Samsung UN55H6203AFXZA scorched part on PS board.

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • ztu165
    Senior Member
    • Jan 2013
    • 87
    • USA
    #1

    Samsung UN55H6203AFXZA scorched part on PS board.

    Hi guys, I picked up this tv today and the owner said the tv had sound but no picture. Upon getting home I immediately proceeded to open up the back without plugging the tv in to see what it does and I found the PS has a pretty big part that is scorched and underneath (bottom of PS) is what I wanna say is a voltage regulator? Don't really know... but anyway what do you guys think happened to it and can I take another one of those from another PS and pop it in or do I buy a replacement from digikey?
    Attached Files
    Tags: None
    • ztu165
      Senior Member
      • Jan 2013
      • 87
      • USA
      #2
      Re: Samsung UN55H6203AFXZA scorched part on PS board.

      Also wanna mention that the PS has a bunch of questionable/ suspect solder joints...

        Comment

        • budm
          Badcaps Legend
          • Feb 2010
          • 40746
          • USA
          #3
          Re: Samsung UN55H6203AFXZA scorched part on PS board.

          That is PWM Controlled power MOSFET and the LED backlights return line for the LED string. You may have some shorted out LEDs so the MOSFET runs hot.
          Do you have LED tester?
          Never stop learning
          Basic LCD TV and Monitor troubleshooting guides.
          http://www.badcaps.net/forum/showthr...956#post305956

          Voltage Regulator (LDO) testing:
          http://www.badcaps.net/forum/showthr...999#post300999

          Inverter testing using old CFL:
          http://www.badcaps.net/forum/showthr...er+testing+cfl

          Tear down pictures : Hit the ">" Show Albums and stories" on the left side
          http://s807.photobucket.com/user/budm/library/

          TV Factory reset codes listing:
          http://www.badcaps.net/forum/showthread.php?t=24809

            Comment

            • ztu165
              Senior Member
              • Jan 2013
              • 87
              • USA
              #4
              Re: Samsung UN55H6203AFXZA scorched part on PS board.

              Hey budm thanks for your reply, as far as an LED tester unfortunately I don't have one. Is my next step taking the TV apart and get to the LED's?

                Comment

                • budm
                  Badcaps Legend
                  • Feb 2010
                  • 40746
                  • USA
                  #5
                  Re: Samsung UN55H6203AFXZA scorched part on PS board.

                  Taking apart the 55" panel is the last thing you will want to do.
                  It is better in invest on a LED tester to at least test the LED string to see what result you will see.
                  Can you still read the P/N as printed on that MOSFET?
                  Never stop learning
                  Basic LCD TV and Monitor troubleshooting guides.
                  http://www.badcaps.net/forum/showthr...956#post305956

                  Voltage Regulator (LDO) testing:
                  http://www.badcaps.net/forum/showthr...999#post300999

                  Inverter testing using old CFL:
                  http://www.badcaps.net/forum/showthr...er+testing+cfl

                  Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                  http://s807.photobucket.com/user/budm/library/

                  TV Factory reset codes listing:
                  http://www.badcaps.net/forum/showthread.php?t=24809

                    Comment

                    • ztu165
                      Senior Member
                      • Jan 2013
                      • 87
                      • USA
                      #6
                      Re: Samsung UN55H6203AFXZA scorched part on PS board.

                      I ordered this LED tester... should be here tomorrow, what do you think? https://www.amazon.com/SID-LED-Multi...&rps=1&sr=8-12

                        Comment

                        • ztu165
                          Senior Member
                          • Jan 2013
                          • 87
                          • USA
                          #7
                          Re: Samsung UN55H6203AFXZA scorched part on PS board.

                          Also mosfet reads D5N40 GA4H18...

                            Comment

                            • budm
                              Badcaps Legend
                              • Feb 2010
                              • 40746
                              • USA
                              #8
                              Re: Samsung UN55H6203AFXZA scorched part on PS board.

                              https://www.mouser.com/Search/Refine?Keyword=D5N40
                              You may have to get it from EBAY since it is obsoleted part.
                              Never stop learning
                              Basic LCD TV and Monitor troubleshooting guides.
                              http://www.badcaps.net/forum/showthr...956#post305956

                              Voltage Regulator (LDO) testing:
                              http://www.badcaps.net/forum/showthr...999#post300999

                              Inverter testing using old CFL:
                              http://www.badcaps.net/forum/showthr...er+testing+cfl

                              Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                              http://s807.photobucket.com/user/budm/library/

                              TV Factory reset codes listing:
                              http://www.badcaps.net/forum/showthread.php?t=24809

                                Comment

                                • ztu165
                                  Senior Member
                                  • Jan 2013
                                  • 87
                                  • USA
                                  #9
                                  Re: Samsung UN55H6203AFXZA scorched part on PS board.

