Card Reader to USB wiring help please

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  • IamPritesh
    Badcaps Veteran
    • Aug 2017
    • 354
    • India
    #1

    Card Reader to USB wiring help please

    So i have this Compaq Presario C700 whose USB does not work. It has 5V and powers up the usb device but end us as unrecognized device.
    Upon checking the out of the two data signal only one has 3.3 volt and the other one no voltage at all.

    The card reader does work as it should. I was hoping if someone knows how to make a wiring so we can use the card reader data lines work with USB.

    Appreciate your help. Thanks
    Tags: None
    • ktmmotocross
      Boardkiller
      • Feb 2014
      • 3572
      • slovakia
      #2
      Re: Card Reader to USB wiring help please

      look at the schematic

      find it by board code

        Comment

        • IamPritesh
          Badcaps Veteran
          • Aug 2017
          • 354
          • India
          #3
          Re: Card Reader to USB wiring help please

          Originally posted by ktmmotocross
          look at the schematic

          find it by board code
          Schematic attached but I am not sure how to do this.
          Attached Files
          Last edited by IamPritesh; 01-27-2019, 01:55 PM. Reason: Fixed - Attachment

            Comment

            • ktmmotocross
              Boardkiller
              • Feb 2014
              • 3572
              • slovakia
              #4
              Re: Card Reader to USB wiring help please

              this is maintenance manual not schematic

              put board code to google

                Comment

                • IamPritesh
                  Badcaps Veteran
                  • Aug 2017
                  • 354
                  • India
                  #5
                  Re: Card Reader to USB wiring help please

                  Originally posted by ktmmotocross
                  this is maintenance manual not schematic

                  put board code to google
                  Sorry about that. Uploaded the correct schematic.
                  Attached Files

                    Comment

                    • ktmmotocross
                      Boardkiller
                      • Feb 2014
                      • 3572
                      • slovakia
                      #6
                      Re: Card Reader to USB wiring help please

                      on page 27 find your connector and check its state

                        Comment

                        • IamPritesh
                          Badcaps Veteran
                          • Aug 2017
                          • 354
                          • India
                          #7
                          Re: Card Reader to USB wiring help please

                          OK the Card reader does not work however the webcam, does work. Has anyone ever successfully repaired a USB using Webcam data signals ?

                          Do yo just connect the data lines of webcam to data lines of usb ? I am sure there must be more to it. I dont want to ruin a working laptop with wrong wiring . Please help.

                            Comment

                            • ktmmotocross
                              Boardkiller
                              • Feb 2014
                              • 3572
                              • slovakia
                              #8
                              Re: Card Reader to USB wiring help please

                              all usb have the same lines. if one of yours reader is missing, and connector is good than u have bad ICH or cracked ball under it

                                Comment

                                • IamPritesh
                                  Badcaps Veteran
                                  • Aug 2017
                                  • 354
                                  • India
                                  #9
                                  Re: Card Reader to USB wiring help please

                                  Originally posted by ktmmotocross
                                  all usb have the same lines. if one of yours reader is missing, and connector is good than u have bad ICH or cracked ball under it
                                  The reader and the USB is not working. All have +5V and the usb has data+ but no data- signal. I suspect it is the the ICH. However the webcam is still working fine which also gets the signal data+ and data- from the ICH. I was hoping we can have a hack that would enable the USB using these webcam signal.
                                  I have heard someone on this forum do it, just dont remember who.

                                    Comment

                                    • ktmmotocross
                                      Boardkiller
                                      • Feb 2014
                                      • 3572
                                      • slovakia
                                      #10
                                      Re: Card Reader to USB wiring help please

                                      webcam is just another usb device. see lines at bottom of page 20

                                        Comment

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