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xbox 360 150w, no 12V

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  • mosfetratus
    Sure Not
    • Feb 2019
    • 146
    • Resistron

    xbox 360 150w, no 12V

    Doesn't provide 12V.
    When 5v stand by is manually shorted to pwr. en. pin power supply provides power, but when i release jumper it shuts off, doesn't register/hold enable signal.

    traced enable pin to "LTA502SI-1". I couldn't find datasheets to it.

    Looking for advice, if this is the right suspect.
  • mosfetratus
    Sure Not
    • Feb 2019
    • 146
    • Resistron

    #2
    Re: xbox 360 150w, no 12V

    when i short std. by with 5V to enable 12V, green light goes for few seconds than goes red.

    Console works fine, tested with good power supply.

    Comment

    • mosfetratus
      Sure Not
      • Feb 2019
      • 146
      • Resistron

      #3
      Re: xbox 360 150w, no 12V

      Appears that part i suspected not to be working is actually OK, did switcheroo with working power supply.
      Any tips, because my knowledge about power supplies is zero.

      Comment

      • stj
        stj
        Great Sage 齊天大聖
        • Dec 2009
        • 29503
        • some shithole run by Israeli agents

        #4
        Re: xbox 360 150w, no 12V

        is it supposed to latch on?

        Comment

        • mosfetratus
          Sure Not
          • Feb 2019
          • 146
          • Resistron

          #5
          Re: xbox 360 150w, no 12V

          Originally posted by stj View Post
          is it supposed to latch on?
          no idea :\

          board photos
          https://ibb.co/3R9VvmV
          https://ibb.co/gPgc0hG

          Comment

          • mosfetratus
            Sure Not
            • Feb 2019
            • 146
            • Resistron

            #6
            Re: xbox 360 150w, no 12V

            Noticed gate voltage for output mosfets (FDPF3860T) is low, o.4V. Needed to remove glue, to see components.

            Yellow circle component is semi short between yellow points, voltage drop of 033 in diode mode. So i removed it, still same result between points.

            https://ibb.co/dPmKRZb

            Power supply does have 12V output when i short 5volts on power supply plug to simulate power button press, but soon gets RED light on the supply when holding short.

            Comment

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