCD matrix produced in Poland

Question

Good day. I am looking for a scheme of the LCD matrix produced in Poland, the LC420EUE SE F1 model. Does any of the honorable men have one? greetings

mirex · Answer

Hmmm ..., and more broadly, what exactly do you mean? What do you want to achieve with this ... scheme?

kinkazu · Answer

I have a LG 42LM620T. A little water was sprayed in from behind at the bottom and the components on the PCB of the directly connected matrix tape were damaged.

I have a TV service manual. There are electronic diagrams of all discs with descriptions of elements, but the description of those connected to the matrix is not there.

I assume that I will find this information in the matrix service manual.

And then he will try to replace the elements that look damaged.

grubas · Answer

Forget about your friend Look for a new matrix (which is unprofitable) or rather a new TV.

lisek · Answer

Na matrycy plytka driverow czy T-conie (6870C-0401B T-CON 32/37/42/47/55 FHD TM120 Ver0.2 ) Jaki masz objaw na ekranie? ________________ Moze to sie przyda w poszukiwaniu

kinkazu · Answer

Hmm, why? I can not find the instructions?

lisek · Answer

Bo to modele z 2012r. Stosowano 1.uniw. PSU+kontroler LED - EAX64427101 (1.4) (EAY62608901) dla 42LM620T matryca LC420EUE (SE) (F1) 2. MAIN 42LM615T-ZE.BRUWLJU EBR75226869 EAX64317404(1.0) G4_L_TU123 chassis LD21B/LC21B ,matryca LC420EUE(SE)(F1)

kinkazu · Answer

On the matrix:

Added after 1 [minutes]:

The second tuner looks the same, these 2 elements of the middle are as if drowned. You can not see the silver bar.

Added after 2 [minutes]:

On the screen the night, the sound is, T-CON's water did not reach. It was really unpracticed in the holes at the bottom of the TV. only the matrix drivers were on the way, nothing more. I can buy T-CON, because they are on eBay, but what's after me, like the matrix was falling.

lisek · Answer

Which elements?, They have numbers.
Measure the voltage that I gave, draw conclusions.
After all, with T-con on this small plate goes the connector (thin wires) can something upalilo / break?
Voltages from Tcon are "transposed" into a small plate
_______________
Open, zassaj ( right side up> symol strzalka w dolne )> maybe from these "bushes" you can hear TV on the same matrix as yours
Link

(' :!:

') I'm sorry to write with a paw from UK Win, my home system was easy

kinkazu · Answer

With T-CONA go 2 tape, one to the left the second to the right driver. each of the left or right parts has 3 tapes straight from the plate to the LCD. The tiles were wet. Some of the elements look worse than others. I will make a more detailed picture.

kinkazu · Answer

Thanks for the instructions. The problem is that both yours and mine do not have a matrix electronics scheme.

Instructions for 42LM620T here:
http://any-server.com/42lm620s_42lm620t_42lm625s_chassis_ld22e.pdf " target="_blank" rel="nofollow noopener ugc" class="postlink inline" title="" > http://any-server.com/42lm620s_42lm620t_42lm625s_chassis_ld22e.pdf

I counted on something similar to this:
http://any-server.com/LG_Display_LP125WH2-SLT2.pdf " target="_blank" rel="nofollow noopener ugc" class="postlink inline" title="" > http://any-server.com/LG_Display_LP125WH2-SLT2.pdf

I need to find a camera with a better macro function.

Added after 7 [minutes]:

Elements that I suspect I need to replace, I have circled a colic. There are a little more of them, but they look the same.

kinkazu · Answer

Elements on C136, C133 look different than C104. For me, they look like for exchange.

śfinkamorska · Answer

As for me, a stave master is here for a definite exchange.

kinkazu · Answer

I'll give advice, it's progress.

satgal · Answer

You have to express yourself precisely in electronics. The dot and comma are of great importance. Does a friend imagine a matrix diagram where there are several million transistors and connections. The dies manufacturer does not provide components from which he assembled the matrix treating it as the most guarded secret, but only a pdf manual for tv producers needed to design it to work properly. What has a colleague's objections to these capacitors blocking the power supply can look like this when they were wet, but most importantly, they do not contain and this can be easily measured.

kinkazu · Answer

Thank you very much for a specific answer. I have just measured resistors on the left and right S-PCB capacitors and have the same values, i.e. the problem is not in the ugly capacitors, or maybe on the power board or d-ic. I'll look for more.

satgal · Answer

Like what do I have on the part of the beaten EUE matrix. It can be useful for measurements and comparisons eg tcon and tension on the strip.

kinkazu · Answer

T-CONA and PSU disc replaced, the effect is the same.
TV will take me to a specialist on Sunday and I hope that he will diagnose what is wrong.

Thanks to the great satgal. I am probably asking you for help.

kinkazu · Answer

The problem was solved after replacing the damaged capacitor, one of those in the picture. There is another, changing brightness in one of the corners of the matrix. On a bright background, you can see a flash every 2 seconds. A specialist colleague said the fault lies in a damaged D-IC and I will not repair this at home. Thank you very much for the help of Satgal. Regards and upcoming next time

LC420EUE - I am looking for a schematic of LCD matrix produced in Poland

Post #1

Post #2

Post #3

Post #4

Post #5

Post #6

Post #7

Post #8

Post #9

Post #10

Post #11

Post #12

Post #13

Post #14

Post #15

Post #16

Post #17

Post #18

Post #19

Topic summary