Samsung UN46EH6000 LED ERROR Codes

[budm]

Re: Samsung UN46EH6000 LED ERROR Codes

See updated post 21 on how to rest each LED. Anode is Positive.

[Michale32086]

Re: Samsung UN46EH6000 LED ERROR Codes

Looking at the bottom side of the board, I can see that the connector for the LEDs are setup for driving ONE LED string (only has one boost converter circuit, Q9102, D9102, L9101, C9110) so if one LED is open circuit, then you will not see any LED flash on at all.

OK, so it's like an old-style string of christmas lights... If one bulb is bad, NONE work...

Right???

Extrapolating from that (bear with me, this is all new ) than I can assume that ALL strips must be populated with working strips or none will work..

In other words, I can't put just one in for testing purposes as they all have to be in and they all have to be working..

That sum things up???

[budm]

Re: Samsung UN46EH6000 LED ERROR Codes

Looking at the bottom side of the board, I can see that the connector for the LEDs are setup for driving ONE LED string (only has one boost converter circuit, Q9102, D9102, L9101, C9110) so if one LED is open circuit, then you will not see any LED flash on at all.
You can test each LED using 2 AA batteries connected in series feeding in to 100 Ohm resistor to limit the current to power up each LED.

[Michale32086]

Re: Samsung UN46EH6000 LED ERROR Codes

Does the voltages in post #6 provide any clue??

EDIT: Actually, #6 just provides a continuity diagram..

Would checking voltages help???

[Michale32086]

Re: Samsung UN46EH6000 LED ERROR Codes

Because it is most likely an open circuit LED in the panel. This is by far the most common fault with LED TVs and is making many of them really difficult to fix.

I don't really know how you'd go about fixing an O/C LED in something like an 70" panel... 46" sounds bad enough.

I thought about that.. That maybe one of the strips was bad.. So I took one out and tested..

No luck..

Took another out and tested again..

No luck...

And so on and so on until there was only one left...

I then put them back in, in reverse order and tested again after each install..

No go..

What about the idea of buying a new strip that's (assumed) good?? And use it to test each strip connection??

[tom66]

Re: Samsung UN46EH6000 LED ERROR Codes

Because it is most likely an open circuit LED in the panel. This is by far the most common fault with LED TVs and is making many of them really difficult to fix.

I don't really know how you'd go about fixing an O/C LED in something like an 70" panel... 46" sounds bad enough.

[Michale32086]

Re: Samsung UN46EH6000 LED ERROR Codes

Also, this is the 3rd Power Board I have put in the unit...

The one that was initially in there..

One I had flying around my shop of unknown operability..

And the third one that's in there now that I had purchased from Shop Jimmy...

All gave me the same results...

[Michale32086]

Re: Samsung UN46EH6000 LED ERROR Codes

OK, I look at the picture myself:
Pin 6 = BL ON/OFF = 2.9V = OK, it should be <1V when TV is turned OFF.
Pin 14 = PWR ON/OFF = 3.2V = OK, it should be <1V when TV is turned OFF.

I am not sure but it might be indicative of the problem.

I can't seem to turn the set off...

When I plug it in, I hear the Samsung Tones that indicates power up..

Looking at the INPUTS area, the red light is on in the OPTICAL AUDIO connector which I have always associated with the TV being ON...

Pushing the power button does nothing to change anything..

Totally disconnecting the Video Board (and, hence, the power button) produces the voltages I outlined above...

[Michale32086]

Re: Samsung UN46EH6000 LED ERROR Codes

Can you please put the pin labels next to the readings?

My Bust....

1 B13v 12.8v
2 PWM_DIM 3.1v
3 B13V 12.8v
4 B13V 12.8v
5 Vamp 12.8v
6 BLU On/Off 2.9v
7 Vamp 12.8v
8 GND 0
9 GND 0
10 GND 0
11 B5V 5.3v
12 A5V 5.2v
13 B5V 5.3v
14 Pwr On/Off 3.2v

[budm]

Re: Samsung UN46EH6000 LED ERROR Codes

OK, I look at the picture myself:
Pin 6 = BL ON/OFF = 2.9V = OK, it should be <1V when TV is turned OFF.
Pin 14 = PWR ON/OFF = 3.2V = OK, it should be <1V when TV is turned OFF.
So the main board is sending out correct signal to turn on the power supply and the backlights circuits.
The problem is on the power supply board some where, the backlights should at least flash on for a second for the error detection circuit to detect any fault before going into shutdown.
What DC Voltage do you get at THE TWO LEGS of the main filter cap (82uf 450Vdc) when power switch is activated?
Pictures are provided by SHOPJIMMY.

