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    magnavox 37mf337b/37 parts advice

    Hi! I am a new member and love the site! Thanks for all of the information, very helpful!!

    I have a MAGNAVOX Model:37mf337b/37 that currently has the squeak/squeal going on. The Stock CapXon Caps are currently present in the t.v. @ a rating of 1000uf 35v.The three caps will need replacing due to bulging, also I tested the Diodes and found that two need replaced:

    ZD902 (KE12 74) tested at .017 and .017, D912 (RD) tested at .001 and .001 while installed to PSU.

    What brand of caps should be used?
    What are the correct diodes that I will need?
    Part #'s, Brands, any advice would be helpful.

    I can be more specific if necessary, Thanks again!!
    Attached Files
    Last edited by zombslayer; 08-13-2012, 01:51 AM. Reason: PIC

    #2
    Re: magnavox 37mf337b/37 parts advice

    These are suggested:-

    http://www.digikey.com/product-detai...445-ND/2433579

    + shipping about 3 bucks

    Panasonic FR - low ESR, high ripple current, very long lifespan.

    Just check the diameter (12.5mm x 20mm) will fit.

    The diodes - I believe UF4007 is tossed around here - http://www.digikey.com/product-detai...ICT-ND/3340246
    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: magnavox 37mf337b/37 parts advice

      Thank You! for such a quick response! I will be sure to check diameter.

      Comment


        #4
        Re: magnavox 37mf337b/37 parts advice

        Isn't ZD mean zener diode?

        Comment


          #5
          Re: magnavox 37mf337b/37 parts advice

          Hello! Yes, from what i understand ZD is zener diode. So does anyone know which ZD I will need? I will be ordering the parts described as above, but would like to make sure that I have a regular diode and a zener diode.
          Thanks again!!

          Comment


            #6
            Re: magnavox 37mf337b/37 parts advice

            Originally posted by zombslayer View Post
            Hello! Yes, from what i understand ZD is zener diode. So does anyone know which ZD I will need? I will be ordering the parts described as above, but would like to make sure that I have a regular diode and a zener diode.
            Thanks again!!
            I dont understand what you are asking - you have the board there what are the part numbers of the parts you want- is the part number you originally quoted not the number off ZD902 " ZD902 (KE12 74)" Is that not correct?

            Test them again off the board.
            Please upload pictures using attachment function when ask for help on the repair
            http://www.badcaps.net/forum/showthread.php?t=39740

            Comment


              #7
              Re: magnavox 37mf337b/37 parts advice

              I will retest out of board and report my results. I am needing a KE12 74 , which is ZD902. I was just making sure I do not replace a ZD w/a regular diode.. I am not sure if uf4007 would be good for both faulty diodes.
              Thanks for the quick responses, this site is amazing!!

              Comment


                #8
                Re: magnavox 37mf337b/37 parts advice

                You can always check by looking at the data sheets for the part numbers.
                Even if you dont fully understand them ( I dont) you can usually get enough
                info for basic comparison. Just google the part number and download the data sheet ( Pdf file)
                Please upload pictures using attachment function when ask for help on the repair
                http://www.badcaps.net/forum/showthread.php?t=39740

                Comment


                  #9
                  Re: magnavox 37mf337b/37 parts advice

                  I will do that! When I do find the info. I will be sure to pass it on. I will keep this thread open and update my progress. I am pretty good with electronics, this is my first tv and is a good learning experience.

                  Comment


                    #10
                    Re: magnavox 37mf337b/37 parts advice

                    Is there a chassis number on the model number sticker?
                    Pleas remove that zener diode, it should have number with PKEXXXX on it, it is Zener Diode for the snubber circuits, will be in 200V range.
                    Last edited by budm; 08-13-2012, 12:30 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


                      #11
                      Re: magnavox 37mf337b/37 parts advice

                      PSU # is 715T2484-4, there is a barcode also on PSU with ADPF24220R1P/P5PB74752533 as I am not sure what those numbers stand for. The back of the tv its self has model# and serial #.

                      Comment


                        #12
                        Re: magnavox 37mf337b/37 parts advice

                        Most PHILIPS/MANAVOX TV's have chassi number printed on the model number sticker to tell the service technician which chassis being used inside the TV since same model can have more than one version of the chassis. Any number on that PKE ZENER Diode?
                        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


                          #13
                          Re: magnavox 37mf337b/37 parts advice

                          "Any number on that PKE ZENER Diode?"
                          Thought he has already said twice it is a KE1274
                          Please upload pictures using attachment function when ask for help on the repair
                          http://www.badcaps.net/forum/showthread.php?t=39740

                          Comment


                            #14
                            Re: magnavox 37mf337b/37 parts advice

                            From the picture, I can see KE2XXX. I do not see KE12XX. I expect it to be P6KE2XXX. I expect it to be 200v Zener.
                            His circuit may be similar to this one. I need to find the chassis number to look up the service manual.
                            http://www.mouser.com/ProductDetail/...k9x0jN%252bFfF
                            Attached Files
                            Last edited by budm; 08-13-2012, 12:57 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


                              #15
                              Re: magnavox 37mf337b/37 parts advice

                              ZD902 is p6ke120a/744, now that i do see it. I am guessing i should replace with a P6ke120a? Thanks.
                              Diode tester reveals .019 and .019 out of PSU.
                              Last edited by zombslayer; 08-13-2012, 01:20 PM. Reason: info.

                              Comment


                                #16
                                Re: magnavox 37mf337b/37 parts advice

                                Digikey:
                                http://www.digikey.com/product-detai...ACT-ND/2770358

                                That is pretty low voltage rating for Snubber.
                                The other Diode D912 more likely to be UF4007, but take it out of the circuit to check and get the number off the body.
                                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


                                  #17
                                  Re: magnavox 37mf337b/37 parts advice

                                  I will definitely take D912 out,confirm the body numbers and diode test . I really appreciate all the input, I could not have done it without BADCAPS!! Thanks for the schematics as well VERY HANDY thing to have.

                                  Comment


                                    #18
                                    Re: magnavox 37mf337b/37 parts advice

                                    The diagram I post is not the exact as your power supply, but it shows how the Diodes are used.
                                    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


                                      #19
                                      Re: magnavox 37mf337b/37 parts advice

                                      I will search for the chassis number, I am interested in that now. The diagram is great in showing how the diodes are used, very interesting stuff.

                                      Comment


                                        #20
                                        Re: magnavox 37mf337b/37 parts advice

                                        Make sure you are keeping a written record where all these parts of coming from on the board. You sometimes get so many you forget from time to time. I also like to take a picture of the board before I start taking parts off of it.
                                        Have you ever stopped to think and then forget to start thinking again?

                                        As a very wise man once said on this forum: "Of all the things I have lost I miss my mind the most."

                                        Comment

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