Pm_a_hpc_s_mv_mb_v1 5v ic no output

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  • NConstantinou
    Badcaps Veteran
    • May 2017
    • 326
    • Cyprus

    #1

    Pm_a_hpc_s_mv_mb_v1 5v ic no output

    Dear all

    i have the above m/b with 3.3/5v voltage regulator SN0608098 IC.
    i have the 3.3v but not the 5v.
    i have replaced ic but still no 5v output.
    on pin 17 VBST I HAVE 4.76v.
    on pin 16 LL1 and pin 15 DRVH1 I HAVE NOTHING.

    DOES ANYONE HAVE ANY IDEA!!!!!!!!!

    THANKS
  • Techtiger
    Badcaps Legend
    • Oct 2014
    • 1601
    • france

    #2
    Re: Pm_a_hpc_s_mv_mb_v1 5v ic no output

    Remove a Pad of the _+5V ALWS & Check the Resistance to GND upload the Schmatic

    Comment

    • kropotkin
      Oscilloscoopper
      • May 2018
      • 48
      • Republic of Belarus

      #3
      Re: Pm_a_hpc_s_mv_mb_v1 5v ic no output

      If it's Foxconn SAFINA, than VALW channels has separate controls, look page 32 of schematics. While 3.3V run automatically, 5V need permission from EC. What is on pin 14?
      How do you feed MB - can tell overall current consumption by MB at 19V when powered off?

      Comment

      • Techtiger
        Badcaps Legend
        • Oct 2014
        • 1601
        • france

        #4
        Re: Pm_a_hpc_s_mv_mb_v1 5v ic no output

        First are you missing +V5A on PJ543 ? If so check pin 7 if you get LDO after pin 12 Voltage?& the 249K is good or not, check VBAT PJ14 and the Voltage on D1 PQ850?

        Comment

        • NConstantinou
          Badcaps Veteran
          • May 2017
          • 326
          • Cyprus

          #5
          Re: Pm_a_hpc_s_mv_mb_v1 5v ic no output

          Originally posted by techtiger
          Remove a Pad of the _+5V ALWS & Check the Resistance to GND upload the Schmatic


          by removing PAD PJ25 the resistance to GND is 1.1KΩ

          Originally posted by techtiger
          Remove a Pad of the _+5V ALWS & Check the Resistance to GND upload the Schmatic


          The resistance to GND is 1.1kΩ

          Originally posted by kropotkin
          If it's Foxconn SAFINA, than VALW channels has separate controls, look page 32 of schematics. While 3.3V run automatically, 5V need permission from EC. What is on pin 14?
          How do you feed MB - can tell overall current consumption by MB at 19V when powered off?


          Pin 14 is EN1, reads 120mv.
          MB is feed with bench power supplyat 2.5A
          By removing the pad PJ25 i get resistance to GND 1.1KΩ

          Originally posted by techtiger
          First are you missing +V5A on PJ543 ? If so check pin 7 if you get LDO after pin 12 Voltage?& the 249K is good or not, check VBAT PJ14 and the Voltage on D1 PQ850?

          Yes i am missing +V5A.
          Pin 7 has 4.75V. i checked on PR174.
          PJ14 has 18V
          Attached Files
          Last edited by piernov; 03-13-2020, 05:01 AM.

          Comment

          • Techtiger
            Badcaps Legend
            • Oct 2014
            • 1601
            • france

            #6
            Re: Pm_a_hpc_s_mv_mb_v1 5v ic no output

            Originally posted by NConstantinou




            by removing PAD PJ25 the resistance to GND is 1.1KΩ
            which side of the PJ251.1KΩ and other side of the Pad ? what is resistance to GND PJ24 ?

            Comment

            • Techtiger
              Badcaps Legend
              • Oct 2014
              • 1601
              • france

              #7
              Re: Pm_a_hpc_s_mv_mb_v1 5v ic no output

              Originally posted by NConstantinou
              Originally posted by techtiger
              First are you missing +V5A on PJ543 ? If so check pin 7 if you get LDO after pin 12 Voltage?& the 249K is good or not, check VBAT PJ14 and the Voltage on D1 PQ850?

              Yes i am missing +V5A.
              Pin 7 has 4.75V. i checked on PR174.
              PJ14 has 18V
              remove PCE18 220uf Cap and check resistance to GND Buzz Mode M-Meter PJ25 both side of the pad , PR170 249K is correct or not ?
              Last edited by piernov; 03-13-2020, 05:02 AM.

              Comment

              • kropotkin
                Oscilloscoopper
                • May 2018
                • 48
                • Republic of Belarus

                #8
                Re: Pm_a_hpc_s_mv_mb_v1 5v ic no output

                Originally posted by NConstantinou
                Pin 14 is EN1, reads 120mv.
                So, You have no permitiion from EC to start +5VALW. What the symptoms do you have now from board - any reaction to PRWSW?
                There might be few reasons of EN1 missing - even wrong BIOS or dead SB820. Remove RTC battery and make thermotest fo it with hot air, 300C fo 30sec.

