Sony MBX-250 Usb problem

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • lgf700b
    Member
    • Oct 2013
    • 16
    • Turkey

    #1

    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
  • tomodachi
    Badcaps Veteran
    • Apr 2012
    • 593
    • Turkey

    #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

    • lgf700b
      Member
      • Oct 2013
      • 16
      • Turkey

      #3
      Re: Sony MBX-250 Usb problem

      Originally posted by tomodachi
      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

      • tomodachi
        Badcaps Veteran
        • Apr 2012
        • 593
        • Turkey

        #4
        Re: Sony MBX-250 Usb problem

        Originally posted by lgf700b
        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

        • lgf700b
          Member
          • Oct 2013
          • 16
          • Turkey

          #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

          • tomodachi
            Badcaps Veteran
            • Apr 2012
            • 593
            • Turkey

            #6
            Re: Sony MBX-250 Usb problem

            Originally posted by lgf700b
            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

            • yonseiwilly
              New Member
              • Mar 2014
              • 1
              • Chile

              #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

              • mohamed.mostafa
                Member
                • Sep 2012
                • 40
                • egypt

                #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

                Related Topics

                Collapse

                • Chrissygizmo
                  Sony KD-55XG9505 lines on screen problem
                  by Chrissygizmo
                  Hello again everyone,

                  This is my latest mission, to try getting this Sony tv back to normal working order…

                  I've only just got it today, when you power it up everything is as should be, in fact it works perfectly for a few minutes then the screen starts getting horizontal lines on & eventually the full screen goes back, I will upload photos of the problem & also some photos of the board etc. You might notice that I'm busy trying the tape method, I'm not sure exactly where the clock lines are so I'm just guessing & hoping for the best lol . I've already tried...
                  02-19-2025, 11:31 AM
                • crackedprint
                  Sony HCD-HX80R Amplifier Volume Control Problem
                  by crackedprint
                  I have a strange fault on a Sony amplifier. The volume control varies the display from MIN, then 1 up to 30 and then MAX as expected. At MIN there is no sound. However, at 1 it is quite loud and increasing above 1 does not change the sound level.

                  I have tried a Cold Reset as per the service manual.

                  I have looked at the I2C clock and data to volume control chip IC501 (BD3499FV). Data is only sent to IC501 when the volume is set to MIN or 1. At any other setting no data is sent to IC501.

                  I have looked all the way through the service manual and tried many online...
                  01-21-2025, 12:18 PM
                • retrorepair
                  SONY KDL-40P3600 Picture Problem
                  by retrorepair
                  Hello gurus, hope you can assist me...

                  I have a Sony KDL.40P3600, with an issue on the left side of the screen (pictures attached).

                  I think the problem is the panel, but before send it to trash, i would like to get a second opinion.

                  Thanks in advance.
                  10-11-2024, 05:12 PM
                • YasaCh
                  sony kd-49xf9005 4 red blinking problem
                  by YasaCh
                  Sony KD-49XF9005 it power up to android boot screen and turns off immediately with continuously 4 red blinks ...
                  05-05-2025, 08:40 AM
                • theone111
                  Problem with LG Plasma 60PM6700 - Random power downs
                  by theone111
                  I have an LG Plasma TV 60PM6700 for the past ~12 years.

                  In the last ~3-4 months I have been having some issues.
                  1. Problem: It started with random picture disappearing (sound still worked).
                    Frequency: Happened about once a week.
                    Solution: Had to turn off TV wait a few seconds before turning it on again.
                  2. Problem: Then it got worse and the TV started to shut down and when turning on the no picture just sound.
                    Frequency: Happened about once a week.
                    Solution: Had to turn off TV wait about 10-20 seconds and turn it on again to solve.
                  3. Problem: TV shuts down
                  ...
                  07-22-2024, 10:36 AM
                • Loading...
                • No more items.
                Working...