Announcement

Collapse
No announcement yet.

Rca RLED4010A power supply

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    Rca RLED4010A power supply

    Hello!My mom just gave me her Del TV because it had an intermittent no power issue.

    So i'm looking to fix this unit since i got it for free.The problem is that i search the net for hours looking for a replacement power supply and there is only the rev1.1 version.On my board is written: MEGMEET MP118T REV1.2 2011.06.02

    Is it ok if i used a rev 1.1?

    Thanks!

    #2
    Re: Rca RLED4010A power supply

    Not want to repair the board?

    Comment


      #3
      Re: Rca RLED4010A power supply

      I wish i could repair the board but my mom's friend tried
      to replace the transformator(the black square thing between hot and cold).Now the tv is dead,even the standby light dosen't light anymore.And i'm à beguinner
      So i dunno how to troubleshoot a board.

      Comment


        #4
        Re: Rca RLED4010A power supply

        We can help, Start by getting good clear pictures of the PSU, top and bottom.. get a good one of the area that has been worked on before.

        Have a Multimeter?

        Comment


          #5
          Re: Rca RLED4010A power supply

          Thanks for your help,i appreciate it!I will take clear picture tonite when i get home.I do have
          Basic tools,like multimeter,electronic solder gun.

          Comment


            #6
            Re: Rca RLED4010A power supply

            I took a few shot of the board,thanks for your help!
            Attached Files

            Comment


              #7
              Re: Rca RLED4010A power supply

              Update!

              I took a closer look at the weldings(picture 6 top right)and there was a little overlaping of lead so i scraped it off with a small screwdriver.When i put the power back on the red stand by light was on

              When i put the tv on the light turns blue,but nothing happens.There is a high pitch sound comming from the black transfo...at least the Tv is not dead anymore!! So if this part is not in cause maybe with the help of you guys we can save this board!

              It seem back to the state it was before that repair was tried.The set would not come on sometimes,and the only way to turn the tv off is to unplug it.After several attempts,the Tv would turn on and work fine.
              Last edited by whitesnake; 12-11-2013, 10:26 PM.

              Comment


                #8
                Re: Rca RLED4010A power supply

                OK, can you get me a close up of the connector that goes from the PSU to the Main board (one with the HDMI etc on) so i can see any references for voltages.

                ta

                Comment


                  #9
                  Re: Rca RLED4010A power supply

                  Here it is
                  Attached Files
                  Last edited by whitesnake; 12-12-2013, 10:46 PM.

                  Comment


                    #10
                    Re: Rca RLED4010A power supply

                    any help with this would be appreciated!!

                    Comment


                      #11
                      Re: Rca RLED4010A power supply

                      i'm still triing to figure this out so i could have a chance to fix this set for the holidays..any toughts?

                      Comment


                        #12
                        Re: Rca RLED4010A power supply

                        i went to the local electronics any the clerk took a look at my psu and said it look fine and probably it is the inverter board that need to be changed.How do i check this board?

                        Comment


                          #13
                          Re: Rca RLED4010A power supply

                          how did he come up with that? the connector that goes from the power board to the main board what are the pins labeled? gnd gnd 5vstb etc. list them in order or take a close up of those labels

                          Comment


                            #14
                            Re: Rca RLED4010A power supply

                            can you take a clear pic of the area of the transformer that is making the noise so we can see the components around it? i am gonna guess it isn't the transformer but a diode close to it...just a guess for now

                            Comment


                              #15
                              Re: Rca RLED4010A power supply

                              if t2 is the transformer that was worked on check d8 and d17 and see what the reading are...1 of them might be what is making the sound

                              Comment


                                #16
                                Re: Rca RLED4010A power supply

                                hello and thanks for your help!The transformer was indeed the T2,so i check the D8 and D17 and the reading was Infinite on one direction and about 600 in the other so i guess they are fine.For the picture,i'm sorry for the poor quality.I will borrow a good quality camera and send some pics asap.

                                Comment


                                  #17
                                  Re: Rca RLED4010A power supply

                                  Can I see the whole back side of the TV to see how the BACKLIGHTS LED strings are connected to that power supply board?
                                  That black transformer is for the LED backlights power supply. There should some kiond of printing on the board to indicate the output voltages of the power supply.
                                  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


                                    #18
                                    Re: Rca RLED4010A power supply

                                    I took a few clearer shot of the values asked.If you need any precisions,just ask me i will take more shots
                                    Attached Files

                                    Comment


                                      #19
                                      Re: Rca RLED4010A power supply

                                      up

                                      Comment


                                        #20
                                        Re: Rca RLED4010A power supply

                                        OK, there is LED backlights driver board just above the power supply board and it gets the 24vdc from the power supply board.
                                        Those 3 output connectors of the power supply boards have labels on them, such as 12v, stby.
                                        Make the list of all the label on those connectors.
                                        Then take the DC voltage readings, black probe on the chassis.
                                        Report the readings when TV is plugged in (do not activate the power switch).
                                        Then hit the power switch and take the reading and report the readings.
                                        They are important information for us to know.
                                        Do not touch anything on the board with your hand, you should also plug the TV into GFI outlet to protect yourself.
                                        Last edited by budm; 12-23-2013, 05:38 PM.
                                        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

                                        Working...
                                        X