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LCD TVs - LED

Tv / monitor Samsung LN-S1951W replace main invert by another circuit

rogerjosue
rogerjosue
4.392
hace 5 años
hace 5 años
Good morning colleagues from the forum, I am requesting your help to repair the described TV, the flaw that it presents is that when you turn on the image appears and after a few seconds the lamps go out but the video remains, when checking the voltage output of the board inverter that goes to the lamps the voltage appears when turning on and seconds later disappears, but the voltage input of the inverter remains present, this made me suspect that it could be that some of the lamps were causing over consumption and that is why they turn off, but there is a behavior that stopped me from uncovering the screen to check the lamps and that is that by heating the inverter plate that is responsible for providing the voltage for the lamps, the TV stays permanently functioning normally; Now I have the certainty that the inverter plate is damaged but I can not get another one, so I would like to know if there is any way to replace that inverter plate without having to change the lamps and that the TV continues to work. I have some images to better illustrate the question, in advance I am very grateful, see you later. 1.jpg [2.07MB] 2. attach / attach_25.png [/img] 3.jpg [2.28mb]
foxifern
hace 5 años

if you do not repair, there are those plates for sale on the net

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wilson sepulveda
hace 5 años

check the ballasts well look at this https://www.youtube.com/watch?v=HXyFJTLnbFQ

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foxifern
hace 5 años

This video is about adapting a different coil from the original one, your problem is in the ic controller that has to be replaced.

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Victor E
Victor E
65.783
hace 5 años

Eliminate the protection of the integrated circuit controller and solve your problem. What integrated is? in the photos the code is not appreciated.

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rogerjosue
rogerjosue
4.392
hace 5 años

Good afternoon colleagues, thanks wilson sepulveda for the video, only in my case the TV does not turn off for protection; Thank you very much Victor E, that is what I need to know how to make the lamps no longer go out, the integrated one has the license plate FAN7311 and you can download the datasheet from here
http://pdf1.alldatasheet.com/datasheet-pdf/view/102015/FAIRCHILD/FAN7311.html
I have the TV on since nine in the morning and it is five and 45 in the afternoon and the lamps do not go out

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Victor E
Victor E
65.783
hace 5 años
hace 5 años
Just add a 560 ohm resistor on pin 1 and ground and turn off the protection.health
rogerjosue
rogerjosue
4.392
hace 5 años

I'm looking for resistance, I'll tell you in a while

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rogerjosue
rogerjosue
4.392
hace 5 años

Excellent Victor, I put the resistance and turned on normal, I thank you with all my heart your help, see you later

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