RCA LED52B45RQ Will not turn on

[nstlfrk]

So I have this unit and I can seem to pin point the issue. See pictures as well.

1. On the power board the right plug with the on/off seems to have all power as it should. The on/off even registers with the touch of the power button.

2. The bottom plugs that go to the LEDs measure around 80 volts. Is this correct?

3. When you press the power button the LED on the front does turn on red and stay on till you press the button again.

What am I missing or is there a common issue with these setups? Thanks in advance for any help regarding this.

[budm]

Re: RCA LED52B45RQ Will not turn on

Need higher resolution pictures, I cannot read the labels for the connector pins when zoom in.

[nstlfrk]

Re: RCA LED52B45RQ Will not turn on

Need higher resolution pictures, I cannot read the labels for the connector pins when zoom in.

Here are some. Thanks

[CapLeaker]

Re: RCA LED52B45RQ Will not turn on

still cant read nothing, same as before.

[nstlfrk]

Re: RCA LED52B45RQ Will not turn on

still cant read nothing, same as before.

Are there any other places you need?

[budm]

Re: RCA LED52B45RQ Will not turn on

Any pin labels for the LED connectors?
Also need straight shot of the bottom side of that power supply/LED driver board.

[nstlfrk]

Re: RCA LED52B45RQ Will not turn on

Any pin labels for the LED connectors?
Also need straight shot of the bottom side of that power supply/LED driver board.

Here they are and the LEDS + reads 75 to 80 volts

[budm]

Re: RCA LED52B45RQ Will not turn on

So if you leave the red probe on the LED+ and Black probe on the GND then turn on the TV, the Voltage on the LED+ did not jump up higher than 80V and then comes down to 80V later? The units look s to have 6 strings of LED and 6 LED controller circuits.

[nstlfrk]

Re: RCA LED52B45RQ Will not turn on

So if you leave the red probe on the LED+ and Black probe on the GND then turn on the TV, the Voltage on the LED+ did not jump up higher than 80V and then comes down to 80V later? The units look s to have 6 strings of LED and 6 LED controller circuits.

The highest the voltage went was 81.9 volts and when you press the power button to turn the tv off it gradually drops to nothing.

By the way the led lights up red for stand by when off but goes off with no other colors when the power button is pressed

[CapLeaker]

Re: RCA LED52B45RQ Will not turn on

Measure all 6 strings.

[nstlfrk]

Re: RCA LED52B45RQ Will not turn on

Measure all 6 strings.

All 6 measure the same.

[budm]

Re: RCA LED52B45RQ Will not turn on

You have 6 LED - for 6 strings of LEDs so ALL L- (3 per connector, pin 1, 2, 3 are L-, they are the Cathode return for each one the 3 strings) are all the same?

[nstlfrk]

Re: RCA LED52B45RQ Will not turn on

You have 6 LED - for 6 strings of LEDs so ALL L- (3 per connector, pin 1, 2, 3 are L-, they are the Cathode return for each one the 3 strings) are all the same?

Yes they all 3 (as in the red ones) on each plug measure the same. Is this a good thing?

LED+ Measure 81.9 The others do not.

[budm]

Re: RCA LED52B45RQ Will not turn on

NOPE, I am talking about the L-, there are 3 pins for three L- (L MINUS), PIN 1, 2, and 3 of each LED connector.

[nstlfrk]

Re: RCA LED52B45RQ Will not turn on

NOPE, I am talking about the L-, there are 3 pins for three L- (L MINUS), PIN 1, 2, and 3 of each LED connector.

Pins 1, 2, 3 all measure a ground. Pin 4 is open and pins 5, 6, 7 all measure 81.9 volts.

[CapLeaker]

Re: RCA LED52B45RQ Will not turn on

Is the backlight on?

[nstlfrk]

Re: RCA LED52B45RQ Will not turn on

Is the backlight on?

Nope

[budm]

Re: RCA LED52B45RQ Will not turn on

'Pins 1, 2, 3 all measure a ground. Pin 4 is open and pins 5, 6, 7 all measure 81.9 volts.' so WHAT ARE the DCV reading of pin 1, 2, and 3? We know that you are getting the 81.9vdc pin 5, 6, and 7 FEEDING the Anode of the LED strings but we still do not know what all three Cathode return DCV are on each connectors. I AM NOT going to keep on asking the same question over and over again. At which post you tell us the DCV reading of L- pin 1,2, and 3?

'Pins 1, 2, 3 all measure a ground.' What the hell does that mean?

I asked for L- and you keep giving us the L+ readings:
Quote:
Originally Posted by budm View Post
You have 6 LED - for 6 strings of LEDs so ALL L- (3 per connector, pin 1, 2, 3 are L-, they are the Cathode return for each one the 3 strings) are all the same?

Yes they all 3 (as in the red ones) on each plug measure the same. Is this a good thing?

LED+ Measure 81.9 The others do not.

The RED WIRES ARE L+

[nstlfrk]

Re: RCA LED52B45RQ Will not turn on

'Pins 1, 2, 3 all measure a ground. Pin 4 is open and pins 5, 6, 7 all measure 81.9 volts.' so WHAT ARE the DCV reading of pin 1, 2, and 3? We know that you are getting the 81.9vdc pin 5, 6, and 7 FEEDING the Anode of the LED strings but we still do not know what all three Cathode return DCV are on each connectors. I AM NOT going to keep on asking the same question over and over again. At which post you tell us the DCV reading of L- pin 1,2, and 3?

'Pins 1, 2, 3 all measure a ground.' What the hell does that mean?

I asked for L- and you keep giving us the L+ readings:
Quote:
Originally Posted by budm View Post
You have 6 LED - for 6 strings of LEDs so ALL L- (3 per connector, pin 1, 2, 3 are L-, they are the Cathode return for each one the 3 strings) are all the same?

Yes they all 3 (as in the red ones) on each plug measure the same. Is this a good thing?

LED+ Measure 81.9 The others do not.

The RED WIRES ARE L+

For some reason I was not catching on as I re read all your statements I still did not GET IT.. Sorry to frustrate you. I will take this reading over my lunch hour and report back.

Thanks for sticking in there and helping I do appreciate it.

[nstlfrk]

Re: RCA LED52B45RQ Will not turn on

BUDM

Ok all 3 of the L- pins on both connectors measure zero when the power button is pressed to turn on and the stand by led is off.