Dell 3008wfp faulty power supply

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  • Lumberjack777
    Badcaps Veteran
    • Dec 2010
    • 464

    #321
    Re: Dell 3008wfp faulty power supply

    Originally posted by fuus
    It's been about 8 months since I first removed that irritating bezel!

    I also feel this luck, I very much look forward to this 1600p cheesecake!
    8 months eh? That IS a new record. Just kidding.

    OK. First of all, don't worry about replacing the D22 schottky diode for 4 reasons.
    1. The newer PSU's have a better diode. 2. We remember what happened last time you got into that. 3. You can always use a surge protector. And 4. "If it ain't broke, don't fix it" my Grandpa used to say.

    After your friend replaces that capacitor. With the PSU all by itself, and not connected to the main board or the inverter. You'll need to turn over the PSU. Plug it in. And you'll only get one voltage output. The 5 volt standby. I marked the ground and the positive connector pin in the lower left of the picture. That should be 5 volts or above. And steady. No fluctuations. Mine showed 5.2 volts and steady.

    All the other voltages will power up later when the main board is connected and sends back the PS_ON (power supply on). But we don't need to worry about that right now.
    Just look for that 5V standby voltage on the pin marked in the picture.
    Attached Files

    Comment

    • fuus
      Senior Member
      • Jun 2012
      • 123
      • England

      #322
      Re: Dell 3008wfp faulty power supply

      How can I tell if this PSU is a newer model? It's obviously been lying around for a while...
      If the D22 is resoldered it will be undertaken by my friend don't you worry!

      It may be 9 month even, I'll look back when I get home


      Thank you LJ7!

      Comment

      • selldoor
        Slow Learner
        • Dec 2010
        • 7870

        #323
        Re: Dell 3008wfp faulty power supply

        May have a date on the board near the manufacturers name or what is the version number on the barcode on the back of the board see pic here
        https://www.badcaps.net/forum/showpo...3&postcount=23
        Any dates on the caps?
        Please upload pictures using attachment function when ask for help on the repair
        http://www.badcaps.net/forum/showthread.php?t=39740

        Comment

        • fuus
          Senior Member
          • Jun 2012
          • 123
          • England

          #324
          Re: Dell 3008wfp faulty power supply

          I'll be home in about an hour, results / findings will be posted then

          EDIT: OK, first finding is that the boar doesn't even have a revision number (serial 6723000009P10) so I assume it's an A01

          I will test voltages now!
          Last edited by fuus; 04-11-2013, 04:56 AM.

          Comment

          • fuus
            Senior Member
            • Jun 2012
            • 123
            • England

            #325
            Re: Dell 3008wfp faulty power supply

            OK: The pin you labelled LJ7 fluctuates between 7.12 and 7.09 volts

            Comment

            • fuus
              Senior Member
              • Jun 2012
              • 123
              • England

              #326
              Re: Dell 3008wfp faulty power supply

              for comparison the dead board was an A03, and that broke

              Comment

              • selldoor
                Slow Learner
                • Dec 2010
                • 7870

                #327
                Re: Dell 3008wfp faulty power supply

                Originally posted by fuus
                OK: The pin you labelled LJ7 fluctuates between 7.12 and 7.09 volts
                Sounds a bit high to me, but may be ok at least its higher - check your meter/battery say on a 1.2/1.5v battery
                Please upload pictures using attachment function when ask for help on the repair
                http://www.badcaps.net/forum/showthread.php?t=39740

                Comment

                • fuus
                  Senior Member
                  • Jun 2012
                  • 123
                  • England

                  #328
                  Re: Dell 3008wfp faulty power supply

                  Hmm, I tried it against some 3.7v Nokia batteries and they all came out as 5V. I will try a different meter!
                  EDIT: a 1.5V battery read as 2.2V. Safe to proceed?
                  Last edited by fuus; 04-11-2013, 10:10 AM.

                  Comment

                  • fuus
                    Senior Member
                    • Jun 2012
                    • 123
                    • England

                    #329
                    Re: Dell 3008wfp faulty power supply

                    safe?

                    Comment

                    • selldoor
                      Slow Learner
                      • Dec 2010
                      • 7870

                      #330
                      Re: Dell 3008wfp faulty power supply

                      Sorry had to go and make and eat tea.
                      Yes I think it will be ok - as batterys go in meters some of them read high though they usually have a "low Battery" indicator.
                      Please upload pictures using attachment function when ask for help on the repair
                      http://www.badcaps.net/forum/showthread.php?t=39740

                      Comment

                      • fuus
                        Senior Member
                        • Jun 2012
                        • 123
                        • England

                        #331
                        Re: Dell 3008wfp faulty power supply

                        I'll test it later then! The low battery thing is iffy......

                        Comment

                        • fuus
                          Senior Member
                          • Jun 2012
                          • 123
                          • England

                          #332
                          Re: Dell 3008wfp faulty power supply

                          Dead.

                          Comment

                          • selldoor
                            Slow Learner
                            • Dec 2010
                            • 7870

                            #333
                            Re: Dell 3008wfp faulty power supply


                            what who you? dont panic. Any flash whistle pop with this event.
                            Get your meter working -your going to need it.
                            Please upload pictures using attachment function when ask for help on the repair
                            http://www.badcaps.net/forum/showthread.php?t=39740

                            Comment

                            • fuus
                              Senior Member
                              • Jun 2012
                              • 123
                              • England

                              #334
                              Re: Dell 3008wfp faulty power supply

                              No whistles no pops! I have disassembled it again and am ready for testing! I would say the dented cap has bulged very slightly. I shall work on replacing that first. If you know anything else obvious to check, please shout it out

                              Thanks!

                              Comment

                              • selldoor
                                Slow Learner
                                • Dec 2010
                                • 7870

                                #335
                                Re: Dell 3008wfp faulty power supply

                                I think ask your relative to replace that cap then we start with a level playing field
                                Please upload pictures using attachment function when ask for help on the repair
                                http://www.badcaps.net/forum/showthread.php?t=39740

                                Comment

                                • fuus
                                  Senior Member
                                  • Jun 2012
                                  • 123
                                  • England

                                  #336
                                  Re: Dell 3008wfp faulty power supply

                                  will do! I'll talk to him tonight

                                  Comment

                                  • fuus
                                    Senior Member
                                    • Jun 2012
                                    • 123
                                    • England

                                    #337
                                    Re: Dell 3008wfp faulty power supply

                                    I've arranged for him to have a look at it and proceed before Wednesday next week

                                    Comment

                                    • fuus
                                      Senior Member
                                      • Jun 2012
                                      • 123
                                      • England

                                      #338
                                      Re: Dell 3008wfp faulty power supply

                                      Being repaired tonight, should hopefully have it back by this weekend

                                      Comment

                                      • wobbin
                                        Member
                                        • Apr 2013
                                        • 18
                                        • United Kingdom

                                        #339
                                        Re: Dell 3008wfp faulty power supply

                                        Had my eye on one of these on Ebay last night - but it went for over £240 in a non working state (won't power on).... blimey that's nuts !

                                        Comment

                                        • fuus
                                          Senior Member
                                          • Jun 2012
                                          • 123
                                          • England

                                          #340
                                          Re: Dell 3008wfp faulty power supply

                                          I have hopes yet then

                                          Comment

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