Polaroid TLX-04244B

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  • retiredcaps
    Badcaps Legend
    • Apr 2010
    • 9271

    #21
    Re: Polaroid TLX-04244B

    1) Is there a part number (or list all the numbers) on the inverter transformer?

    2) Take a clear focused picture of the above.
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    • 2011srg
      Member
      • Nov 2011
      • 46

      #22
      Re: Polaroid TLX-04244B

      On the side of them in the pictures they say T51 . 0165 . 211 E5
      0816 70 A S
      Attached Files

      Comment

      • retiredcaps
        Badcaps Legend
        • Apr 2010
        • 9271

        #23
        Re: Polaroid TLX-04244B

        Originally posted by 2011srg
        On the side of them in the pictures they say T51 . 0165 . 211 E5
        1) Over at

        http://www.lcdparts.net/T.aspx

        there are 6 inverter transformers that begin with T51. None of them are an exact match for yours, but if you click on all 6 that begin with T51 (click on the buy now button), they will take you to a picture of the underside.

        2) What you are trying to measure is the resistance between S1 and S2 (the secondaries - see post #7). As you can see, with the T51, the secondaries are on opposite sides of each other. Your job is to find the right one that will give a reading somewhere in the range between 880 Ohms and 2000 Ohms.

        3) Since the resistance might be 2001 Ohms, set your multimeter to the 20K scale otherwise it will display a "1" on the left hand side indicating out of range.

        4) Once you find the correct combination of pins, repeat for all inverter transformers and report the readings. All readings should be within 3% of each other. If not, you have a bad inverter transformer.

        5) Remember to measure resistance with the power off and TV unplugged from the outlet.

        6) PS. Clicking on "buy now" won't put anything in your shopping cart. It just gets you more info.
        Last edited by retiredcaps; 11-26-2011, 11:18 PM.
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        Comment

        • 2011srg
          Member
          • Nov 2011
          • 46

          #24
          Re: Polaroid TLX-04244B

          Ok so here are my new readings on the Master transformer on the right I get 4.88 on both solder points but on the left one (edge of board) i get 4.88 on the right solder point and nothing on the end (edge) and on the slave side I get 7.59 on both solder points on the right one(inside) and of the left one(Edge of board) I get 8.30 on the right one(inside) and nothing on the left(edge)

          Comment

          • retiredcaps
            Badcaps Legend
            • Apr 2010
            • 9271

            #25
            Re: Polaroid TLX-04244B

            Originally posted by 2011srg
            Ok so here are my new readings
            1) Your finding would be easier for us to interpret if you report it like this example

            Master side
            transformer T1. S1-S2 = 777 Ohms
            transformer T2. S1-S2 = 773 Ohms

            Slave side
            transformer T1. S1-S2 = 774 Ohms
            transformer T2. S1-S2 = 773 Ohms

            2) Please perform the test again to verify your findings.

            3) There seems to be a lot of people who are mis-interpreting their manual range multimeter readings.

            A multimeter always gives a reading. "1" on the left hand side of the display means the reading is "out of range".

            1.0 on the right side on the display is a unit of measure (i.e. 1 unit of measure). As you as you turn on the multimeter, it gives you a reading. There is no such thing as "nothing".
            Last edited by retiredcaps; 11-27-2011, 12:29 AM.
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            Comment

            • 2011srg
              Member
              • Nov 2011
              • 46

              #26
              Re: Polaroid TLX-04244B

              Ok so
              Master Side T1. S1-S2 = 4.86 Ohms
              transformer T2. S1-S2 = 4.86 Ohms

              Slave side
              Transformer T1. S1-S2 = 5.17 Ohms
              Transformer T2. S1-S2 = 5.17 Ohms

              Comment

              • retiredcaps
                Badcaps Legend
                • Apr 2010
                • 9271

                #27
                Re: Polaroid TLX-04244B

                Originally posted by 2011srg
                Ok so
                Master Side T1. S1-S2 = 4.86 Ohms
                transformer T2. S1-S2 = 4.86 Ohms

                Slave side
                Transformer T1. S1-S2 = 5.17 Ohms
                Transformer T2. S1-S2 = 5.17 Ohms
                Were the transfomer readings were identical down to the last decimal place?

