ACLU1/ACLU2 UMA NM-A272 REV 1.0 problem

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  • kalilinux25
    Badcaps Legend
    • Mar 2018
    • 2069
    • ZAMBOANGA SIBUGAY
    #1

    ACLU1/ACLU2 UMA NM-A272 REV 1.0 problem

    Hi I have a motherboard the problem is I don,t have any voltage in PU1207 in pin 2 missing 1.35v

    How can i troubleshoot this problem the laptop has no power

    [IMG][/IMG]
    Tags: None
    • mcplslg123
      Badcaps Legend
      • Jun 2015
      • 7262
      • india
      #2
      Re: ACLU1/ACLU2 UMA NM-A272 REV 1.0 problem

      Nothing is visible on your image.

        Comment

        • Techtiger
          Badcaps Legend
          • Oct 2014
          • 1601
          • france
          #3
          Re: ACLU1/ACLU2 UMA NM-A272 REV 1.0 problem

          its LENOVO G50-70 Schematics page 55
          TPS51716 MISSING 1.35V

          remove the jumper PJ316 PJ317 and measure voltage if you have 1.35V fault is after if not measure voltage
          pins
          12 +5VALW
          6 VREF
          20 PGOOD
          16 S5
          17 S3
          1
          2

          jumper PJ309 +B
          Attached Files

            Comment

            • kalilinux25
              Badcaps Legend
              • Mar 2018
              • 2069
              • ZAMBOANGA SIBUGAY
              #4
              Re: ACLU1/ACLU2 UMA NM-A272 REV 1.0 problem

              Originally posted by techtiger
              its LENOVO G50-70 Schematics page 55
              TPS51716 MISSING 1.35V

              remove the jumper PJ316 PJ317 and measure voltage if you have 1.35V fault is after if not measure voltage
              pins
              12 +5VALW
              6 VREF
              20 PGOOD
              16 S5
              17 S3
              1
              2

              jumper PJ309 +B


              I've tried but no 1.35v have detected on pin 2 and pin 13

                Comment

                • kalilinux25
                  Badcaps Legend
                  • Mar 2018
                  • 2069
                  • ZAMBOANGA SIBUGAY
                  #5
                  Re: ACLU1/ACLU2 UMA NM-A272 REV 1.0 problem

                  Originally posted by kalilinux25
                  I've tried but no 1.35v have detected on pin 2 and pin 13
                  When I test diode mode in pin 7 and pin 2 it beep means its shorted

                    Comment

                    • Nat123
                      Member
                      • Aug 2019
                      • 24
                      • Peru
                      #6
                      Re: ACLU1/ACLU2 UMA NM-A272 REV 1.0 problem

                      Originally posted by techtiger
                      its LENOVO G50-70 Schematics page 55
                      TPS51716 MISSING 1.35V

                      remove the jumper PJ316 PJ317 and measure voltage if you have 1.35V fault is after if not measure voltage
                      pins
                      12 +5VALW
                      6 VREF
                      20 PGOOD
                      16 S5
                      17 S3
                      1
                      2

                      jumper PJ309 +B

                        Comment

                        • ecggold
                          New Member
                          • Jun 2021
                          • 2
                          • Philippines
                          #7
                          Re: ACLU1/ACLU2 UMA NM-A272 REV 1.0 problem

                          dim display problem where is the location of data ic in this model

                            Comment

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