What is this electronic component?

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  • royfang2293
    Member
    • Jun 2011
    • 10

    #1

    What is this electronic component?

    Can you please help me identify this electronic part?
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  • dumpystig
    Badcaps Veteran
    • Jul 2011
    • 485
    • UK

    #2
    Re: What is this electronic component?

    Looks like a cap to me
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    • mariushm
      Badcaps Legend
      • May 2011
      • 3799

      #3
      Re: What is this electronic component?

      Actually, as it says there on the board "PD", I would say both are some sort of power diodes.
      The one on the left could be this one:

      FAIRCHILD SEMICONDUCTOR - SS34 - DIODE, SCHOTTKY, 3A, SMD, DO-214
      http://export.farnell.com/_/dp/1470970
      Last edited by mariushm; 09-08-2011, 03:08 PM.

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      • dumpystig
        Badcaps Veteran
        • Jul 2011
        • 485
        • UK

        #4
        Re: What is this electronic component?

        It looks like every component designator (R = resistor, C = capacitor etc.) is preceded by a 'P' for some reason.
        Just noticed the one on the left, I imagine that will be a diode.

        Maybe the 'P' is for Power board...
        System: HP xw6600 Workstation, 650W PSU | 2x Intel Xeon Quad E5440 @2.83GHz | 8x 1GB FB-DDR2 @ 667MHz | Kingston/Intel X25-M 160GB SSD | 2x 1TB Spinpoint F3, RAID0 | 1x 1TB Spinpoint F3, backup | ATI FireGL V7700 512MB | Sony Optiarc DVD +/-RW | Win 7 Ultimate x64 | 2x Dell UltraSharp U2410f | Dell E248WFP

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        • royfang2293
          Member
          • Jun 2011
          • 10

          #5
          Re: What is this electronic component?

          uhm interesting.

          Now, Am wondering if a bad capacitor could be causing the power to continuously recycle -causing a strange humming sound. It is a very low humming sound however.

          thank you for your help thus far.

          Comment

          • dumpystig
            Badcaps Veteran
            • Jul 2011
            • 485
            • UK

            #6
            Re: What is this electronic component?

            I doubt the P signifies 'power Cap', 'Power resistor' etc. - look at that tiny resistor on the left, no way is that a power component.
            System: HP xw6600 Workstation, 650W PSU | 2x Intel Xeon Quad E5440 @2.83GHz | 8x 1GB FB-DDR2 @ 667MHz | Kingston/Intel X25-M 160GB SSD | 2x 1TB Spinpoint F3, RAID0 | 1x 1TB Spinpoint F3, backup | ATI FireGL V7700 512MB | Sony Optiarc DVD +/-RW | Win 7 Ultimate x64 | 2x Dell UltraSharp U2410f | Dell E248WFP

            Comment

            • dumpystig
              Badcaps Veteran
              • Jul 2011
              • 485
              • UK

              #7
              Re: What is this electronic component?

              Ah, you edited your post...
              System: HP xw6600 Workstation, 650W PSU | 2x Intel Xeon Quad E5440 @2.83GHz | 8x 1GB FB-DDR2 @ 667MHz | Kingston/Intel X25-M 160GB SSD | 2x 1TB Spinpoint F3, RAID0 | 1x 1TB Spinpoint F3, backup | ATI FireGL V7700 512MB | Sony Optiarc DVD +/-RW | Win 7 Ultimate x64 | 2x Dell UltraSharp U2410f | Dell E248WFP

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              • royfang2293
                Member
                • Jun 2011
                • 10

                #8
                Re: What is this electronic component?

                The board is from a laptop that gets power from an ac adapter which may explain why those resistors aren't very big? lol Am not a genius at electronics.

                Comment

                • royfang2293
                  Member
                  • Jun 2011
                  • 10

                  #9
                  Re: What is this electronic component?

                  Other than "p" stands for power, I have no other clue what it might stand for lol.

                  Comment

                  • royfang2293
                    Member
                    • Jun 2011
                    • 10

                    #10
                    Re: What is this electronic component?

                    Well, it is pretty convincing I mean. The "P" only show up near the battery area and the ac adapter socket area.

                    Comment

                    • mockingbird
                      Badcaps Legend
                      • Dec 2008
                      • 5484
                      • -

                      #11
                      Re: What is this electronic component?

                      That, if I'm not mistaken (At least the one on the right), is a tantalum capacitor.

                      Comment

                      • royfang2293
                        Member
                        • Jun 2011
                        • 10

                        #12
                        Re: What is this electronic component?

                        Ok very nice. Now does anyone know how to read the codes on the capacitor that tell you what the ratings are? I might think about replacing them

                        Comment

                        • mockingbird
                          Badcaps Legend
                          • Dec 2008
                          • 5484
                          • -

                          #13
                          Re: What is this electronic component?

                          Can you take a caliper and measure them?

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                          • royfang2293
                            Member
                            • Jun 2011
                            • 10

                            #14
                            Re: What is this electronic component?

                            Caliper? sounds high tech. I don't really have a caliper but i think i can measure it in mm with an ordinary ruler. It is 8x5 mm.

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                            • mockingbird
                              Badcaps Legend
                              • Dec 2008
                              • 5484
                              • -

                              #15
                              Re: What is this electronic component?

                              So I'm looking at the two big ones on the right-hand side, the ones with the markings:
                              330 6DS7 D...

                              I looked at a few pictures from various manufacturers, I just can't find anything. I'll try to keep looking. Where did this come out of?

                              Comment

                              • masud
                                Badcaps Veteran
                                • Jul 2011
                                • 317
                                • Bangladesh

                                #16
                                Re: What is this electronic component?

                                Obviously,

                                PQ= Capacitor &
                                PD= Diod.
                                Last edited by masud; 09-08-2011, 10:47 PM.

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                                • PCBONEZ
                                  Grumpy Old Fart
                                  • Aug 2005
                                  • 10661
                                  • USA

                                  #17
                                  Re: What is this electronic component?

                                  PD = Power Diode

                                  The others are PC.
                                  Which I think must mean > Power Capacitor.
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                                  • royfang2293
                                    Member
                                    • Jun 2011
                                    • 10

                                    #18
                                    Re: What is this electronic component?

                                    Oh, this came out of a neoware laptop. Now, the company is owned by hp.

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                                    • momaka
                                      master hoarder
                                      • May 2008
                                      • 12170
                                      • Bulgaria

                                      #19
                                      Re: What is this electronic component?

                                      Originally posted by mockingbird
                                      That, if I'm not mistaken (At least the one on the right), is a tantalum capacitor.
                                      It looks like a Tantalum cap to me as well. Best solution is to check it with a multimeter out of the circuit - if it shows open circuit both ways when you measure it for continuity, then it's more than likely a capacitor. If it shows a [continuous] reading one way but not the other, then it's a diode. If it shows short circuit regardless of which way you test it, it's obviously a bad component.

                                      Also, Tantalum caps usually commit a pretty nasty suicide when they go bad (i.e. they burn out - literally), so if it's a Tantalum, it's unlikely to be bad if it reads normal.

                                      With that said, I would suggest you check the rest of the components in the charging circuit - particularly power rails being shorted to ground. The buzzing could be because there is an overload in the charging/power circuit somewhere.

                                      Originally posted by masud
                                      PQ= Capacitor
                                      No.
                                      PQ is for transistor. Just ignore the "P" prefix and you can see that this board has standard marking. C = capacitor, D = diode, R = resistor, Q = transistor, L = inductor.

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