                Or is it a cut and paste error?
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                Comment

                • 2011srg
                  Member
                  • Nov 2011
                  • 46

                  #28
                  Re: Polaroid TLX-04244B

                  I'm sorry i wrote it down in note pad and must of gave you the wrong numbers

                  Master Side T1. S1-S2 = 4.91 Ohms
                  transformer T2. S1-S2 = 4.92 Ohms

                  Slave side
                  Transformer T1. S1-S2 = 7.67 Ohms
                  Transformer T2. S1-S2 = 7.67 Ohms
                  And these are identical down to the last decimal place

                  Comment

                  • retiredcaps
                    Badcaps Legend
                    • Apr 2010
                    • 9271

                    #29
                    Re: Polaroid TLX-04244B

                    1) Is the slave inverter transformer the exact same part number as the master?

                    2) Let's measure the secondaries one more time, but now put you meter on the 2000 (two thousand) scale. Report these findings.
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                    • 2011srg
                      Member
                      • Nov 2011
                      • 46

                      #30
                      Re: Polaroid TLX-04244B

                      Yes the part numbers are the same.
                      Master
                      Transformer T2. S1-S2 = 37.7 Ohms
                      Slave
                      Transformer T2. S1-S2 = 35.6 Ohms

                      Comment

                      • 2011srg
                        Member
                        • Nov 2011
                        • 46

                        #31
                        Re: Polaroid TLX-04244B

                        So are these reading ok, do you think that the control board could cause this?

                        Comment

                        • tom66
                          EVs Rule
                          • Apr 2011
                          • 32560
                          • UK

                          #32
                          Re: Polaroid TLX-04244B

                          Originally posted by 2011srg
                          So are these reading ok, do you think that the control board could cause this?
                          Here's a test to try. Get a sheet of newspaper or printer paper. Roll it up into a small tube. Place the tube against your ear. Turn the TV on and search for the buzzing sound. It's possible a transformer is arcing over internally and the one making the sound is probably the faulty one. The resistance test isn't perfect; it can miss certain failures.
                          Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                          For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                          Comment

                          • retiredcaps
                            Badcaps Legend
                            • Apr 2010
                            • 9271

                            #33
                            Re: Polaroid TLX-04244B

                            Originally posted by 2011srg
                            So are these reading ok, do you think that the control board could cause this?
                            The master and slave inverter numbers are so far apart, I don't know which, if any, are the correct ones.
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                            Comment

                            • 2011srg
                              Member
                              • Nov 2011
                              • 46

                              #34
                              Re: Polaroid TLX-04244B

                              So i did the paper thing both boards are buzzing but I can't tell if both or just one of them are doing it

                              Comment

                              • 2011srg
                                Member
                                • Nov 2011
                                • 46

                                #35
                                Re: Polaroid TLX-04244B

                                Here are some pics of readings
                                Attached Files

                                Comment

                                • tom66
                                  EVs Rule
                                  • Apr 2011
                                  • 32560
                                  • UK

                                  #36
                                  Re: Polaroid TLX-04244B

                                  Did you test the fuses on the inverter board?
                                  Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                                  For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                                  Comment

                                  • 2011srg
                                    Member
                                    • Nov 2011
                                    • 46

                                    #37
                                    Re: Polaroid TLX-04244B

                                    Is this what your talking about?
                                    Attached Files

                                    Comment

                                    • tom66
                                      EVs Rule
                                      • Apr 2011
                                      • 32560
                                      • UK

                                      #38
                                      Re: Polaroid TLX-04244B

                                      Originally posted by 2011srg
                                      So i did the paper thing both boards are buzzing but I can't tell if both or just one of them are doing it
                                      Did you check the fuse on the boards? It's the white object next to the power connector. First; check the zero level of your meter: Set your meter to the ohms range, then touch both leads together. Note the reading and write it here. Then place one lead on one side and the other lead on the other side of the fuse. Report back the reading.
                                      Last edited by tom66; 11-27-2011, 04:20 PM.
                                      Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                                      For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                                      Comment

                                      • 2011srg
                                        Member
                                        • Nov 2011
                                        • 46

                                        #39
                                        Re: Polaroid TLX-04244B

                                        They come back as 0.00 Ohms

                                        Comment

                                        • 2011srg
                                          Member
                                          • Nov 2011
                                          • 46

                                          #40
                                          Re: Polaroid TLX-04244B

                                          Is there any chance that the power supply isn't giving enough power to the inverters, if so how can I check. I also contacted a ebay seller that is selling the inverters and asked if he could tell me the ohms of the transformers

                                          Comment

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