Samsung tv problem led ligt ..

bokin021

I have burn some resistor ,i dont have schematic and i could not understand what was there i have pictures..Led lamp are ok..

mia

May be this help to you https://tel-spb.ru/remont-tv-lcd/samsun ... 00460A.pdf
https://elektrotanya.com/samsung_bn44-0 ... ad.html#dl

bokin021

No,cant help me because i dont see value if resistor,but anyway thanks.

mia

Not all resistors burned out. If on some you can read the markings, then others are the same.

bokin021

I cant read and i replace other resistor which are value ..But they are also burn now..Only schematic can help me..

bokin021

maybe can help me?

mia

In two branches of the circuit there should be three parallel resistors simultaneously of the same rating. If they continue to burn, and everything is ok with the LEDs, then increased voltage is applied, which is wrong.

bokin021

I dont know what resistore was there,i cant sre mark..I need value and then i will search issue..

mia

If you do not see the label, then try to measure the resistance of each of the remaining resistors in the photo.

bokin021

I mesure voltage it is 280 v but I wonder what is output voltage for lamps?I thing resistors Mark is 361 ..I m not sure ,because is not visible.

mia

Unsolder all problem resistors and measure the resistance of each.

bokin021

320 ,280 ohm

mia

Нow many resistors are 320, and how many are 280 ?

bokin021

two resistors are burn others are around 340 ohm ..

mia

Try solder all new with 330 ohm resistance and corresponded power dissipation.

bokin021

I change resistor but anyway burning..What more can be problem?

mia

If you put all six resistors and they burned out, then the current in the circuit is exceeded. This may be due to excess voltage source or lower load resistance. Try drawing a circuit by the PCB using reverse engineering. Why did you decide that the backlight diodes are working ?

bokin021

I put 2×1 ohm 2A resistor and know sometimes litle bit blinking,but it is ok..I hoppe will be good..Thanks lot for help!!

Samsung tv problem led ligt ..

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