Identification help

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  • halldor89
    New Member
    • Oct 2013
    • 6
    • Iceland

    #1

    Identification help

    Hi

    I've got an brushless esc (speed controller) that was plugged in with reverse polarity. Upon inspection I found a couple of chips that look toast.

    Can anyone help me identify them, looks like the markings say AL P11 but I can't find anything (see attachments).

    I also noticed some solder balls around the mosfets, what is that?
    Attached Files
  • halldor89
    New Member
    • Oct 2013
    • 6
    • Iceland

    #2
    Re: Identification help

    Anyone?

    Comment

    • ben7
      Capaholic
      • Jan 2011
      • 4059
      • USA

      #3
      Re: Identification help

      UGH, wow, that is some nasty, cruddy solder job!

      Those are probably schottky diodes but I had a look online and didn't find anything either
      Muh-soggy-knee

      Comment

      • budm
        Badcaps Legend
        • Feb 2010
        • 40746
        • USA

        #4
        Re: Identification help

        Are those two diode connected in parallel? Is the Cathode (Banded side) connected to the incoming Positive input and the Anode connected to the Negative? They may be use as crowbar circuit protection in case the power input polarity was reversed.
        Last edited by budm; 11-22-2013, 05:29 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

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