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    Cisco pix 506 fw psu

    Hey there !

    Been a while since I visited this lovely site ! Hope everything's alright, saw some red notification up there, hope the admin & badcaps store ain't in no trouble !!!

    So I wanted to start my cisco trainings and stuff, hooked up my FW mentioned above to the PSU, worked one day. Did the same thing the next day, nothing. Dead. Tried the spare one - worked.

    Disassembled, investigated. The PSU looks OK, no burnt spots or parts. Providing the picture. There is one indication of a failure, fortunately. The place with caps and the regulator is ''ticking'' (not like a bomb ), producing the sound twice per second. I think it is the regulator, but that's why I'm writing in here - to ask you guys if I'm right. Providing pictures.

    Appreciate the help in advance !
    Attached Files
    Mobo: MSI K8N Master2-FAR CPU: 2x Opteron 265 OC'd @ 2,25GHz RAM: 2x2GB Crucial DDR400 CL3 ECC/Buff. (ECC OFF), VGA: ASUS HD6950 2GB Reference edition FLASHED TO HD6970 HDD: 80GB ATA133 Seagate ,OnBoard: 2xGLAN, 8-Ch. Realtek audio, USB2.0/Firewire, PCIe Physx card PSU: 850W Corsair AX Case: Cooler Master HAF932 + NZXT 5 Fan Controller.

    #2
    Re: Cisco pix 506 fw psu

    ticking is either a shorted output, or a bad startup capacitor.

    change the small cap c4 next to the control chip

    and check the diodes on the other side of the transformer
    Last edited by stj; 11-09-2015, 12:27 PM.

    Comment


      #3
      Re: Cisco pix 506 fw psu

      Thanks for the advice !!

      The diodes show 470 and 778 values on the diode test. The regulators (the ones attached to the heatsink) show values between 400 - 650 when you measure the leads, but one of them shows 600 on one leg and beeps (short) on the other leg - which to me (since I'm an total amateur) is not a good sound. But I believe that removing the parts and measuring them outside the circuit is more reliable, thus will remove them and measure.

      Should I continue replacing the C4 cap if this has been discovered?
      Mobo: MSI K8N Master2-FAR CPU: 2x Opteron 265 OC'd @ 2,25GHz RAM: 2x2GB Crucial DDR400 CL3 ECC/Buff. (ECC OFF), VGA: ASUS HD6950 2GB Reference edition FLASHED TO HD6970 HDD: 80GB ATA133 Seagate ,OnBoard: 2xGLAN, 8-Ch. Realtek audio, USB2.0/Firewire, PCIe Physx card PSU: 850W Corsair AX Case: Cooler Master HAF932 + NZXT 5 Fan Controller.

      Comment


        #4
        Re: Cisco pix 506 fw psu

        it will last longer if you do, even f it's not the problem.
        make sure you use a low impedence one like a panasonic FC/M/R or a rubycon ZL for example

        Comment


          #5
          Re: Cisco pix 506 fw psu

          What's the original cap?
          Less jewellery, more gold into electrotech industry! Half of the computer problems is caused by bad contacts

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            #6
            Re: Cisco pix 506 fw psu

            25V 47uf Rubycon, which should be one of the best. Looking for a spare one now...
            Mobo: MSI K8N Master2-FAR CPU: 2x Opteron 265 OC'd @ 2,25GHz RAM: 2x2GB Crucial DDR400 CL3 ECC/Buff. (ECC OFF), VGA: ASUS HD6950 2GB Reference edition FLASHED TO HD6970 HDD: 80GB ATA133 Seagate ,OnBoard: 2xGLAN, 8-Ch. Realtek audio, USB2.0/Firewire, PCIe Physx card PSU: 850W Corsair AX Case: Cooler Master HAF932 + NZXT 5 Fan Controller.

            Comment


              #7
              Re: Cisco pix 506 fw psu

              what series of rubycon?

              Comment


                #8
                Re: Cisco pix 506 fw psu

                ''YXF'' , those should be low impendance @ 105C
                Mobo: MSI K8N Master2-FAR CPU: 2x Opteron 265 OC'd @ 2,25GHz RAM: 2x2GB Crucial DDR400 CL3 ECC/Buff. (ECC OFF), VGA: ASUS HD6950 2GB Reference edition FLASHED TO HD6970 HDD: 80GB ATA133 Seagate ,OnBoard: 2xGLAN, 8-Ch. Realtek audio, USB2.0/Firewire, PCIe Physx card PSU: 850W Corsair AX Case: Cooler Master HAF932 + NZXT 5 Fan Controller.

                Comment


                  #9
                  Re: Cisco pix 506 fw psu

                  yxf is entry level low, and it's obsolyte - think the lowest you can buy now is yxg
                  so it's pretty old.

                  Comment


                    #10
                    Re: Cisco pix 506 fw psu

                    But it's oil electrolyte if I am not mistaken so it should really work for ages. If you have a meter, try measuring it, if not, well than it's worth trying to replace it…
                    Less jewellery, more gold into electrotech industry! Half of the computer problems is caused by bad contacts

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                    Hardware Insights - power supply reviews and more!

