Philips 40PFL3505D/F7 Blows fuse when plugged in

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  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA

    #41
    Re: Philips 40PFL3505D/F7 Blows fuse when plugged in

    When you use the lamp and try to power up the TV, if the TV uses 200W then using 200W lamp will not be enough, it is like you have 200W lamps in series so each lamp will only get half the Voltage to run.
    When I test the power supply board, I will test the board by itself first since the only circuit will draw the power will be the standby power supply, if the lamp lights up brightly and stays bright then I know I still have bad circuits some where, for example with shorted MOSFET for the PFC, that shorts will be there without turning on the PFC circuit.
    I then force on the power supply while monitoring the Voltage on the main cap to see if I see the boosted Voltage or not, If do see the boosted Voltage and other Voltages that are turned on by the PS-ON the more likely the power supply is OK.
    So using 200W is not going to be enough to run the TV since the TV consumes 200W of power.
    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

    • Shane711
      Badcaps Veteran
      • Dec 2014
      • 493
      • USA

      #42
      Re: Philips 40PFL3505D/F7 Blows fuse when plugged in

      I have a Bad 1M200Z diode on my board. This is the only part I can find bad that may be causing the fuse to blow. So I found the equivalent to be 1N4741A or NTE5105A. It seems these are 1 amp. I want to install an equivalent that will not blow as easy.

      It is just after the rectifier diodes so it must be for power spikes. I have some P6KE220CA Bidirectional Diodes 600W 220v TVS. I wonder if I add one of these will it help or hurt?

      Basically I want to upgrade the circuit, make it better.

      Comment

      • Shane711
        Badcaps Veteran
        • Dec 2014
        • 493
        • USA

        #43
        Re: Philips 40PFL3505D/F7 Blows fuse when plugged in

        I figured it would be safe if I powered on the TV without the diode so I replaced the fuse and it didn't blow a fuse. TV turned on right away and big crack right in the center.

        I am still going to fix the power board.

        And that diode is at location D1208 if anyone is curios.

        Comment

        • dick_barton
          Badcaps Legend
          • Aug 2015
          • 6642
          • Wales

          #44
          Re: Philips 40PFL3505D/F7 Blows fuse when plugged in

          The problem with modification is that you can make the failure even more traumatic should the fault condition repeat. So unless it's a manufacturers update I'd be a little wary.
          If you are selling the set or it's a paid for repair I would not want it going pear shape and come back at me.
          Just my five-pence worth.

          The 1N4741A as you have found is a substitute device for it.
          Willing to help but I'm no expert.

          Comment

          • Shane711
            Badcaps Veteran
            • Dec 2014
            • 493
            • USA

            #45
            Re: Philips 40PFL3505D/F7 Blows fuse when plugged in

            I went and ordered the 1N4741A diode.

            Comment

            • Shane711
              Badcaps Veteran
              • Dec 2014
              • 493
              • USA

              #46
              Re: Philips 40PFL3505D/F7 Blows fuse when plugged in

              Ah, problem here. The 1N4741A diode was not the right diode. I put it in and it blew. So I think I figured out why. The diode is suppose to be 190V or 200V and this diode is 11V. I don't think that is going to work.

              I see in the previous listing someone said Z4KE200A should be used. Is this correct? Looks good to me. It works between 190V to 210V

              Comment

              • budm
                Badcaps Legend
                • Feb 2010
                • 40746
                • USA

                #47
                Re: Philips 40PFL3505D/F7 Blows fuse when plugged in

                Originally posted by Shane711
                Ah, problem here. The 1N4741A diode was not the right diode. I put it in and it blew. So I think I figured out why. The diode is suppose to be 190V or 200V and this diode is 11V. I don't think that is going to work.

                I see in the previous listing someone said Z4KE200A should be used. Is this correct? Looks good to me. It works between 190V to 210V
                1M200Z is 200V ZENER DIODE, so where does the 11V spec come from, 1N4741? How did the 1N4741 (11V) come about to be the replacement for the 1M200Z?
                http://www.mouser.com/ProductDetail/...Zq9JC0ow%3D%3D
                How is the original diode being used? As a snubber?
                Attached Files
                Last edited by budm; 07-12-2016, 09:54 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

                • Shane711
                  Badcaps Veteran
                  • Dec 2014
                  • 493
                  • USA

                  #48
                  Re: Philips 40PFL3505D/F7 Blows fuse when plugged in

                  Look at this eBay search link. All the listings say 11V.

                  http://www.ebay.com/sch/i.html?_from...4741A&_sacat=0

                  I bought mine off eBay. I also searched online and they all say 11V everywhere I look.

                  Comment

                  • budm
                    Badcaps Legend
                    • Feb 2010
                    • 40746
                    • USA

                    #49
                    Re: Philips 40PFL3505D/F7 Blows fuse when plugged in

                    Originally posted by Shane711
                    Look at this eBay search link. All the listings say 11V.

                    http://www.ebay.com/sch/i.html?_from...4741A&_sacat=0

                    I bought mine off eBay. I also searched online and they all say 11V everywhere I look.
                    I corrected my typo.
                    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

                    • Shane711
                      Badcaps Veteran
                      • Dec 2014
                      • 493
                      • USA

                      #50
                      Re: Philips 40PFL3505D/F7 Blows fuse when plugged in

                      I guess it was my mistake and dick_Barton said it was right. It is not right. Not even close.

                      The Z4KE200A sounds better than the 1M200Z, what do you think?

                      Comment

                      • budm
                        Badcaps Legend
                        • Feb 2010
                        • 40746
                        • USA

                        #51
                        Re: Philips 40PFL3505D/F7 Blows fuse when plugged in

                        Originally posted by Shane711
                        I guess it was my mistake and dick_Barton said it was right. It is not right. Not even close.

                        The Z4KE200A sounds better than the 1M200Z, what do you think?
                        The Z4KE200 will be fine.
                        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

                        • Shane711
                          Badcaps Veteran
                          • Dec 2014
                          • 493
                          • USA

                          #52
                          Re: Philips 40PFL3505D/F7 Blows fuse when plugged in

                          OK, I will order the Z4KE200A

                          I can't seem to find any 1M200Z. That Mouser page says you have to order 5,000 pieces. I can order 100 Z4KE200A for about $26.00 from Mouser.

                          Comment

                          • Shane711
                            Badcaps Veteran
                            • Dec 2014
                            • 493
                            • USA

                            #53
                            Re: Philips 40PFL3505D/F7 Blows fuse when plugged in

                            So they are ordered. I just retested the board and everything else seems to be OK. Now I just have to wait for them to be delivered. Yesterday was my birthday, as you can tell by my user name.

                            Comment

                            • Shane711
                              Badcaps Veteran
                              • Dec 2014
                              • 493
                              • USA

                              #54
                              Re: Philips 40PFL3505D/F7 Blows fuse when plugged in

                              OK, so I got the Z4KE200A diode today and installed it. Working great. Not blowing the fuse. This TV is a closed case

                              Comment

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