Samsung UN60EH6050F Sound-no picture

[budm]

Re: Samsung UN60EH6050F Sound-no picture

Black probe of the meter on the chassis GND, the Red probe on D1+, D1-, D2+, D2-.
Your power supply board is not the same as in the Video, you have two sets of LED strings with its own boost converter and its own MOSFET for each string of the LED. The board in the Video has one string of LED.
So set your meter to higher Voltage scale and take the readings again.

[eychin]

Re: Samsung UN60EH6050F Sound-no picture

Thank for your help. I apologize for not getting back in a timely fashion. i redid the measurement.

with the power on and the tab connected, the voltages are:

1. D1+ 26.0
2. D1+ 26.0
3. N.C 0.0
4. D1- 218
5. N.C 0.0
6. D2+ 26.2
7. N.C 0.0
8. D2- 219
9. D2- 219

with the power on and the tab DISCONNECTED, the voltages are:

1. D1+ 0.0
2. D1+ 0.0
3. N.C 0.0
4. D1- 300
5. N.C 0.0
6. D2+ 0.0
7. N.C 0.0
8. D2- 300
9. D2- 300

so, is this PSB good?

Thanks again.

[budm]

Re: Samsung UN60EH6050F Sound-no picture

Thank for your help. I apologize for not getting back in a timely fashion. i redid the measurement.

with the power on and the tab connected, the voltages are:

1. D1+ 26.0
2. D1+ 26.0
3. N.C 0.0
4. D1- 218
5. N.C 0.0
6. D2+ 26.2
7. N.C 0.0
8. D2- 219
9. D2- 219

with the power on and the tab DISCONNECTED, the voltages are:

1. D1+ 0.0
2. D1+ 0.0
3. N.C 0.0
4. D1- 300
5. N.C 0.0
6. D2+ 0.0
7. N.C 0.0
8. D2- 300
9. D2- 300

so, is this PSB good?

Thanks again.

It looks like you have D1+ D1-, D2+, and D2- all backward.
The D1+ pin is the Voltage feeding pin to the Anode of the D1 LED sting #1 which should be around 224V as printed on the board, D2+ pin is the Voltage feeding pin to the Anode of the D1 LED sting #2 which should also be around 224V.
D1-, D2- are the Cathode return for the two LED strings.
You are getting about 300V when no LEDs connected so that is correct.
So are you sure that you are not getting any backlights at all?
Pictures provided by shojimmy.
http://www.shopjimmy.com/catalogsear...?q=BN44-00500A

[eychin]

Re: Samsung UN60EH6050F Sound-no picture

i'm sorry i wasn't clear. the blacklights are on when the power is on and the tab is connected. the blacklights are not on when the power is on and the tab is disconnected. i see that i could have misinterpreted the orientation of the wires vis a vis the legend. if that is true, based on what you wrote, the voltage readings are correct. if they are correct, then the PSB is fine?