Re: Samsung un55js7000 no power
Are you talking about these 4 black caps 22uF 400VDC?
https://www.badcaps.net/forum/attach...5&d=1597966857
If that is the case, you should not be seeing <1V at the LED connector, but then I do not know where you put the probe leads at.
The exposed pin of the LED connector you see on the top side of the board are the odd number pin, pin1 is marked with whit triangle.
Pin 1 is 2+ which is the Anode of LED STRING #2.
Pin 5 is 2- which is the Cathode of LED STRING #2.
Pin 9 is 1+ which is the Anode of LED STRING #1.
Pin 13 is 1- which is the Cathode of LED STRING #1.
Bottom line, if those Voltages on the those 4 LED power supplies filter caps show 390VDC, that means you have open circuit in the LED strings some where due to bad LED's (more than likely), connectors that link the LED strip together, etc.
BTW, you can see the LED Voltage chart printed on the board close byt he connector that goes to the main board. The two LED strings are not the same, one has more LED's than the other.
Originally posted by Foofles
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https://www.badcaps.net/forum/attach...5&d=1597966857
If that is the case, you should not be seeing <1V at the LED connector, but then I do not know where you put the probe leads at.
The exposed pin of the LED connector you see on the top side of the board are the odd number pin, pin1 is marked with whit triangle.
Pin 1 is 2+ which is the Anode of LED STRING #2.
Pin 5 is 2- which is the Cathode of LED STRING #2.
Pin 9 is 1+ which is the Anode of LED STRING #1.
Pin 13 is 1- which is the Cathode of LED STRING #1.
Bottom line, if those Voltages on the those 4 LED power supplies filter caps show 390VDC, that means you have open circuit in the LED strings some where due to bad LED's (more than likely), connectors that link the LED strip together, etc.
BTW, you can see the LED Voltage chart printed on the board close byt he connector that goes to the main board. The two LED strings are not the same, one has more LED's than the other.
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