OCZ technology OCZ500SXS PS

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  • sandrabrnelic
    Member
    • Mar 2012
    • 34
    • Croatia

    #1

    OCZ technology OCZ500SXS PS

    Hi !

    I'm new here on forum and i hope i can learn something about PS repair from experienced people here.

    My problem is PS from title. It's OCZ but inside is FSP group FSP500-60GLY(NEW2) board. The problem is that 12V and 5V outputs are to low when PS is under load. 5V is low (4.6V) even without load. I have changed all caps at 5V and 12V outputs but problem is still there. I have checked shottkey diodes at output and they are all ok. What should i check next ?
  • 999999999
    Badcaps Veteran
    • Sep 2006
    • 774
    • USA

    #2
    Re: OCZ technology OCZ500SXS PS

    Has it always been like this? I mean is it new and arrived like this or did it work previously, and is it possible it worked previously meaning it powered a system but was always too low on 5V & 12V rails?

    Might just be a pot contact or misadjustment issue.

    There is a potentiometer inside in front of the transoformer, yes? It has a little orange adjustment screw, use a fine tipped marker to mark the screw and body of the pot to indicate what it's initial dial position was, then turn it back and forth several times with power OFF. Next with it on by jumpering the connector green PS_On signal to a black ground wire, turn the pot slightly one way and/or the other while reading the voltages.

    I suggest doing this without it connected to a computer to make sure all rails (not just 5V and 12V, but especially also 3.3V) are within spec before hooking it up to the computer again to do load testing to more finely tune the adjustment of the pot.

    Ideally you would use an insulated screwdriver since there's live mains + high DC voltage present. Be careful.

    Comment

    • sandrabrnelic
      Member
      • Mar 2012
      • 34
      • Croatia

      #3
      Re: OCZ technology OCZ500SXS PS

      It was working previously, but it started to make problems. PC began to have problems and started to reset itself in the middle of work without obvious reason. And later it had problems even to start. After i have realised it's PS problem i have changed PS but since i have some experience in electronics i have decided to learn something about power supplyes ... so i'm here now.

      Regarding a potentiometer contact i think it is ok because i forgot to mention that PS outputs are not stable (they oscillate +/- 0,3V). I have tried to move pot and it can rise 5V voltage to 5V but only when i turn it full to the end but voltages are not stable. Problem must be somewhere else. I will look at outputs with scope later (when i get it) so maybe this will help ...

      Thank you for your efforts, and forgive me for my crappy english.

      Comment

      • tom66
        EVs Rule
        • Apr 2011
        • 32560
        • UK

        #4
        Re: OCZ technology OCZ500SXS PS

        Your English is better than my Croatian!

        What brands of capacitor are used in the power supply?
        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

        • sandrabrnelic
          Member
          • Mar 2012
          • 34
          • Croatia

          #5
          Re: OCZ technology OCZ500SXS PS

          Capxon

          Comment

          • tom66
            EVs Rule
            • Apr 2011
            • 32560
            • UK

            #6
            Re: OCZ technology OCZ500SXS PS

            Originally posted by sandrabrnelic
            Capxon
            That could be your problem, do any feel like they are not flat (bulging) when you touch them?
            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

            • c_hegge
              Badcaps Legend
              • Sep 2009
              • 5219
              • Australia

              #7
              Re: OCZ technology OCZ500SXS PS

              ^
              he said he already replaced them (at least for the rails in question).
              I love putting bad caps and flat batteries in fire and watching them explode!!

              No wonder it doesn't work! You installed the jumper wires backwards

              Main PC: Core i7 3770K 3.5GHz, Gigabyte GA-Z77M-D3H-MVP, 8GB Kingston HyperX DDR3 1600, 240GB Intel 335 Series SSD, 750GB WD HDD, Sony Optiarc DVD RW, Palit nVidia GTX660 Ti, CoolerMaster N200 Case, Delta DPS-600MB 600W PSU, Hauppauge TV Tuner, Windows 7 Home Premium

              Office PC: HP ProLiant ML150 G3, 2x Xeon E5335 2GHz, 4GB DDR2 RAM, 120GB Intel 530 SSD, 2x 250GB HDD, 2x 450GB 15K SAS HDD in RAID 1, 1x 2TB HDD, nVidia 8400GS, Delta DPS-650BB 650W PSU, Windows 7 Pro

              Comment

              • tom66
                EVs Rule
                • Apr 2011
                • 32560
                • UK

                #8
                Re: OCZ technology OCZ500SXS PS

                Originally posted by c_hegge
                ^
                he said he already replaced them (at least for the rails in question).
                Hmm, did he replace good caps with CapXon, or CapXon with good caps?
                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

                • PeteS in CA
                  Badcaps Legend
                  • Aug 2005
                  • 3579
                  • USA, Unsure of Planet

                  #9
                  Re: OCZ technology OCZ500SXS PS

                  What frequency are the O/Ps "oscillating" at? If at 100Hz, then the I/P caps are a likely cause.
                  PeteS in CA

                  Power Supplies should be boring: No loud noises, no bright flashes, and no bad smells.
                  ****************************
                  To kill personal responsibility, initiative or success, punish it by taxing it. To encourage irresponsibility, improvidence, dependence and failure, reward it by subsidizing it.
                  ****************************

                  Comment

                  • sandrabrnelic
                    Member
                    • Mar 2012
                    • 34
                    • Croatia

                    #10
                    Re: OCZ technology OCZ500SXS PS

                    .... 4 months later ....

                    Thank you Pete, it was just like you said

                    In the meantime i have built C/ESR meter which helps me a lot to detect dead caps ...

                    I have found dead Taepo on primary side (100uF/25V). Changed it and my OCZ is again working like new one.
                    Last edited by sandrabrnelic; 07-17-2012, 01:22 AM.

                    Comment

                    • Rulycat
                      Badcaps Veteran
                      • Apr 2010
                      • 724
                      • United Kingdom

                      #11
                      Re: OCZ technology OCZ500SXS PS

                      You wouldn't mind sharing how you built the ESR meter, would you?

                      Comment

                      • ben7
                        Capaholic
                        • Jan 2011
                        • 4059
                        • USA

                        #12
                        Re: OCZ technology OCZ500SXS PS

                        Originally posted by Rulycat
                        You wouldn't mind sharing how you built the ESR meter, would you?

                        Theres a few circuits on the web, namely this one.
                        Muh-soggy-knee

                        Comment

                        • ben7
                          Capaholic
                          • Jan 2011
                          • 4059
                          • USA

                          #13
                          Re: OCZ technology OCZ500SXS PS

                          Originally posted by PhilipWinkel
                          bumb ubm!
                          Wut?
                          Muh-soggy-knee

                          Comment

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