Hi all, looking for some help diagnosing the powersupply / LED driver on some tvs. I have 5 of them all with the same issue that are out of warranty and would like to fix for my customers.
Then powering on the TV the backlight will blink on then turn off untill the next power cycle. The LED driver output will go to proper voltage(200Vdc) for less than 1sec then drop to under than 10v. Will do the same thing is leds are disconnected.
BL_ON has 1.5ish volts
LED Strips all turn on with a tester. one of the tvs does have a dead strip.
Seems like it uses a Switch mode power supply but cant find schematics and
am hitting the edge of my knowledge.
Any help would be appreciated.
https://drive.google.com/drive/folde...kU?usp=sharing
Then powering on the TV the backlight will blink on then turn off untill the next power cycle. The LED driver output will go to proper voltage(200Vdc) for less than 1sec then drop to under than 10v. Will do the same thing is leds are disconnected.
BL_ON has 1.5ish volts
LED Strips all turn on with a tester. one of the tvs does have a dead strip.
Seems like it uses a Switch mode power supply but cant find schematics and
am hitting the edge of my knowledge.
Any help would be appreciated.
https://drive.google.com/drive/folde...kU?usp=sharing
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