Polaroid FLM-2601 no power

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  • tibimakai
    Badcaps Legend
    • Jan 2012
    • 3680
    • USA

    #1

    Polaroid FLM-2601 no power

    Here is another one with different issue.
    It seems dead, no standby voltage, PFC it's way to low at 3.46V.
    Replaced all the capacitors(except the one which has heatshrink on it), two of the 1000uF were bulging.
    There are no voltages at the output connector.
    I know that the two 1000uF look weird, but I couldn't find 22MM high capacitors at Digikey.
    The soldering it seems that it was done by a beginner. The worst that I have seen yet.
    Any help would be appreciated.
    I will start following/studying the PS diagram in the other post also.
    Attached Files
  • tom66
    EVs Rule
    • Apr 2011
    • 32560
    • UK

    #2
    Re: Polaroid FLM-2601 no power

    You get 3.5V across the big cap? Is fuse okay?
    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

    • tibimakai
      Badcaps Legend
      • Jan 2012
      • 3680
      • USA

      #3
      Re: Polaroid FLM-2601 no power

      The main fuse it's OK. Yes, that is what I'm getting.

      Comment

      • budm
        Badcaps Legend
        • Feb 2010
        • 40746
        • USA

        #4
        Re: Polaroid FLM-2601 no power

        You may want to look at this post, it has sch for the board.
        https://www.badcaps.net/forum/showthread.php?t=21046
        Last edited by budm; 06-29-2012, 08:58 AM.
        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

        • tibimakai
          Badcaps Legend
          • Jan 2012
          • 3680
          • USA

          #5
          Re: Polaroid FLM-2601 no power

          Thanks budm, to that I was reffering in my last sentence.
          I would like your opinion on that Samsung 46A530 HDMI issue that I have.

          Comment

          • retiredcaps
            Badcaps Legend
            • Apr 2010
            • 9271

            #6
            Re: Polaroid FLM-2601 no power

            See if the bridge rectifier (D904) is shorted between pins 1-2, 1-3, 1-4, 2-3, 2-4 and 3-4. If it is not shorted, what is the DC voltage on the two outside pins (1 and 4)?
            --- begin sig file ---

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            Comment

            • budm
              Badcaps Legend
              • Feb 2010
              • 40746
              • USA

              #7
              Re: Polaroid FLM-2601 no power

              As you can see, there is the Thermistor R926 (for inrush current protection plus two inductor and a Diode) that is feeding the DC main filter cap as shown in the circuits. Make sure they are not open circuits.
              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

              • tibimakai
                Badcaps Legend
                • Jan 2012
                • 3680
                • USA

                #8
                Re: Polaroid FLM-2601 no power

                The rectifier it's good. I hadn't had time to check anything else, hopefully later on today.

                Comment

                • retiredcaps
                  Badcaps Legend
                  • Apr 2010
                  • 9271

                  #9
                  Re: Polaroid FLM-2601 no power

                  Originally posted by tibimakai
                  The rectifier it's good.
                  What is the DC voltage on the rectifier?
                  --- begin sig file ---

                  If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.

                  We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.

                  Please do not post inline and offsite as they slow down the loading of pages.

                  --- end sig file ---

                  Comment

                  • tibimakai
                    Badcaps Legend
                    • Jan 2012
                    • 3680
                    • USA

                    #10
                    Re: Polaroid FLM-2601 no power

                    I will check in a few minutes.

                    Comment

                    • ben7
                      Capaholic
                      • Jan 2011
                      • 4059
                      • USA

                      #11
                      Re: Polaroid FLM-2601 no power

                      With the power supply unplugged, measure the resistance of this component, it should be low resistance, like 25 ohms or less.
                      Muh-soggy-knee

                      Comment

                      • tibimakai
                        Badcaps Legend
                        • Jan 2012
                        • 3680
                        • USA

                        #12
                        Re: Polaroid FLM-2601 no power

                        Repairing live.
                        I have just found the problem! It was T902, one of the pins wasn't soldered.
                        It was pretty black that pin.
                        So capacitors replaced(2x1000uf bulging, replaced almost all) and resoldered T902's pin.
                        Another one fixed. 20 TVs and two monitors since February.
                        Now I need help with the ASUS MK241H , I can't find anything for this monitor.

                        Comment

                        • tibimakai
                          Badcaps Legend
                          • Jan 2012
                          • 3680
                          • USA

                          #13
                          Re: Polaroid FLM-2601 no power

                          Here is the picture with the bad solder joint:
                          Attached Files

                          Comment

                          • tom66
                            EVs Rule
                            • Apr 2011
                            • 32560
                            • UK

                            #14
                            Re: Polaroid FLM-2601 no power

                            Nice fix! Thanks for posting back.

                            I wonder who makes this particular Polaroid chassis?
                            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

                            • awyatt2
                              Badcaps Veteran
                              • Feb 2012
                              • 407
                              • america

                              #15
                              Re: Polaroid FLM-2601 no power

                              insignia makes the 3201 if it follows suit as mine then you have an is-lctv26. compare the ser manuals and see if it is the same.

                              Comment

                              • ben7
                                Capaholic
                                • Jan 2011
                                • 4059
                                • USA

                                #16
                                Re: Polaroid FLM-2601 no power

                                Interesting that the solder joint on the EMI filter inductor.
                                Muh-soggy-knee

                                Comment

                                • budm
                                  Badcaps Legend
                                  • Feb 2010
                                  • 40746
                                  • USA

                                  #17
                                  Re: Polaroid FLM-2601 no power

                                  That is not uncommon failure at all. Poor soldering works.
                                  When you see big components, Power semiconductor, power resistor mounted on the PCB, you will always inspect and resolder the leads. You will see small ring (crack, but not completely broken) around the joints.
                                  Attached Files
                                  Last edited by budm; 07-04-2012, 01:10 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

                                  • tom66
                                    EVs Rule
                                    • Apr 2011
                                    • 32560
                                    • UK

                                    #18
                                    Re: Polaroid FLM-2601 no power

                                    Originally posted by awyatt2
                                    insignia makes the 3201 if it follows suit as mine then you have an is-lctv26. compare the ser manuals and see if it is the same.
                                    But Insignia is just Best Buy, I expect they use the cheapest Chinese OEM on the day...
                                    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

                                    • budm
                                      Badcaps Legend
                                      • Feb 2010
                                      • 40746
                                      • USA

                                      #19
                                      Re: Polaroid FLM-2601 no power

                                      Insignia/Dynex are just Best Buy House brand. A lot of Insignia are made by the same people that make Polaroid TV, they even use the same model numbers on the tags! If you go to shopjimmy and look up boards for Insignia/Dynex/ Polaroid, you will see they are using the just about the same board assemblies.
                                      Last edited by budm; 07-04-2012, 01:30 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

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