I have toshiba 46PX200ZE led tv which has a 64 led side backlight array.
The picture went black and I took out this side led array I found one of the leds
has gone bad as it would come on for a couple of seconds only. I photographed and discovered the bad led and tried to replace it with a 6.1 volt zener.
I was not able to make it work.
I was able to light the leds by applying about 3 volts on them. Now I cannot do so, even though they pass the diode continuity test on the multimeter.
Do leds show this even if they do not light up?
What can I do to repair this array? Has the circuit before it (inverter?) gone bad? By the way the connector to this has 5 pins so assume there are four 16 sets of leds.
Is a circuit diagram of this available?
Thanks.
The picture went black and I took out this side led array I found one of the leds
has gone bad as it would come on for a couple of seconds only. I photographed and discovered the bad led and tried to replace it with a 6.1 volt zener.
I was not able to make it work.
I was able to light the leds by applying about 3 volts on them. Now I cannot do so, even though they pass the diode continuity test on the multimeter.
Do leds show this even if they do not light up?
What can I do to repair this array? Has the circuit before it (inverter?) gone bad? By the way the connector to this has 5 pins so assume there are four 16 sets of leds.
Is a circuit diagram of this available?
Thanks.