                Comment

                • NConstantinou
                  Badcaps Veteran
                  • May 2017
                  • 326
                  • Cyprus

                  #9
                  Re: Pm_a_hpc_s_mv_mb_v1 5v ic no output

                  Originally posted by techtiger
                  which side of the PJ251.1KΩ and other side of the Pad ? what is resistance to GND PJ24 ?

                  The resistance to GND with+PCE19 is 1.28KΩ.
                  On PJ25 the resistance to GND betwwen GND and + PCE19 is 1.28ΚΩ also
                  PJ25 and PJ 24 Pads are disolder.

                  Comment

                  • NConstantinou
                    Badcaps Veteran
                    • May 2017
                    • 326
                    • Cyprus

                    #10
                    Re: Pm_a_hpc_s_mv_mb_v1 5v ic no output

                    Originally posted by techtiger
                    remove PCE18 220uf Cap and check resistance to GND Buzz Mode M-Meter PJ25 both side of the pad , PR170 249K is correct or not ?
                    PR170 measures 170.8 KΩ instead of 249k without removing cap.
                    should i remove cap!

                    the PCE18 cap is setting on a base. when i tried before to pull out cap
                    one leg was destroyed. i am afraid to remove it unless if i try to disorder from mb

                    Comment

                    • NConstantinou
                      Badcaps Veteran
                      • May 2017
                      • 326
                      • Cyprus

                      #11
                      Re: Pm_a_hpc_s_mv_mb_v1 5v ic no output

                      Originally posted by techtiger
                      remove PCE18 220uf Cap and check resistance to GND Buzz Mode M-Meter PJ25 both side of the pad , PR170 249K is correct or not ?

                      PR170 measures 170.8 KΩ instead of 249k without removing cap.
                      should i remove cap!

                      the PCE18 cap is setting on a base. when i tried before to pull out cap
                      one leg was destroyed. i am afraid to remove it unless if i try to disorder from mb

                      Comment

                      • NConstantinou
                        Badcaps Veteran
                        • May 2017
                        • 326
                        • Cyprus

                        #12
                        Re: Pm_a_hpc_s_mv_mb_v1 5v ic no output

                        Originally posted by kropotkin
                        So, You have no permitiion from EC to start +5VALW. What the symptoms do you have now from board - any reaction to PRWSW?
                        There might be few reasons of EN1 missing - even wrong BIOS or dead SB820. Remove RTC battery and make thermotest fo it with hot air, 300C fo 30sec.

                        Board indicates that there is NO short.do you suggest to remove RTC and heat SB820 to 300C for 30seconds!

                        Comment

                        • kropotkin
                          Oscilloscoopper
                          • May 2018
                          • 48
                          • Republic of Belarus

                          #13
                          Re: Pm_a_hpc_s_mv_mb_v1 5v ic no output

                          at least it takes 1 minute instead of desoldering capacitors. Same capacitor should be placed back. Did you try to flash bios first?
                          Look at page 5 of schematics - setting of EN_1 for 5VALW - marked as the first event during platform initialisation, before - only SB and EC are working. Importnt is that AC_OK from charger must be apropriate.

                          Comment

                          • NConstantinou
                            Badcaps Veteran
                            • May 2017
                            • 326
                            • Cyprus

                            #14
                            Re: Pm_a_hpc_s_mv_mb_v1 5v ic no output

                            Originally posted by kropotkin
                            at least it takes 1 minute instead of desoldering capacitors. Same capacitor should be placed back. Did you try to flash bios first?
                            Look at page 5 of schematics - setting of EN_1 for 5VALW - marked as the first event during platform initialisation, before - only SB and EC are working. Importnt is that AC_OK from charger must be apropriate.

                            i will try to find adaptor and flash bios and i will come back to you

                            thanks

                            Comment

                            • Techtiger
                              Badcaps Legend
                              • Oct 2014
                              • 1601
                              • france

                              #15
                              Re: Pm_a_hpc_s_mv_mb_v1 5v ic no output

                              Originally posted by NConstantinou
                              PR170 measures 170.8 KΩ instead of 249k without removing cap.
                              should i remove cap!

                              the PCE18 cap is setting on a base. when i tried before to pull out cap
                              one leg was destroyed. i am afraid to remove it unless if i try to disorder from mb
                              You have to replace that cap Pce18 later, most Probably you didn’t apply heat correctly for the moment don’t replace PR170 you have to find out why EN1 Not getting Required, check if it’s not short to GND or preheat as Kropotkin Have point out
                              Last edited by Techtiger; 03-13-2020, 09:43 AM.

                              Comment

                              • Techtiger
                                Badcaps Legend
                                • Oct 2014
                                • 1601
                                • france

                                #16
                                Re: Pm_a_hpc_s_mv_mb_v1 5v ic no output

                                What voltage you get SIO pin 4 74 127

                                Comment

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