GPU PCB Schematics

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  • chrle
    Senior Member
    • Sep 2013
    • 158
    • slovakia

    #1

    GPU PCB Schematics

    hello,where I can find gpu PCB Schematics?

    something like this:
    Attached Files
  • Sparkey55
    Badcaps Legend
    • Jan 2010
    • 1523
    • USA

    #2
    Re: GPU PCB Schematics

    I would not call that a schematic. That is more of a parts placement/label diagram. If you had the graphics card in front of you, it would show it all on the silkscreen printing. Those type of drawings are relatively useless.

    Comment

    • chrle
      Senior Member
      • Sep 2013
      • 158
      • slovakia

      #3
      Re: GPU PCB Schematics

      Originally posted by Sparkey55
      I would not call that a schematic. That is more of a parts placement/label diagram. If you had the graphics card in front of you, it would show it all on the silkscreen printing. Those type of drawings are relatively useless.
      ok i need schematic to identify part that is missing on GPU board.

      Comment

      • SteveNielsen
        Retired Tech
        • Jun 2012
        • 2327
        • USA

        #4
        Re: GPU PCB Schematics

        You need to supply more information. What GPU board is it? What is missing? Uploading good pictures of the board will help.

        Comment

        • chrle
          Senior Member
          • Sep 2013
          • 158
          • slovakia

          #5
          Re: GPU PCB Schematics

          Asus hd 7950 -dc2t-3gd5-v2
          Attached Files

          Comment

          • re-atari
            Senior Member
            • Oct 2010
            • 136

            #6
            Re: GPU PCB Schematics

            Originally posted by chrle
            Asus hd 7950 -dc2t-3gd5-v2
            The components look like they were sheared off by blunt force

            On photo 1, the left missing component probably is a 10nF smd ceramic cap, and the right component probably a 100nF smd ceramic cap. On photo 3 it looks like a diode is missing in action (silkscreen says 'D702'). Which type of diode? Your guess is as good as mine... I can't see anything missing on the other photos.

            re-atari
            Last edited by re-atari; 01-30-2015, 04:57 PM.

            Comment

            • chrle
              Senior Member
              • Sep 2013
              • 158
              • slovakia

              #7
              Re: GPU PCB Schematics

              Originally posted by re-atari
              The components look like they were sheared off by blunt force

              On photo 1, the left missing component probably is a 10nF smd ceramic cap, and the right component probably a 100nF smd ceramic cap. On photo 3 it looks like a diode is missing in action (silkscreen says 'D702'). Which type of diode? Your guess is as good as mine... I can't see anything missing on the other photos.

              re-atari
              graphic card fell down on the floor,so this is why this parts are missing,ok I found D 702 diode from another gpu picture.
              Attached Files

              Comment

              • chrle
                Senior Member
                • Sep 2013
                • 158
                • slovakia

                #8
                Re: GPU PCB Schematics

                thank you guys ,so I need now only to identify C1467 cap

                Comment

                • re-atari
                  Senior Member
                  • Oct 2010
                  • 136

                  #9
                  Re: GPU PCB Schematics

                  Originally posted by chrle
                  graphic card fell down on the floor,so this is why this parts are missing,ok I found D 702 diode from another gpu picture.
                  Couldn't you spot the diode and other 2 components laying on the floor? Chances are you can resolder the diode right back on the board (after checking it with a multimeter, of course).

                  BTW: check the silkscreening to make sure the big component on the 2nd photo actually is a ceramic cap. It looks like the legenda is printed to the lower left, but it is only partially visible on your photo. The photos of the other board could be of help to you. And check the components surrounding the sheared off ones, I see a few looking less than pristine. C116 looks damaged. There might be other victims.

                  Edit 1: On the 2nd set of photos you uploaded you can see that both are actually ceramic caps. The left one is listed as C1600, but the part nr. of the bigger cap is not to be found on the silkscreening.

                  Edit 2: Only just now I see you indicated a 3rd cap on your first set of photos. As this one (C1467) is still in place I'd just resolder both sides. The same goes for C116 and C109. Solder one side first, and let it cool down before heating up the other solder side.

                  Consider yourself lucky if you get the board working again.

                  re-atari
                  Last edited by re-atari; 01-31-2015, 06:10 AM.

                  Comment

                  • chrle
                    Senior Member
                    • Sep 2013
                    • 158
                    • slovakia

                    #10
                    Re: GPU PCB Schematics

                    Originally posted by re-atari
                    Couldn't you spot the diode and other 2 components laying on the floor? Chances are you can resolder the diode right back on the board (after checking it with a multimeter, of course).

                    BTW: check the silkscreening to make sure the big component on the 2nd photo actually is a ceramic cap. It looks like the legenda is printed to the lower left, but it is only partially visible on your photo. The photos of the other board could be of help to you. And check the components surrounding the sheared off ones, I see a few looking less than pristine. C116 looks damaged. There might be other victims.