[budm]

Re: Samsung UN46EH6000 LED ERROR Codes

1- 12.8v
2- 3.1v
3- 12.8v
4- 12.8v
5- 12.8v
6- 2.9v
7- 12.8v
8- 0
9- 0
10- 0
11- 5.3v
12- 5.2v
13- 5.3v
14- 3.2v

Plugged in, power switch activated makes no difference... From the tones I am assuming that the TV is activated once it's plugged in..



Nope... Dead as a doornail...

Can you please put the pin labels next to the readings?

[Michale32086]

Re: Samsung UN46EH6000 LED ERROR Codes

6 blinks means nothing.

It is the normal Samsung power up routine. Every Samsung TV does the same. Anywhere from 4 to 10 blinks seems normal.

Ahhhhh Hokay, I get it now..

Blinks can be ignored...

[Michale32086]

Re: Samsung UN46EH6000 LED ERROR Codes

What DC Voltages do you get on the connector CNM803 pins when TV is OFF and when power switch is activated? There are label for each pin.
http://assets.shopjimmy.com/media/ca...498a-top_1.jpg

1- 12.8v
2- 3.1v
3- 12.8v
4- 12.8v
5- 12.8v
6- 2.9v
7- 12.8v
8- 0
9- 0
10- 0
11- 5.3v
12- 5.2v
13- 5.3v
14- 3.2v

Plugged in, power switch activated makes no difference... From the tones I am assuming that the TV is activated once it's plugged in..

Also if you disconnect the CNM803 and then plug the TV into the outlet, do you get backlights?

Nope... Dead as a doornail...

[tom66]

Re: Samsung UN46EH6000 LED ERROR Codes

6 blinks means nothing.

It is the normal Samsung power up routine. Every Samsung TV does the same. Anywhere from 4 to 10 blinks seems normal.

[budm]

Re: Samsung UN46EH6000 LED ERROR Codes

What DC Voltages do you get on the connector CNM803 pins when TV is OFF and when power switch is activated? There are label for each pin.
http://assets.shopjimmy.com/media/ca...498a-top_1.jpg
Also if you disconnect the CNM803 and then plug the TV into the outlet, do you get backlights?

[Michale32086]

Re: Samsung UN46EH6000 LED ERROR Codes

As the saying goes, "Curiouser and Curiouser..."

I took out all of the light strips shown in post #4... Powered up and still got the same result. 6 blinks on the power LED...

So, I tried something I probably should have done BEFORE I disassembled this unit down to bare tacks...

I pulled the connector (Post #7) that goes from the power board to the LED strips shown in post #6...

Plugged in and still the same 6 LED blinks..

Which leads me to believe that the short is NOT in the LED strips....

The only other possible culprit is the video board...

But that doesn't make much sense...

Does it??

[Michale32086]

Re: Samsung UN46EH6000 LED ERROR Codes

Attached is the other side of the connector shown in the post above...

[Michale32086]

Re: Samsung UN46EH6000 LED ERROR Codes

Thanx, budm...

Yea, I had to hook up the video board anyways to have the ON/OFF switch in play, so I went ahead..

Found something interesting. Hopefully the smoking gun...

Using a voltmeter I determined that there were no direct shorts and the connections were laid out as indicated in the attached Pic..

"Now, I don't know what all that means, but it sounds pretty bad."
-Tom Cruise, A FEW GOOD MEN

[budm]

Re: Samsung UN46EH6000 LED ERROR Codes

Yes, you can power up the TV without the T-CON and the LCD panel attached.

[Michale32086]

Re: Samsung UN46EH6000 LED ERROR Codes

OK, got the unit disassembled down to the bare LEDs

Interesting arrangement.. Looks like a padded room I have been in once or twice.

I re-seated the connector to the LEDs and want to hook up the power board to see if I get light..

Is it wise to hook up just the power board without the video or TCON boards??