Philips 40pfl5505d/f7 power supply dps-320lp

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  • ozzy214
    Badcaps Veteran
    • Nov 2013
    • 319
    • usa
    #1

    Philips 40pfl5505d/f7 power supply dps-320lp

    Trying to figure this power supply out. No 5v reference, dead as a door nail. Got power in, fuse good. Two of the mosfets on the heatsink lower left is dead, no voltage in or out. The third one has voltage on 2 legs, other 2 dead. I cant get at the mains caps to check for voltage there with the shield on. And kinda nervous benching testing live while its upside down to check from underneath. This a stock photo I got off ebay. Can you point what to check as maybe I can save it....
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    • vinceroger69
      Badcaps Legend
      • Mar 2012
      • 6714
      • uk
      #2
      Re: Philips 40pfl5505d/f7 power supply dps-320lp

      What Chassis do you have
      look at the sticker on the backside of the lcd tv we can see if we can then find a service manual

        Comment

        • ozzy214
          Badcaps Veteran
          • Nov 2013
          • 319
          • usa
          #3
          Re: Philips 40pfl5505d/f7 power supply dps-320lp

          Originally posted by vinceroger69
          What Chassis do you have
          look at the sticker on the backside of the lcd tv we can see if we can then find a service manual
          I dont have the cover for the back of the tv, so planning on keeping for myself. One of many basket cases Im resurrecting for myself. I also grew a little courage and the main caps are reading roughly 360v.

            Comment

            • CapLeaker
              Leaking Member
              • Dec 2014
              • 7982
              • Canada
              #4
              Re: Philips 40pfl5505d/f7 power supply dps-320lp

              I gues we need better pics than that.

                Comment

                • ozzy214
                  Badcaps Veteran
                  • Nov 2013
                  • 319
                  • usa
                  #5
                  Re: Philips 40pfl5505d/f7 power supply dps-320lp

                  Well I think its dead jim lol. I found one chip that according the diagram regulates the 5v line. Two of the legs were in the hole, but not even soldered!!! I tried to solder it and made a mess. For some odd reason solder was wicking onto the iron, but wouldnt wick on the legs. So unless someone here wants to try to fix my hack solder job, its toast. Sigh,...its real peculiar. I have soldered caps no issue, but the solder wouldnt "stick" to it. HMM..maybe I should just stick to replace board instead of repair lol.
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                    • CapLeaker
                      Leaking Member
                      • Dec 2014
                      • 7982
                      • Canada
                      #6
                      Re: Philips 40pfl5505d/f7 power supply dps-320lp

                      That's a question of cost, but if you have to, this board still can be repaired.

                        Comment

                        • CraigR
                          Badcaps Veteran
                          • Dec 2013
                          • 959
                          • USA
                          #7
                          Re: Philips 40pfl5505d/f7 power supply dps-320lp

                          Originally posted by ozzy214
                          Well I think its dead jim lol. I found one chip that according the diagram regulates the 5v line. Two of the legs were in the hole, but not even soldered!!! I tried to solder it and made a mess. For some odd reason solder was wicking onto the iron, but wouldnt wick on the legs. So unless someone here wants to try to fix my hack solder job, its toast. Sigh,...its real peculiar. I have soldered caps no issue, but the solder wouldnt "stick" to it. HMM..maybe I should just stick to replace board instead of repair lol.
                          I know this is old post but those legs are not used, and so nothing to solder them to.

                            Comment

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