Lenovo y50-70 boardview

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  • DeniS182
    Badcaps Veteran
    • Jun 2014
    • 328
    • Slovakia
    #1

    Lenovo y50-70 boardview

    Hi all,
    I have this laptop with burned out pcb near DC in connector. Have someone boardview for this laptop?
    Thanks.
    Attached Files
    Tags: None
    • DeniS182
      Badcaps Veteran
      • Jun 2014
      • 328
      • Slovakia
      #2
      Re: Lenovo y50-70 boardview

      I replaced PQ301 and PQ302 and connect burned out traces, but I don't have voltage on drain PQ302. On gate and source is 20V. Someone to help me? Thanks.

        Comment

        • mielta
          Badcaps Veteran
          • Apr 2015
          • 368
          • Germany
          #3
          Re: Lenovo y50-70 boardview

          Hi
          check Pacin the voltage on Gate must be lower on pq302 to work

            Comment

            • DeniS182
              Badcaps Veteran
              • Jun 2014
              • 328
              • Slovakia
              #4
              Re: Lenovo y50-70 boardview

              Pacin - pr311 - 0v

                Comment

                • mielta
                  Badcaps Veteran
                  • Apr 2015
                  • 368
                  • Germany
                  #5
                  Re: Lenovo y50-70 boardview

                  messure Pu301 pin6

                    Comment

                    • smali
                      Badcaps Veteran
                      • Sep 2014
                      • 287
                      • Pakistan
                      #6
                      Re: Lenovo y50-70 boardview

                      check pq307(A&B)dual fet and pin6 connectivity with pr301&pq305 base.

                        Comment

                        • DeniS182
                          Badcaps Veteran
                          • Jun 2014
                          • 328
                          • Slovakia
                          #7
                          Re: Lenovo y50-70 boardview

                          PU301 - pin 6 - 0V
                          pq307 - pin 6 connectivity with pr301&pq305 base is ok
                          but pr301 to VIN is not connected, I connected it with wire.
                          pq307 seems to be ok, I test it with continuity.

                            Comment

                            • mielta
                              Badcaps Veteran
                              • Apr 2015
                              • 368
                              • Germany
                              #8
                              Re: Lenovo y50-70 boardview

                              check PR309-vin

                                Comment

                                • DeniS182
                                  Badcaps Veteran
                                  • Jun 2014
                                  • 328
                                  • Slovakia
                                  #9
                                  Re: Lenovo y50-70 boardview

                                  PR309- ok and 0V
                                  U have boardview ?

                                    Comment

                                    • smali
                                      Badcaps Veteran
                                      • Sep 2014
                                      • 287
                                      • Pakistan
                                      #10
                                      Re: Lenovo y50-70 boardview

                                      Check pc301 short circuit ..

                                        Comment

                                        • DeniS182
                                          Badcaps Veteran
                                          • Jun 2014
                                          • 328
                                          • Slovakia
                                          #11
                                          Re: Lenovo y50-70 boardview

                                          pc301 is not shorted

                                            Comment

                                            • DeniS182
                                              Badcaps Veteran
                                              • Jun 2014
                                              • 328
                                              • Slovakia
                                              #12
                                              Re: Lenovo y50-70 boardview

                                              Fixed, problem was in PR309 - wasn't connected to VIN.
                                              Thanks all for answers.

                                                Comment

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