Announcement

Collapse
No announcement yet.

Sony MBX-250 Usb problem

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    Sony MBX-250 Usb problem

    Me again with another usb problem. This time we have a sony laptop which has a MBX 250 motherboard. This board has 1 usb only but has another 3 usbs with ribbon cable card. 5V is ok. But rest of 3 pins are grounded. Data - and data + pins are grounded. I desoldered the usb but still same. When i measured the other 3 usb ports i get the grnd , 3.3v and 5v, all ok. Windows or dos doesnt find usb ports. I found schematic. But i couldnt find where usb data pins are connected. These are some detailed photos and schematic.





    I checked these 3 ports. Ground is ok. 5V ok. Data pins are showing 3.3v.


    Attached Files

    #2
    Re: Sony MBX-250 Usb problem

    Data uçları her ikisi de şaseye karşı kaç ohm gösteriyor ? Tamamen kısa devre ise veya 20 ohm gibi birşeyse kuzey gidik. Yok omaj varsa (400 ~ 600 ohm arası) normaldir.
    What values do you see from USB data pins to the ground with multimeter ? if they totally shorted or shows value like 20~50 ohms then PCH is corrupted. if not and shows between 400 ~ 600 then its good.

    Comment


      #3
      Re: Sony MBX-250 Usb problem

      Originally posted by tomodachi View Post
      Data uçları her ikisi de şaseye karşı kaç ohm gösteriyor ? Tamamen kısa devre ise veya 20 ohm gibi birşeyse kuzey gidik. Yok omaj varsa (400 ~ 600 ohm arası) normaldir.
      What values do you see from USB data pins to the ground with multimeter ? if they totally shorted or shows value like 20~50 ohms then PCH is corrupted. if not and shows between 400 ~ 600 then its good.
      Ohm ölçümünü şimdi denerim.Bilgisayar 2 gün öncesine kadar normal çalışıyormuş usbler ile birlikte ama birden bu usbler görmemiş. Şu an makine normal çalışıyor, usbleri görmüyor tabi. Kuzey köprüsünde problem olsa makinenin stabil çalışması mümkünmü?

      I'll try that ohm measuring. Laptop was working properly(with usbs) 2 days ago. Then suddenly ports gone off. This mobo is working normal except usb ports.

      Comment


        #4
        Re: Sony MBX-250 Usb problem

        Originally posted by lgf700b View Post
        Ohm ölçümünü şimdi denerim.Bilgisayar 2 gün öncesine kadar normal çalışıyormuş usbler ile birlikte ama birden bu usbler görmemiş. Şu an makine normal çalışıyor, usbleri görmüyor tabi. Kuzey köprüsünde problem olsa makinenin stabil çalışması mümkünmü?

        I'll try that ohm measuring. Laptop was working properly(with usbs) 2 days ago. Then suddenly ports gone off. This mobo is working normal except usb ports.
        Mümkündür, eski güney-kuzey mantığının aksine USB fonksiyonları bozulsa da çalışabiliyor. Casper anakartta başıma gelmişti. Sendeki anakartı tanımıyorum ama referans bilgi olarak belirtmek istedim. Neticede i serisi anakartlarda mantık aynı.

        Probably your HM chip is gone, try measurement and post the results here. it is possible that even in the case of USB function is gone, HM chipset won't stop working. At least it did in my case.
        Last edited by tomodachi; 02-18-2014, 09:46 AM.

        Comment


          #5
          Re: Sony MBX-250 Usb problem

          Aynen dediğin gibi çıktı biri 20 diğeri 22 ohm. Çok teşekkür ederim ilgin için.

          Just like you said. Data pins have 20-22 ohms. Thank you very much.

          Comment


            #6
            Re: Sony MBX-250 Usb problem

            Originally posted by lgf700b View Post
            Aynen dediğin gibi çıktı biri 20 diğeri 22 ohm. Çok teşekkür ederim ilgin için.

            Just like you said. Data pins have 20-22 ohms. Thank you very much.
            Nema problema, your welcome.

            Comment


              #7
              Re: Sony MBX-250 Usb problem

              lgf700b, I dont sure about the components position in the this corner of MBX250. Can you help me?. Very thanks.



              Ahh and very thanks for the esquematic.

              Comment


                #8
                Re: Sony MBX-250 Usb problem

                u have a missing capacitor no "c7002" only .
                but its not connected to the usb. the data usb 2pins connect directly to pch. "HM65".

                Comment

                Working...
                X