M961 mbx-224 rev 1.1 no power

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  • kalilinux25
    Badcaps Legend
    • Mar 2018
    • 2084
    • ZAMBOANGA SIBUGAY

    #1

    M961 mbx-224 rev 1.1 no power

    Im not getting any 19v in the pin 5,6,7,8 pin ? why does this problem occur?

  • Techtiger
    Badcaps Legend
    • Oct 2014
    • 1601
    • france

    #2
    Re: M961 mbx-224 rev 1.1 no power

    DC in PCN2 pin 12 connect with Fuse PF1 you should get 19V their if you have 19V over there the move to PL1 PL2 both side 19V if no voltage one of the 3 components short
    After test cap PC123 PC125 PC126 PC20 PR133 PR138 (with power and without in resistance mode)
    send a feed back

    Comment

    • on/off
      Badcaps Veteran
      • Oct 2016
      • 333
      • Indonesia

      #3
      Re: M961 mbx-224 rev 1.1 no power

      Originally posted by kalilinux25
      Im not getting any 19v in the pin 5,6,7,8 pin ? why does this problem occur?
      You didn't mention any component. ICs or Mosfets?

      Comment

      • kalilinux25
        Badcaps Legend
        • Mar 2018
        • 2084
        • ZAMBOANGA SIBUGAY

        #4
        Re: M961 mbx-224 rev 1.1 no power

        Originally posted by on/off
        You didn't mention any component. ICs or Mosfets?
        I dont have 19 v in pq2 sorry

        Comment

        • kalilinux25
          Badcaps Legend
          • Mar 2018
          • 2084
          • ZAMBOANGA SIBUGAY

          #5
          Re: M961 mbx-224 rev 1.1 no power

          I have 19v in tp190 but in PQ2 mosfet in pin 5,6,7,8 I dont have any voltage

          Comment

          • Techtiger
            Badcaps Legend
            • Oct 2014
            • 1601
            • france

            #6
            Re: M961 mbx-224 rev 1.1 no power

            BQ24753 (PU3) IC Voltage in Pin2.3.4.5.13 ?
            PQ 2 voltage in Pin 123 4 ?.test your mosfet out of the Mob in Diode mode

            Comment

            • mcplslg123
              Badcaps Legend
              • Jun 2015
              • 7262
              • india

              #7
              Re: M961 mbx-224 rev 1.1 no power

              Originally posted by kalilinux25
              I dont have 19 v in pq2 sorry
              If you have lab power supply, inject some voltage on pin5-6-7-8 of pq2 and see if anything gets hot. You are most likely having short in B+ line.

              Comment

              • zpi
                Senior Member
                • Feb 2018
                • 132
                • Lithuania

                #8
                Re: M961 mbx-224 rev 1.1 no power

                Check if you do not have short to ground on pin 5, if you dont, then short pin 1 to pin 5.

                Comment

                • sparrow2719
                  Senior Member
                  • Oct 2015
                  • 69
                  • Indonesia

                  #9
                  Re: M961 mbx-224 rev 1.1 no power

                  Check pq1 and pq2 for short.
                  Check the pin 4 on pq1 and pq2, it is driven by ACDRV# voltage PU3

                  If there is no voltage on ACDRV# the pq1 and pq2 will not conduct and passing the voltage.

                  Comment

                  • khaahk
                    Badcaps Veteran
                    • Dec 2013
                    • 755
                    • Estonia

                    #10
                    Re: M961 mbx-224 rev 1.1 no power

                    Originally posted by sparrow2719
                    If there is no voltage on ACDRV# the pq1 and pq2 will not conduct and passing the voltage.
                    Those are P-channel mosfets.

                    Comment

                    • sparrow2719
                      Senior Member
                      • Oct 2015
                      • 69
                      • Indonesia

                      #11
                      Re: M961 mbx-224 rev 1.1 no power

                      Originally posted by khaahk
                      Those are P-channel mosfets.
                      Uups my bad, didn't see the arrow mark pointed out on pq1 and pq2...

                      Comment

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