                                  Hey Budm... So I finally got the LED tester and I gave it a shot! Turns out the very top strip was shorted and on my weak ass attempt on getting down to the LED strips so that I could get a part number and order them I accidently cracked the damn panel on one of the bottom corners! I felt so damn bad... still do. Dammit!

                                    Comment

                                    • ztu165
                                      Senior Member
                                      • Jan 2013
                                      • 87
                                      • USA
                                      #10
                                      Re: Samsung UN55H6203AFXZA scorched part on PS board.

                                      Here's a picture so you can see my stupidity!
                                      Attached Files

                                        Comment

                                        Previous template Next

                                        Related Topics

                                        Collapse
                                        • m1ch43lzm
                                          HP Pavilion 15-eh Board DAG7HAMB8F0 - CPU throttling to 0.4GHz (PROCHOT_EXT) and black screen
                                          by m1ch43lzm
                                          Hi, this is my personal laptop, which the original board (lets call it Board A) blew up PU8700 (TPS51486), making a hole on the board, i had left the laptop at my desk one day with the battery fully charged and didn't touch it for a week, but when i tried to turn it on it didn't
                                          Thought the battery was dead, so i plugged in the charger then tried to power on, the power LED blinked once, charged LED still orange, unplugged the charger, plugged in again and I noticed the "magic smoke" smell, so i unplugged the charger, removed the back cover and saw the blown IC (the "magic...
                                          05-12-2025, 08:37 PM
                                        • ohren
                                          Upgrading a Samsung ue55nu7096u with logic board from an ue55ru7105k -- good idea?
                                          by ohren
                                          I hope this is the right forum to post in despite not technically being a repair, but still a question of swapping boards.

                                          I thought I'd explore the possibility to upgrade an existing working Samsung ue55nu7096u with the logic board (and power board if needed) of a newer model (ue55ru7105k) of the same size and appearance (and resolution). The reason being I'd like the extra inputs of that board including component in, an extra HDMI port and bluetooth. Its panel is broken so I have no use for the board otherwise.

                                          The models launched in 2018 and 2019 respectively....
                                          09-08-2023, 05:24 PM
                                        • C152Heavy
                                          Samsung LN46C630K1F – Intermittent Backlight, BN44-00341B Power Board
                                          by C152Heavy
                                          Samsung LN46C630K1F – Intermittent Backlight, BN44-00341B Power Board

                                          Summary for TL-DR readers:
                                          • Backlight is intermittent, may come on with TV boot or not. No flickering, never fails during TV on.
                                          • Have obtained Samsung schematic & service documents - Can upload if helpful.
                                          • Have read ALL applicable threads
                                          • C1818 and CP820 replaced as low hanging fruit
                                          • CN802 data taken for normal and failed BL operation. SUMMARY: Pin 2 - 5vDet = 3.52 @normal, 0.0 @BL fail. Pin 6 - EPWM = 1.631 @normal, 1.058 @BL fail.
                                          • VCC pin (18) of PFC...
                                          01-11-2023, 02:53 PM
                                        • Nicktronic
                                          Samsung Power Supply Board BN44-00874F
                                          by Nicktronic
                                          Hey everyone,

                                          This power supply board is hard to find but there are repair kits available. This board had a blown fuse, FP801S, blown PFC MOSFET, QP802CS and ceramic cap, CP809. I replaced them with parts I already had and tested the rest of the parts that would've come in the repair kit and they were fine. I powered the board up on the bench expecting, in typical Samsung power supply board fashion, to see all my output voltages but, nothing. 0 volts on CNL801, CNM801 and CNT801. The only thing I have is 170vdc on the filter caps. No standby voltage either.

                                          Anybody...
                                          03-17-2025, 06:20 AM
                                        • valvashon
                                          Samsung UN65KU6290F PS board blows fuses
                                          by valvashon
                                          Samsung UN65KU6290F (May 2017); received from local Buy Nothing group. Was listed as "just went dead" and they wanted it gone. I brought it home, didn't notice anything visually wrong with the power supply board, looked up the cost of a new one and that's about as far as it went. Family was tired of tripping on the foot of the set so I decided to dig in and repair or toss.

                                          Can't believe that I didn't check it earlier but I found the main 8 amp fuse blown. Jumped across it with a 10 amp blade style fuse and you can see that it literally exploded inside the second I plugged...
                                          4 Photos
                                          11-27-2023, 01:09 PM
                                        • Loading...
                                        • No more items.
                                        Working...