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Philips 42PFL5432D/37

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    Re: Philips 42PFL5432D/37

    What I did on one of the TV I fixed is to leave the T-CON metal cover off, then I use a small CPU cooling fan to blow cool air on to the T-CON board using the switched 12VDC for powering up the fan, another TV I used heatsink to cool the IC.
    http://s807.photobucket.com/albums/y...%20LTV-32W3HD/

    Do you have a can of compressed air duster? They sell them at Costco 3 cans for about $6, just turn the can upside down and blow the cold air on the T-CON to see if it will start working again, then you can try just cool each IC or components on the T-CON board to find out which one is temperatue sensitive.
    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


      Re: Philips 42PFL5432D/37

      That is a cap, C69 , in the picture that looks bad. You should be able to take a voltage reading on the cap, the bar is the Postive side in this case. You can try cool spray on this cap.
      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


        Re: Philips 42PFL5432D/37

        By the way, your camera should have MACRO mode for closed up function.
        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


          Re: Philips 42PFL5432D/37

          Careful, some canned air contains liquid propellant and when the can is turned upside down, it comes out instead of air (I found out the hard way spraying "air" at my digital camera sensor) I suggest if you are going to try this, use a can of freezer spray instead.

          Originally posted by budm View Post
          Do you have a can of compressed air duster? They sell them at Costco 3 cans for about $6, just turn the can upside down and blow the cold air on the T-CON to see if it will start working again, then you can try just cool each IC or components on the T-CON board to find out which one is temperatue sensitive.

          Comment


            Re: Philips 42PFL5432D/37

            The one from Costco works just fine. I used to buy the expensive freeze spray made for electronics repair. You can try Radio Shack, they used to sell these freeze spray for electronics troubleshooting. You can verify if the canned air is OK or not by just spraying it on to a glass and see if it leaves any residue.
            Last edited by budm; 03-02-2012, 10:39 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


              Re: Philips 42PFL5432D/37

              Originally posted by budm View Post
              That is a cap, C69 , in the picture that looks bad. You should be able to take a voltage reading on the cap, the bar is the Postive side in this case. You can try cool spray on this cap.
              So looking at the pic named "top angle" would you say that the left side is positive?

              Comment


                Re: Philips 42PFL5432D/37

                Uh, I went to check the voltage with my multimeter and the solder holding the component was so hot that it fell right off the board...

                The funny thing is after that fell off, my picture came back. The TV works now. I'm baffled, what do I do now? Just leave it and worry about it being a fire hazard? Or what? haha

                Comment


                  Re: Philips 42PFL5432D/37

                  So right now the cap is no longer in place? I had a feeling that the cap has high leakage or shorting out, I will not run the TV without it since the circuits may be exposing AC ripple voltage due to missing filter cap, unless there is another cap with the same value hooked up in parallel with this cap.
                  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


                    Re: Philips 42PFL5432D/37

                    Yeah, the cap is no longer there. So what do I replace it with? My cheap multimeter was reading about 15-16 V.

                    Comment


                      Re: Philips 42PFL5432D/37

                      15~22uf25v surface mounted or try using low ESR through hole type. But one thing that bother me is that the voltage is that high, I do not expect it to be higher than 12vdc. I would look for replacement T-CON because I think it will go out completely soon.
                      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


                        Re: Philips 42PFL5432D/37

                        Yeah, I was thinking of just replacing it because they are relatively cheap. I found one for 20 dollars.

                        But anyway, I wonder if PoteauPet has taken another look at her T-conn board? Curious to see if she has the same prob.

                        Comment


                          Re: Philips 42PFL5432D/37

                          On the surface mounted polarized cap, the BAR is positive, you can verify that with the DMM.
                          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


                            Re: Philips 42PFL5432D/37

                            I have hit a wall. I was following this post here, just to quickly sum up my symptons for you......

                            I was following along nicely, things were good, then i got to the step where it was asked to measure the pins on the voltage regulators on the t-con board. I measured the first one, which would be the one of the top of the pic.



                            Post #170


                            Pin 1- 2.48
                            Pin 2- 0
                            Pin 3- 3.25

                            Exactly what the OP got, and was said it was accurate. cool .

                            Was going to check the second one( the right side of the pic), went i put the red tip of my meter on PIN 2 it caused a little "zap" and very high frequency sound and THE PICTURE CAME ON!! I fiddled with it a couple times and the picture would go on and off as i was poking it. with the zap and high frequency sound.

                            I sat back and it stayed on. So, i think i found the problem, although i dont know what i found!!

                            Could this be a bad voltage regulator? Is it just a bad soldering joint? I have never messed with it, so can joints just go bad over time and need to be fixed?

                            For clairification, while i am measuring the second voltage regulator, i have sound, green power light, back lights on, no picture.

                            Pin 1- 0
                            Pin 2- 5.38
                            Pin 3- 0

                            Thank you for reading this and I hope it makes sense.

                            I was able to measure the second voltage regulator while the picture was on and it was different.

                            Pin 1- 2.5
                            Pin 2- 3.5
                            Pin 3- 0

                            Please help me understand what's going on.

                            Comment


                              Re: Philips 42PFL5432D/37

                              How about the pictures of your board, so we may see what is going on with YOUR board?
                              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


                                Re: Philips 42PFL5432D/37

                                Originally posted by Abbeyjack View Post
                                For clairification, while i am measuring the second voltage regulator, i have sound, green power light, back lights on, no picture.

                                Pin 1- 0
                                Pin 2- 5.38
                                Pin 3- 0
                                A part number and picture for the above would help.
                                --- 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.

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                                Comment


                                  Re: Philips 42PFL5432D/37

                                  I circled the voltage regulator in question in red in the one photo.

                                  Part # 63A3 71Q5Z


                                  Thanks
                                  Attached Files
                                  Last edited by Abbeyjack; 01-16-2013, 05:32 PM.

                                  Comment


                                    Re: Philips 42PFL5432D/37

                                    Going by its position I'd say that's a MOSFET not a voltage regulator.
                                    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


                                      Re: Philips 42PFL5432D/37

                                      according to post #170 its a voltage regulator. Of course I am only going by what I read on here, I really dont know what either one are! Im learning as I go!

                                      Comment


                                        Re: Philips 42PFL5432D/37

                                        That looks like MOSFET to me too, it is QP17 and its GATE pin driven by UP2 pin 4, it is part of the switching power supply. Can you read the P/N on UP2?
                                        You can see V5.6V input feeding the pin of the inductor LP4, the other pin is connected to the Drain (Middle/tab) pin of the MOSFET, the output Diode Anode (DP21) is also connected to the Drain pin, the Cathode pin is the output pin, so it looks like a Boost regulator.
                                        Last edited by budm; 01-16-2013, 07:47 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


                                          Re: Philips 42PFL5432D/37

                                          Originally posted by Abbeyjack View Post
                                          Part # 63A3 71Q5Z
                                          As tom66 and budm both mentioned now, it is a mosfet.

                                          http://www.datasheetarchive.com/63A3-datasheet.html

                                          When I don't get clear focused pictures, I can only guess at what the part can be.

                                          Many people don't realize how difficult remote troubleshooting is when we don't have the board in front of us. You are the eyes, ears, etc for us.
                                          --- 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

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