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    Philips 42PFL5522D/05 Not Powering

    Hey.. first post but hopefully lots more!!

    I have a philips TV i got in..

    Initially it was blowing the internal fuse so I took the board out and on the back was what looked like little burn marks on some of the traces, i cleaned them with isoprop and then put it back together.

    Now its not blowing the fuse but still not powering..

    Done a bit of research on here and decided to check the bridge rectifier..

    First I took readings with it in the board..

    1-2=532
    1-3=517
    1-4=0

    2-1=517
    2-3=1313
    2-4=517

    3-1=531
    3-2=1354
    3-4=528

    4-1=0

    Then removed it and took readings again..

    1-2=504
    1-3=489
    1-4=1142

    2-1=1
    2-3=1
    2-4=489

    3-1=1
    3-2=1
    3-4=498

    4-1=1
    4-2=1
    4-3=1

    Then I tested 1-4 on the board itself with the BR removed..

    1-4=0

    Where too next or any idea of what the prob is..

    Thanks in advance,
    Liam
    Attached Files

    #2
    Re: Philips 42PFL5522D/05 Not Powering

    Looks like you have a short on the output side (DC+/DC-) you should check the other MOSFETs/diodes on the power supply heatsinks for shorts. You only need to check across Drain and Source for a short on a FET.
    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


      #3
      Re: Philips 42PFL5522D/05 Not Powering

      Will do..
      What should they be reading.?

      The one on the same heatsink is reading 003
      One on the heatsink bottom left of that heatsink is reading 1

      Going to have to get longer probes to read the others..

      Comment


        #4
        Re: Philips 42PFL5522D/05 Not Powering

        They should all read open circuit - probably a single "1" on your meter. A result near to zero is suspicious - remove the device to confirm.

        BTW, you should not use BS1363 ("Bussman") fuse for power supply. It is designed to protect cabling and plug not power supply. You should consider using a light bulb tester. It will save you from blowing more fuses.
        https://www.badcaps.net/forum/showthread.php?t=32748
        Last edited by tom66; 02-18-2015, 07:28 AM.
        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


          #5
          Re: Philips 42PFL5522D/05 Not Powering

          Ok cool, saw that lastnight, must get one built!!

          Think i was testing it the wrong way with the last readings..

          Three Pins on MOSFET are from Left -- G.D.S

          With that..

          One on same heatsink is reading 000 when testing S with positive and D with neg..

          Other MOSFET on Heatsink bottom left is reading 425

          Will i go ahead with removal of one reading 0.?
          Last edited by liamoc74; 02-18-2015, 07:39 AM.

          Comment


            #6
            Re: Philips 42PFL5522D/05 Not Powering

            Okay with the MOSFET out its reading 0 between drain and supply..

            This part is faulty i take it.?

            What would cause it to fail.?

            Will replacing it get me back up running.?

            With the Bridge Rectifier i removed - is that part ok with it reading 0 from 1-4, can i put it back in.?

            Sorry for all the questions, i appreciate the help!!
            Last edited by liamoc74; 02-18-2015, 11:18 AM.

            Comment


              #7
              Re: Philips 42PFL5522D/05 Not Powering

              You will need to replace the FET and the IC responsible for driving the FET... You can usually find this IC by tracing back the gate pin on the FET.

              You have to replace the IC because the IC can be invisibly damaged by the FET failing. If it is bad it can kill a new FET and cause other damage.
              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


                #8
                Re: Philips 42PFL5522D/05 Not Powering

                Okay sound, found the fet on ebay for a couple of quid..

                With the IC, is it the one ive noted in the pic..?

                How can i test with multimeter, try'd continuity but no joy..

                Pic attached..
                Attached Files

                Comment


                  #9
                  Re: Philips 42PFL5522D/05 Not Powering

                  That's the one.

                  BTW: It's source, not supply. The source is the most negative end of the transistor so is in fact the opposite of a supply. You can remember it's a "source" because the electrons flow out of it (in a conventional current model), whereas for the "drain" they drain into the transistor.
                  Last edited by tom66; 02-18-2015, 12:57 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


                    #10
                    Re: Philips 42PFL5522D/05 Not Powering

                    Aha I see, makes sense when you put it like that!
                    Ill get that out tomor and get parts ordered and well see how it goes from there.

                    Cheers for your help!!

                    Comment


                      #11
                      Re: Philips 42PFL5522D/05 Not Powering

                      Any ideas where i can get the ic from..

                      Number on front is...

                      5501/1D07021

                      On the rear is
                      PHILIP
                      PINES

                      Any ideas - done some looking but nothing coming up..

                      Cheers

                      Comment


                        #12
                        Re: Philips 42PFL5522D/05 Not Powering

                        Are you sure it's "5501" and not something like, "S501"? Could you get a picture of the markings?
                        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


                          #13
                          Re: Philips 42PFL5522D/05 Not Powering

                          Seems to be

                          5501A 1D07021
                          not
                          5501/1D07021

                          Still cant find anything tho..
                          Attached Files

                          Comment


                            #14
                            Re: Philips 42PFL5522D/05 Not Powering

                            The "A" gives me this, a FUJI FA5500A PFC controller IC:
                            https://cdn.badcaps-static.com/pdfs/...e9f5f9227d.pdf

                            Available from ~£7
                            http://www.ebay.co.uk/sch/i.html?_fr...5500A&_sacat=0
                            Last edited by tom66; 02-19-2015, 10:54 AM.
                            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


                              #15
                              Re: Philips 42PFL5522D/05 Not Powering

                              Google FA5501A it's a power supply control IC.
                              tom beat me to it.

                              Comment


                                #16
                                Re: Philips 42PFL5522D/05 Not Powering

                                BTW, once you remove the FET and the IC, check the resistors and diodes in the gate area of the transistor. They usually survive but sometimes they can be damaged, if so it would be good to replace them too.
                                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


                                  #17
                                  Re: Philips 42PFL5522D/05 Not Powering

                                  Ah deadly - thanks!!

                                  Where did you get the FA from tho.?

                                  Will check, then order bits and post results, prob be a couple of days

                                  About to open a new thread on another tv too if you can have a look!!

                                  Thanks again..

                                  Comment


                                    #18
                                    Re: Philips 42PFL5522D/05 Not Powering

                                    I know it is a PFC controller, in SO8 package so I typed "top marking 5500A PFC controller so8" and it was one of the top results
                                    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


                                      #19
                                      Re: Philips 42PFL5522D/05 Not Powering

                                      Ah yeah, tricks of the trade sorta stuff!!

                                      Comment


                                        #20
                                        Re: Philips 42PFL5522D/05 Not Powering

                                        Okay, I got the ic and fet ordered!

                                        Tested all the resistors, all good..altho the one on top left "R604" has different markings on it, 2 little squares..what do these mean!

                                        The diode "D605" is reading 130 with leads each way, that means its bad right.?
                                        Looking at the diode, all i can see is a 0 at the bottom, what does this indicate.?

                                        Also, trying to find info on testing smt caps but not getting anything solid, some people saying ya cant test them in circuit, some say you can but i cant seem to get any readings - anyone guide me in the right direction!!

                                        Thanks
                                        Attached Files

                                        Comment

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