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                      #11
                      Re: Cisco pix 506 fw psu

                      yxf are good performers - specially in audio gear.
                      but they do fail if they are near heatsinks, i'v seen a few go.

                      Comment


                        #12
                        Re: Cisco pix 506 fw psu

                        Why would they fail near heatsinks? Anyways, still haven't found a replacement one, I'm gonna hit the electro shop we have in the town tomorrow.
                        Mobo: MSI K8N Master2-FAR CPU: 2x Opteron 265 OC'd @ 2,25GHz RAM: 2x2GB Crucial DDR400 CL3 ECC/Buff. (ECC OFF), VGA: ASUS HD6950 2GB Reference edition FLASHED TO HD6970 HDD: 80GB ATA133 Seagate ,OnBoard: 2xGLAN, 8-Ch. Realtek audio, USB2.0/Firewire, PCIe Physx card PSU: 850W Corsair AX Case: Cooler Master HAF932 + NZXT 5 Fan Controller.

                        Comment


                          #13
                          Re: Cisco pix 506 fw psu

                          capacitor lifespan is directly related to heat because the liquid in it can dry out or crystalise.

                          Comment


                            #14
                            Re: Cisco pix 506 fw psu

                            More like chemically react and create compounds which are solid, not liquid. Drying may be the case of water-based electrolytes, but it is not like there is water floating inside, it's chemically bonded too.
                            Less jewellery, more gold into electrotech industry! Half of the computer problems is caused by bad contacts

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                            Hardware Insights - power supply reviews and more!

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                              #15
                              Re: Cisco pix 506 fw psu

                              Sure it's the heat that usually kills the caps, but I thought that it would be something else since you said you've seen a few go . Nevermind and thanks anyways stj, because Behemot here stated an interesting fact : " Create compounds which are solind, not liquid " . Behemot can you elaborate, please?

                              Meanwhile I'm gonna dig through my junk board to see if I can find that cap, motherboards have similar ones near the audio chip usually.
                              Mobo: MSI K8N Master2-FAR CPU: 2x Opteron 265 OC'd @ 2,25GHz RAM: 2x2GB Crucial DDR400 CL3 ECC/Buff. (ECC OFF), VGA: ASUS HD6950 2GB Reference edition FLASHED TO HD6970 HDD: 80GB ATA133 Seagate ,OnBoard: 2xGLAN, 8-Ch. Realtek audio, USB2.0/Firewire, PCIe Physx card PSU: 850W Corsair AX Case: Cooler Master HAF932 + NZXT 5 Fan Controller.

                              Comment


                                #16
                                Re: Cisco pix 506 fw psu

                                i doubt a motherboard would have low esr near the audio chip.

                                you can probably use 100uf if it's easier to find.

                                Comment


                                  #17
                                  Re: Cisco pix 506 fw psu

                                  Replacing the mentioned capacitor did no help. I've acquired all the other capacitors as well, I'll try to replace them all.
                                  Mobo: MSI K8N Master2-FAR CPU: 2x Opteron 265 OC'd @ 2,25GHz RAM: 2x2GB Crucial DDR400 CL3 ECC/Buff. (ECC OFF), VGA: ASUS HD6950 2GB Reference edition FLASHED TO HD6970 HDD: 80GB ATA133 Seagate ,OnBoard: 2xGLAN, 8-Ch. Realtek audio, USB2.0/Firewire, PCIe Physx card PSU: 850W Corsair AX Case: Cooler Master HAF932 + NZXT 5 Fan Controller.

                                  Comment


                                    #18
                                    Re: Cisco pix 506 fw psu

                                    Never seen a failed YXF in my life. If you ask me they are as reliable as caps can get.

                                    Comment


                                      #19
                                      Re: Cisco pix 506 fw psu

                                      Measured it outta circuit - no problems at all, a slightly increased impendance only.
                                      Mobo: MSI K8N Master2-FAR CPU: 2x Opteron 265 OC'd @ 2,25GHz RAM: 2x2GB Crucial DDR400 CL3 ECC/Buff. (ECC OFF), VGA: ASUS HD6950 2GB Reference edition FLASHED TO HD6970 HDD: 80GB ATA133 Seagate ,OnBoard: 2xGLAN, 8-Ch. Realtek audio, USB2.0/Firewire, PCIe Physx card PSU: 850W Corsair AX Case: Cooler Master HAF932 + NZXT 5 Fan Controller.

                                      Comment


                                        #20
                                        Re: Cisco pix 506 fw psu

                                        Originally posted by Shodan486 View Post
                                        Sure it's the heat that usually kills the caps, but I thought that it would be something else since you said you've seen a few go . Nevermind and thanks anyways stj, because Behemot here stated an interesting fact : " Create compounds which are solind, not liquid " . Behemot can you elaborate, please? .
                                        For example salts and other compounds. The electrolyte and the foils react and loose their function. Capacitance descreases, ESR increases.
                                        Less jewellery, more gold into electrotech industry! Half of the computer problems is caused by bad contacts

                                        Exclusive caps, meters and more!
                                        Hardware Insights - power supply reviews and more!

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