Wrong power supply ?

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  • bianchi77
    Badcaps Legend
    • Jun 2016
    • 1121
    • Australia

    #1

    Wrong power supply ?

    Everyone,

    I accidentally put a wrong power supply on my old Harddrive...
    I put 12V into 5V and 5V to 12V...
    What could be wrong with it ?

    Any experiences ?

    Cheers
  • bianchi77
    Badcaps Legend
    • Jun 2016
    • 1121
    • Australia

    #2
    Re: Wrong power supply ?

    Could it be only ST2L05 3300 broken ?

    Comment

    • mariushm
      Badcaps Legend
      • May 2011
      • 3799

      #3
      Re: Wrong power supply ?

      Grab a multimeter and test... if you're lucky maybe you only blew a fuse or a protection diode.
      Focus on 12v going to 5v trances in hdd... 5v in 12v probably didn't damage anything.

      Comment

      • eccerr0r
        Solder Sloth
        • Nov 2012
        • 8701
        • USA

        #4
        Re: Wrong power supply ?

        depends on the hard drive, SATA? PATA? Could have fried most everything on the board, or could have simply fried the regulators on board...

        Comment

        • bianchi77
          Badcaps Legend
          • Jun 2016
          • 1121
          • Australia

          #5
          Re: Wrong power supply ?

          it's PATA, I'm thinking my regulator is burned, it's ST2L05 3300...?
          Do you reckon...?

          Comment

          • bianchi77
            Badcaps Legend
            • Jun 2016
            • 1121
            • Australia

            #6
            Re: Wrong power supply ?

            Here are the PCB photos...
            Attached Files

            Comment

            • bianchi77
              Badcaps Legend
              • Jun 2016
              • 1121
              • Australia

              #7
              Re: Wrong power supply ?

              Probably some or all of the Transient Voltage Suppressors (TVS) are faulty ?

              Comment

              • 6BW6
                Senior Member
                • Jan 2015
                • 55
                • UK

                #8
                Re: Wrong power supply ?

                I'd be worried about the electrolytic capacitors on the 5V line, you can guarantee they will be no more than about 6V dc working, looking at the picture they do look alright.

                If worse comes to worse, I'm wondering if you can swap the board must be the same type and number, I would guess the hard drive size is important too, that's the very last thing I'd say, other than that checkl what components you can on the 5V line.

                Edit:
                Here's the data sheet for the regulator http://www.st.com/content/ccc/resour...CD00003344.pdf

                It seems the maximum input is 7V (page 7).... so you could be right in thinking it's a goner.

                Dave
                Last edited by 6BW6; 10-09-2016, 11:23 AM.

                Comment

                • bianchi77
                  Badcaps Legend
                  • Jun 2016
                  • 1121
                  • Australia

                  #9
                  Re: Wrong power supply ?

                  Originally posted by 6BW6
                  I'd be worried about the electrolytic capacitors on the 5V line, you can guarantee they will be no more than about 6V dc working, looking at the picture they do look alright.

                  If worse comes to worse, I'm wondering if you can swap the board must be the same type and number, I would guess the hard drive size is important too, that's the very last thing I'd say, other than that checkl what components you can on the 5V line.

                  Edit:
                  Here's the data sheet for the regulator http://www.st.com/content/ccc/resour...CD00003344.pdf

                  It seems the maximum input is 7V (page 7).... so you could be right in thinking it's a goner.

                  Dave
                  Which one is the filter caps for 5V line ? any schematic for this board ?
                  I think 12V will kill those 5V caps....

                  Comment

                  • budm
                    Badcaps Legend
                    • Feb 2010
                    • 40746
                    • USA

                    #10
                    Re: Wrong power supply ?

                    Just trace the 5V pin to see where it goes to, there should be caps connected to the 5V power supply line.
                    Also check the resistance between GND and 5V line to see if it shows<10 Ohms.
                    Last edited by budm; 10-09-2016, 04:56 PM.
                    Never stop learning
                    Basic LCD TV and Monitor troubleshooting guides.
                    http://www.badcaps.net/forum/showthr...956#post305956

                    Voltage Regulator (LDO) testing:
                    http://www.badcaps.net/forum/showthr...999#post300999

                    Inverter testing using old CFL:
                    http://www.badcaps.net/forum/showthr...er+testing+cfl

                    Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                    http://s807.photobucket.com/user/budm/library/

                    TV Factory reset codes listing:
                    http://www.badcaps.net/forum/showthread.php?t=24809

                    Comment

                    • bianchi77
                      Badcaps Legend
                      • Jun 2016
                      • 1121
                      • Australia

                      #11
                      Re: Wrong power supply ?

                      Ok, I will and post what I find...

                      Comment

                      • 6BW6
                        Senior Member
                        • Jan 2015
                        • 55
                        • UK

                        #12
                        Re: Wrong power supply ?

                        I agree with budm..... but do check visually for cracks, leakage or any other damage, trouble is they may not test short circuit.

                        If you get stuck, find the supply input pin to the chip and work backwards to source.... no harm in routing out this pin and doing a check to ground.

                        Dave

                        Comment

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