So I picked up this 50UH5500 the other day.
When I power it up, the main board gets power for brief second, the backlights flash and then power shuts down to the Backlights and Main.
Testing the PSU-
With the Power plugged in
Power
pin 1- STB - 0 V
pin 2,3 - 0 V
Pin 4,5,6,7,8 - get 10.22 V
pins 9,10,11,12 - 0 Volts
where the LED plug is.
pins 1,2,3 - 88-89 Volts
pins 4,6 give 27-28 volts.
pin 5 - 0 Volts
Based on the LED pin voltages, I'm assuming i have a bad LED. However the weird thing that gets me is the STB being 0 V. I always thought they were supposed to be about 3.5 V.
Reading at ShopJimmy...that these TV's also really had a tendency to have LED Failure as well.
When I power it up, the main board gets power for brief second, the backlights flash and then power shuts down to the Backlights and Main.
Testing the PSU-
With the Power plugged in
Power
pin 1- STB - 0 V
pin 2,3 - 0 V
Pin 4,5,6,7,8 - get 10.22 V
pins 9,10,11,12 - 0 Volts
where the LED plug is.
pins 1,2,3 - 88-89 Volts
pins 4,6 give 27-28 volts.
pin 5 - 0 Volts
Based on the LED pin voltages, I'm assuming i have a bad LED. However the weird thing that gets me is the STB being 0 V. I always thought they were supposed to be about 3.5 V.
Reading at ShopJimmy...that these TV's also really had a tendency to have LED Failure as well.
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