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Samsung UN32N5300 SmarTV -2018

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  • jason123
    replied
    Re: Samsung UN32N5300 SmarTV -2018

    Originally posted by vinceroger69 View Post
    I would of swapped the cap from the replacement board to the faulty board as a quick test, these type of capacitors we see a lot failing on psu s on various samsung threads
    in hindsight, that would have been the smart thing to do. As noted earlier, I didn't see the issue with the board in earlier pictures. Given the cost of this cap, I'll go ahead and order it and report back.
    Thank you

    Leave a comment:


  • vinceroger69
    replied
    Re: Samsung UN32N5300 SmarTV -2018

    I would of swapped the cap from the replacement board to the faulty board as a quick test, these type of capacitors we see a lot failing on psu s on various samsung threads

    Leave a comment:


  • jason123
    replied
    Re: Samsung UN32N5300 SmarTV -2018

    Originally posted by dskall View Post
    Funny it didn't look bulged in first pictures. Now you have a board that you could compare voltages on. Suspect maybe bad processor or firmware.
    So you don't think this cap has anything to do with it? The TV is buttoned up, and I did all the comparisons I could.. nothing obvious.

    Leave a comment:


  • dskall
    replied
    Re: Samsung UN32N5300 SmarTV -2018

    Funny it didn't look bulged in first pictures. Now you have a board that you could compare voltages on. Suspect maybe bad processor or firmware.

    Leave a comment:


  • R_J
    replied
    Re: Samsung UN32N5300 SmarTV -2018

    The cap is usually used to connect the transformer winding to ground. digikey should have them

    Leave a comment:


  • jason123
    replied
    Re: Samsung UN32N5300 SmarTV -2018

    The only thing that I could find suspicious about the board, is this 630V Cap that is swollen and the epoxy cracked as shown in photos. It's not shorted, and it has about 2.2 nF measured capacitance. Any idea where I can get a replacement if you think it might be the culprit?

    I do have a board installed in the TV and it's fine.. Would be nice to fix this one.
    Thanks
    Attached Files

    Leave a comment:


  • dskall
    replied
    Re: Samsung UN32N5300 SmarTV -2018

    You might want to read some part# off of 8 pin chips around your processor. Maybe multi voltage regulator chips.

    Leave a comment:


  • dskall
    replied
    Re: Samsung UN32N5300 SmarTV -2018

    And the other t-con voltages?

    Leave a comment:


  • jason123
    replied
    Re: Samsung UN32N5300 SmarTV -2018

    Originally posted by dskall View Post
    Getting voltage to t-con? Data going out on lvds? Voltages on t-con?
    Getting voltage to TCON - 12V on both sides of the fuse. 3.2V is on TCON also. Initial activity on the LVDS but then nothing

    Leave a comment:


  • dskall
    replied
    Re: Samsung UN32N5300 SmarTV -2018

    Getting voltage to t-con? Data going out on lvds? Voltages on t-con?

    Leave a comment:


  • jason123
    replied
    Re: Samsung UN32N5300 SmarTV -2018

    Originally posted by dskall View Post
    Is your processor getting warm? Oscillator working, voltage to eeprom? Thinking you should have a 1.2v to run processor.
    processor is getting warm, crystal has some activities (loading of a scope pretty much messes it up), and eeprom has 3.3 V. I don't see 1.2 V on the board, but I do see 0.9 (core?), 1.9, 3.3,...

    Leave a comment:


  • dskall
    replied
    Re: Samsung UN32N5300 SmarTV -2018

    Is your processor getting warm? Oscillator working, voltage to eeprom? Thinking you should have a 1.2v to run processor.
    Last edited by dskall; 12-14-2021, 11:49 AM.

    Leave a comment:


  • jason123
    replied
    Re: Samsung UN32N5300 SmarTV -2018

    Originally posted by dskall View Post
    Well worst case if rest is working is buy an inverter for your backlights.
    No image is displayed on screen , so not just no backlight, unfortunately

    Leave a comment:


  • jason123
    replied
    Re: Samsung UN32N5300 SmarTV -2018

    Originally posted by dick_barton View Post
    Another though is...........have you measured the voltages at the led connector (with leds disconnected) and then power up and see what the voltage peaks to. If ithe peak exceeds the 57V then it's possibly faulty led(s).
    รท LEAD READS 110V NEGATIVE LEAD READS 77 V. So Differential is less than 57 v

    Leave a comment:


  • jason123
    replied
    Re: Samsung UN32N5300 SmarTV -2018

    Originally posted by dick_barton View Post
    Just a quick thought. Can you check the resistance and inductance of T9101C. There have been a few issues with inductors running hot and failing in the led circuits.
    R = 1.8 Ohm
    L= 1.216 mH

    Leave a comment:


  • dick_barton
    replied
    Re: Samsung UN32N5300 SmarTV -2018

    Another though is...........have you measured the voltages at the led connector (with leds disconnected) and then power up and see what the voltage peaks to. If ithe peak exceeds the 57V then it's possibly faulty led(s).

    Leave a comment:


  • dskall
    replied
    Re: Samsung UN32N5300 SmarTV -2018

    Maybe someone smarter than me will jump in. Not sure if there is pfc on this board. Is that one coil for pfc or just filtering?

    Leave a comment:


  • dick_barton
    replied
    Re: Samsung UN32N5300 SmarTV -2018

    Just a quick thought. Can you check the resistance and inductance of T9101C. There have been a few issues with inductors running hot and failing in the led circuits.

    Leave a comment:


  • dskall
    replied
    Re: Samsung UN32N5300 SmarTV -2018

    Well worst case if rest is working is buy an inverter for your backlights.

    Leave a comment:


  • jason123
    replied
    Re: Samsung UN32N5300 SmarTV -2018

    3.3 v, 5 v, 12v, 1.9 v are all present. Led voltage is about 27 V differential (not enough to turn leds on- need 54 v or so)

    Leave a comment:

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