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Samsung 37 LE37A558P3F wrong colors

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    Samsung 37 LE37A558P3F wrong colors

    Hi There!
    A users is posting an ad for a Samsung 37 LE37A558P3F that needs to be repair. Its pretty cheap. He describes the problem as:
    "Wrong colors, all is blue and yellow". Supposedly it's all happening on the whole screen.
    This is the only screenshot he has (see attached).
    Would you expect this to be a LCD panel issue? Or a board issue?

    Thanks in advance!
    Attached Files

    #2
    Re: Samsung 37 LE37A558P3F wrong colors

    I'd suspect its the gamma ic on the tcon that is the problem. Usually an AS15 sometimes an AS19.
    Either replace the tcon, get it repaired by someone or do it yourself if you have the tools/skill. The ic costs about 50p.

    Comment


      #3
      Re: Samsung 37 LE37A558P3F wrong colors

      Good to know!!! My main concern is getting a TV that has a broken panel...
      This company offers repairing those T-Con boards:
      http://tvrestore.es/es/home/154-serv...37t04-c02.html
      What IC in particular is the one to be replaced? Is it hard? Im good with all sort of normal DIP IC's or 4-6-8 pins SMD but anything beyond that....I would prefer a new board

      Thanks!!

      Comment


        #4
        Re: Samsung 37 LE37A558P3F wrong colors

        Its the one under the heatsink top left in your link. It's 48 pin.
        Here's a pic without the heatsink https://www.ebay.co.uk/itm/2x-AS15G-...t/161948334566
        It's easy with hot air, and I have done one with an iron and chipquik although if it uses the ground pad underneath an iron won't remove it.

        Comment


          #5
          Re: Samsung 37 LE37A558P3F wrong colors

          Oh no no no!!! Ive seen the IC and Ive also found a video of the As15F replacement procedure. That IC is not for me LOL
          If you are 99% the issue is not in the LCD panel, I will probably purchase the set and see if it confirms the failure in the TCon board and in such a case I will get a replacement board on ebay (already found some pretty cheap)
          Thanks!!

          Comment


            #6
            Re: Samsung 37 LE37A558P3F wrong colors

            I'd purchase the TV going on that picture. Panel failure usually shows itself as lines on the screen.
            There are test points on the tcon that you can measure to confirm it is the gamma ic.

            Comment


              #7
              Re: Samsung 37 LE37A558P3F wrong colors

              Ok, then I will go ahead and purchase it, and then will get back here. Will try to find info online for those test points, in case I can't, I will get back to you
              Thanks Diif!

              Comment


                #8
                Re: Samsung 37 LE37A558P3F wrong colors

                You're welcome. If you look at this link, they are the top right corner under the connector. https://www.tvparts.co.uk/t370hw02-3...auo-tcon-board

                Comment


                  #9
                  Re: Samsung 37 LE37A558P3F wrong colors

                  Thanks. If I google T370HW02 I get lots of links to those replacement boards BUT they don't all have the same board layout. Should I assume they are different hardware versions but they all will fit?
                  Sample 1: https://es.aliexpress.com/item/LOGIC...829307394.html
                  Sample 2: https://es.aliexpress.com/item/T370H...827060030.html

                  And lots other that are named under the same model number but show different layouts...

                  Thanks

                  Comment


                    #10
                    Re: Samsung 37 LE37A558P3F wrong colors

                    The only way to be sure is look at yours.

                    Comment


                      #11
                      Re: Samsung 37 LE37A558P3F wrong colors

                      So the layout (not only part number) of the one being offered has to match the one in my TV set?

                      Comment


                        #12
                        Re: Samsung 37 LE37A558P3F wrong colors

                        Actually the AS15F replacement is quite simple,What I do is use a sharp Stanley blade,cut the pins off at the chip,then the i.c falls out.then use some solder wick to remove the remaining pins on the pcb.lightly tin the pads afterwards,and plonk on your new chip..my record from start to finish is 3 minutes!

                        Comment


                          #13
                          Re: Samsung 37 LE37A558P3F wrong colors

                          If I had better hands and lots more of time I would try it LOL. I just picked the TV but haven't had time to put it all apart yet.
                          I think as soon as I see the board I will check the P/N and order a replacement

                          Comment


                            #14
                            Re: Samsung 37 LE37A558P3F wrong colors

                            Ok some updates here.
                            I didn't find time to bring this TV home til today. I disassembled it. Found the T-Con board.
                            Labeled: t370hw02
                            The chepaest exact (by model number) replacement part I've found online was:
                            https://es.aliexpress.com/item/T370H...830313386.html

                            But the ad states "for LA37A550P1R" and this TV is a LE37A558p3F instead. Does the TV model care? Or it's only the board what has to be identical?
                            I've carefully checked the pictures in the ad and it is absolutelly the same board.
                            Should I get it?
                            Thanks

                            Comment


                              #15
                              Re: Samsung 37 LE37A558P3F wrong colors

                              Can we actually see the good clear pictures of your T-CON?
                              There are at least two P/N on the board:
                              One for the PCB ( Blank circuit board without parts installed)
                              One for the PCBA (PCB assembly) which the Blank board is stuffed to make PCBA for particular LCD panel, blank board can be stuffed in may ways to make many PCBA.
                              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


                                #16
                                Re: Samsung 37 LE37A558P3F wrong colors

                                Absolutely, check attachment. So I guess PCBA is the one on the sticker?
                                Thanks for your help!
                                Attached Files

                                Comment


                                  #17
                                  Re: Samsung 37 LE37A558P3F wrong colors

                                  I am not sure you can see shopjimmy web site or not.
                                  http://www.shopjimmy.com/auo-55-37t0...-con-board.htm
                                  AUO 55.37T04.C01 (T370HW02 V402, 37T04-C02) T-Con Board
                                  Panel Sticker Number: T370HW02 V.4, T370XW02 V.E
                                  http://www.shopjimmy.com/auo-55-37t0...-con-board.htm
                                  Attached Files
                                  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: Samsung 37 LE37A558P3F wrong colors

                                    I know their website as Ive watched lots of their TV service videos. They dont have any of those boards right now (and their price for them doubles those I had found before) and I cant use their repair service as I live in Spain and the shipping would be way too much.
                                    But my question is, should I only pay attention, when purchasing a replacement, to the board PN and its physical layout (picture with component position) , despite the TV model they claim it works for? Or the TV model should match too? Some dont even state the TV it fits...
                                    Thanks in advance
                                    Eduardo
                                    Last edited by edugimeno; 04-21-2018, 12:28 AM.

                                    Comment


                                      #19
                                      Re: Samsung 37 LE37A558P3F wrong colors

                                      The two boards may look the same, I.E. R1 may show on both board but R1 in one board may be 100 Ohms, another board may be 200 Ohms.
                                      They make bunches of PCBA numbers for reason.
                                      You can buy it and try to see it is compatible with your LCD panel or not, you now know what the P/N is for your your board, so it is up to you.
                                      If it works, great, if not, return it and get the one that matches your P/N.
                                      Last edited by budm; 04-21-2018, 04:31 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


                                        #20
                                        Re: Samsung 37 LE37A558P3F wrong colors

                                        So definitely the PCBA is what has to match to make sure it works on my TV?

                                        Comment

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