CAPACITOR EXPLODED on RCA VCR VR501

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  • lemite
    New Member
    • Nov 2012
    • 4
    • Philippines

    #1

    CAPACITOR EXPLODED on RCA VCR VR501

    Does anybody knows what is the value of C4 of the power supply module of RCA VCR Model number VR501? This unit was plugged to 220VAC and the big capacitor exploded.
    Attached Files
  • Pentium4
    CapXon Be Gone
    • Sep 2011
    • 3741
    • USA

    #2
    Re: CAPACITOR EXPLODED on RCA VCR VR501

    Looks like C4 was what went off in there It'd be pretty hard to tell...that cap evaporated.

    Comment

    • eccerr0r
      Solder Sloth
      • Nov 2012
      • 8693
      • USA

      #3
      Re: CAPACITOR EXPLODED on RCA VCR VR501

      I'd guess 330 or 470 microfarads 400 volt.. But it's only a guess. It will probably work with a 470 to be safe but I think the 330 probably will work too.

      I'm only guessing based on the facts:
      this appears to be a switching power supply
      this appears to be the mains filter capacitor
      only one mains capacitor
      220VAC
      estimate around 100 W PSU
      Does not look like like a heavy duty power supply like a PC
      not a tiny supply like a phone charger

      But this is merely a guess...

      Comment

      • ben7
        Capaholic
        • Jan 2011
        • 4059
        • USA

        #4
        Re: CAPACITOR EXPLODED on RCA VCR VR501

        WOW!!!

        Woo, exploded capacitor carnage porn!

        I would say that it is an 82uF 400v cap, or maybe 100uF 400v.

        Check the bridge rectifier for shorts, and also the fuse will need replacing.

        Did you find the covering of the capacitor? that may give us a clue to it's ratings.

        Looks like ther was something blocking the top vent of it, and it just built up pressure. Must have been very loud!!!
        Muh-soggy-knee

        Comment

        • lemite
          New Member
          • Nov 2012
          • 4
          • Philippines

          #5
          Re: CAPACITOR EXPLODED on RCA VCR VR501

          Originally posted by ben7
          WOW!!!

          Woo, exploded capacitor carnage porn!

          I would say that it is an 82uF 400v cap, or maybe 100uF 400v.

          Check the bridge rectifier for shorts, and also the fuse will need replacing.

          Did you find the covering of the capacitor? that may give us a clue to it's ratings.

          Looks like there was something blocking the top vent of it, and it just built up pressure. Must have been very loud!!!
          I forgot to inform everybody that this unit for 110volts AC was plugged to 220VAC. Yes indeed, it was a very loud explosion! Somebody forgot to use step-up transformer. Unfortunately, the covering was totally unrecognizable.

          Comment

          • mariushm
            Badcaps Legend
            • May 2011
            • 3799

            #6
            Re: CAPACITOR EXPLODED on RCA VCR VR501

            The fuse seems to be gone as well.

            If it blew up from plugging at 220v, then the capacitor was probably only rated for 180-250v
            Based on the size of it, I would guess 200-330uF

            Comment

            • smason
              Badcaps Legend
              • Feb 2010
              • 1652
              • Canada

              #7
              Re: CAPACITOR EXPLODED on RCA VCR VR501

              Blowed up real good!
              36 Monitors, 3 TVs, 4 Laptops, 1 motherboard, 1 Printer, 1 iMac, 2 hard drive docks and one IP Phone repaired so far....

              Comment

              • larrymoencurly
                Badcaps Veteran
                • Oct 2004
                • 960
                • USA

                #8
                Re: CAPACITOR EXPLODED on RCA VCR VR501

                In my old Panasonic VCR, designed for 120VAC, it was 120uF, 200V.

                Comment

                • japlytic
                  Badcaps Legend
                  • Oct 2005
                  • 2086
                  • Australia

                  #9
                  Re: CAPACITOR EXPLODED on RCA VCR VR501

                  It took a fair amount of energy for this to happen... and a client of mine connected a 120VAC JVC AM/FM tuner to 240VAC - causing the primary of the power transformer to fail, but in this case, it did not damage anything outside the power supply board.
                  My first choice in quality Japanese electrolytics is Nippon Chemi-Con, which has been in business since 1931... the quality of electronics is dependent on the quality of the electrolytics.

                  Comment

                  • ben7
                    Capaholic
                    • Jan 2011
                    • 4059
                    • USA

                    #10
                    Re: CAPACITOR EXPLODED on RCA VCR VR501

                    I bet you that the vent was too close to the lid of the PSU, and it couldn't vent. So it exploded

                    Try a 120uF 200v cap in there, replace fuse, and see what happens
                    Muh-soggy-knee

                    Comment

                    • kc8adu
                      Super Moderator
                      • Nov 2003
                      • 8832
                      • U.S.A!

                      #11
                      Re: CAPACITOR EXPLODED on RCA VCR VR501

                      being that this is a panasonic built unit the 120@200v is spot on.
                      so did c4 contain c4?

                      Comment

                      • c_hegge
                        Badcaps Legend
                        • Sep 2009
                        • 5219
                        • Australia

                        #12
                        Re: CAPACITOR EXPLODED on RCA VCR VR501

                        ^
                        Looks like it did
                        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

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