                    Edit 1: On the 2nd set of photos you uploaded you can see that both are actually ceramic caps. The left one is listed as C1600, but the part nr. of the bigger cap is not to be found on the silkscreening.

                    Edit 2: Only just now I see you indicated a 3rd cap on your first set of photos. As this one (C1467) is still in place I'd just resolder both sides. The same goes for C116 and C109. Solder one side first, and let it cool down before heating up the other solder side.

                    Consider yourself lucky if you get the board working again.

                    re-atari

                    Thank you re-atari , I will order new caps but how to know voltage? I need to measure good caps on board? 6.3v or 16 v?
                    Last edited by chrle; 01-31-2015, 02:16 PM.

                    Comment

                    • re-atari
                      Senior Member
                      • Oct 2010
                      • 136

                      #11
                      Re: GPU PCB Schematics

                      Originally posted by chrle
                      Thank you re-atari , I will order new caps but how to know voltage? I need to measure good caps on board? 6.3v or 16 v?
                      AFAIK ceramic smd caps are 25V, that should suffice for your card.

                      re-atari

                      Comment

                      • momaka
                        master hoarder
                        • May 2008
                        • 12168
                        • Bulgaria

                        #12
                        Re: GPU PCB Schematics

                        The video card might just run fine without those ceramic caps (and at worst display artifacts or run unstable at full load). I'm not saying you shouldn't replace them, but don't worry about them now. First get that missing diode fixed - the video card won't run without that and you can damage something if you try it. That diode is 100% vital. Observe the correct polarity too.
                        Last edited by momaka; 02-04-2015, 04:20 PM.

                        Comment

                        • chrle
                          Senior Member
                          • Sep 2013
                          • 158
                          • slovakia

                          #13
                          Re: GPU PCB Schematics

                          Originally posted by momaka
                          The video card might just run fine without those ceramic caps (and at worst display artifacts or run unstable at full load). I'm not saying you shouldn't replace them, but don't worry about them now. First get that missing diode fixed - the video card won't run without that and you can damage something if you try it. That diode is 100% vital. Observe the correct polarity too.
                          I contacted several Electronic Parts stores,but nobody have this diode..

                          Comment

                          • momaka
                            master hoarder
                            • May 2008
                            • 12168
                            • Bulgaria

                            #14
                            Re: GPU PCB Schematics

                            Well, that's not unusual.

                            No worries, though. This is the datasheet:

                            If it doesn't open, search for "SX32", and that should pop some good results.

                            It's a 3A SMD schottky diode rated for 20V reverse voltage and an average forward voltage drop of 0.5V. So just see if those parts stores carry any 3A schottky diodes - they don't have to be SMD. You can certainly use an axial diode too - the fix will just look a bit more ugly, but who cares.

                            Worst case, buy a 6A fast recovery diode/rectifier and use that. Why 6A? Because fast recovery diodes have a higher forward voltage drop (usually around 1V minimum), so it will be dissipating much more heat. Something like SPR600 will probably work. Actually even a 3A diode might work... like HER301-HER303, or MUR405, or PR3001-PR3007 <- all of these should be easily found as they are common diodes. But, of course, see if you can find a schottky first.

                            Comment

                            • chrle
                              Senior Member
                              • Sep 2013
                              • 158
                              • slovakia

                              #15
                              Re: GPU PCB Schematics

                              Originally posted by momaka
                              Well, that's not unusual.

                              No worries, though. This is the datasheet:

                              If it doesn't open, search for "SX32", and that should pop some good results.

                              It's a 3A SMD schottky diode rated for 20V reverse voltage and an average forward voltage drop of 0.5V. So just see if those parts stores carry any 3A schottky diodes - they don't have to be SMD. You can certainly use an axial diode too - the fix will just look a bit more ugly, but who cares.

                              Worst case, buy a 6A fast recovery diode/rectifier and use that. Why 6A? Because fast recovery diodes have a higher forward voltage drop (usually around 1V minimum), so it will be dissipating much more heat. Something like SPR600 will probably work. Actually even a 3A diode might work... like HER301-HER303, or MUR405, or PR3001-PR3007 <- all of these should be easily found as they are common diodes. But, of course, see if you can find a schottky first.
                              thank you,momaka,I ordered schottky diode 3A 20V,I will post here when it arrives.

                              Comment

                              • Suoh
                                New Member
                                • Apr 2017
                                • 1
                                • Lithuania

                                #16
                                Re: GPU PCB Schematics

                                Good afternoon. I own FX-795-TDJC v3.0 . The problem I am facing is that a few components are missing. To be more specific - Q215, R227, Q207 and D202. Is there any schematics or diagrams for this GPU board? Or, if possible , can anyone post the names of those missing components, so it will be easier to find a analog part to put instead of missing one.

                                Comment

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