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LG

LG 21FU1RK-LS TV is very bright.

Televisor LG - GOLDSTAR 21FU1RK-LS

Televisor LG - GOLDSTAR 21FU1RK-LS

Freddy38
hace 5 años
hace 5 años
One day the TV was turned on and I present this fault immediately, when the channel has a lot of red or blue it shows that the colors stand out from the image, as if it had a lot of brightness, here I leave you 5 photo of the problem, in advance thank you very much. IMG_2137.jpg [1.32MB] IMG_20171126_153400.jpg [609.95kb] IMG_20171126_153414.jpg [656.24kb] IMG_20171126_153425-1.jpg [483.88kb] IMG_20171126_153429-1.jpg [522.92kb]
nicomena2015
nicomena2015
9.501
hace 5 años

hello friend: if you have knowledge in repairing this type of tvs ... comment q, review and measurements do echo to try to uvicar the fault ... ok ... greetings!

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Freddy38
hace 5 años

Hello friend, I tell you that it is the first time that I see that fault, I do not know where to comment, all I did was move the potentiometer of the Flyback screen, and check some filters at the stage of it. I saw everything normal in the filters and improved a little when I moved the screen, but it really did not happen, since I have not had the experience with that fault, thanks.

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nicomena2015
nicomena2015
9.501
hace 5 años

if it is the mc-059C chassis ... the test of the screen is to turn the potentiometer clockwise until q, lines of delay appear ... there and you turn it back until q, they disappear ... if with that test no If the kite effect is gone, it can be an exhausted tube ... in that case, what you can try is to bridge the FR401 of 2.2ohm and see if it improves the image ... these tests are the most common to verify if it is tube deficiencies .... this would be if you have knowledge to do these tests ... comment results ...

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Freddy38
hace 5 años

I apologize for the delay in responding, I had technical problems with the Internet and communication, but here I am very grateful to everyone. To summarize the technical solution, I took the plate of the cathode ray tube and solved the transistors and other things that I saw with cold welding, when I turned on the TV it looked much better and I controlled the brightness and contrast by removing the kite tail. Very grateful to everyone for their comments.

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luis tartaglia
hace 5 años
hace 5 años
Hi. It is a ghost effect. Comet. Color shift. See if you get the color green too. Good review welding tube plate. Change the filters that work with the flyback to new. All from 160v to 250v. the chroma if it is 10uf x 250v pon 22uf x 250v. And see if it improves. try lowering the contrast and see if the image looks good. That will guide you to determine the fault. The tensions of each cathode- (KR-KG-KB), at the exit of the flyback 180v. You have to comment. It can be bad tube. That's why you have to control everything. It could even with another tube or control it. Also the rgb video signals. That they are almost equal.
luis tartaglia
hace 5 años

Yes Surely it will improve just or not the image when moving the scrin. Like regulating the brightness and contrast of the menu and reducing color.
And it will indicate the bad tube.

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