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No 5V found in this Circuit, Please help me.

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    #21
    Re: No 5V found in this Circuit, Please help me.

    Need voltage PQ67
    Drain
    Source
    Gate

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      #22
      Re: No 5V found in this Circuit, Please help me.

      This seems ok but what is the main problem? Anyway thank you lot for share your experience and try to help me.

      Comment


        #23
        Re: No 5V found in this Circuit, Please help me.

        Originally posted by Compute View Post
        Need voltage PQ67
        Drain
        Source
        Gate
        On 1,2,6 pin

        Comment


          #24
          Re: No 5V found in this Circuit, Please help me.

          PQ67 pin 1 source connected to ground and gate , drain are 0v.

          Comment


            #25
            Re: No 5V found in this Circuit, Please help me.

            Originally posted by nazrul145 View Post
            This seems ok but what is the main problem? Anyway thank you lot for share your experience and try to help me.
            Not normally.
            PQ14 pulls to the ground
            EN_ 5V through PR82, respectively , on the first pin PU11 - 0 volts.
            I found this datasheet PWM , it says that on votage EN1 / EN2 must be high level, and you have the first pin low level, because open PQ14
            Last edited by Compute; 02-15-2015, 03:38 AM.

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              #26
              Re: No 5V found in this Circuit, Please help me.

              PQ67 gate goes to 3.3v when press power button and that time pin6 drain = 0v. is that ok?

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                #27
                Re: No 5V found in this Circuit, Please help me.

                PR224 to have 5 volts on both sides ?

                Comment


                  #28
                  Re: No 5V found in this Circuit, Please help me.

                  Originally posted by nazrul145 View Post
                  is that ok?
                  In this case, yes.

                  Comment


                    #29
                    Re: No 5V found in this Circuit, Please help me.

                    PR224 both side 0v.

                    Comment


                      #30
                      Re: No 5V found in this Circuit, Please help me.

                      so as 0?

                      Comment


                        #31
                        Re: No 5V found in this Circuit, Please help me.

                        yes PR224 is 0v

                        Comment


                          #32
                          Re: No 5V found in this Circuit, Please help me.

                          In schematic PL9 sys5v is 0v so than pr224 also 0v

                          Comment


                            #33
                            Re: No 5V found in this Circuit, Please help me.

                            Originally posted by Compute View Post
                            so as 0?
                            It does not matter ... I misunderstood
                            What's PQ18

                            Comment


                              #34
                              Re: No 5V found in this Circuit, Please help me.

                              I mixed with sys5v and vreg5

                              Comment


                                #35
                                Re: No 5V found in this Circuit, Please help me.

                                Need voltage PQ18
                                Drain
                                Source
                                Gate

                                Comment


                                  #36
                                  Re: No 5V found in this Circuit, Please help me.

                                  pq18 gate= 0v and drain 4.57v and source ground.

                                  Comment


                                    #37
                                    Re: No 5V found in this Circuit, Please help me.

                                    Thanks A lot. Many many many thanks to u. I connect U23 Pin 107 to pq18 gate and this motherboard power up. i will check everything and lets you know.

                                    Comment


                                      #38
                                      Re: No 5V found in this Circuit, Please help me.

                                      Originally posted by nazrul145 View Post
                                      pq18 gate= 0v
                                      must be 3.3

                                      Comment


                                        #39
                                        Re: No 5V found in this Circuit, Please help me.

                                        Originally posted by nazrul145 View Post
                                        I connect U23 Pin 107 to pq18 gate and this motherboard power up
                                        Motherboard works now?
                                        With a translator difficult to communicate

                                        Comment


                                          #40
                                          Re: No 5V found in this Circuit, Please help me.

                                          Yes motherboard works fully ok. A great thanks to you for find this problem.
                                          Can you please give me asus X451ma Schematic. This laptop also 5v ok but 3.3v miss. Anyway thanks again.

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