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  • Help identifying PCB

    Hi guys

    I purchased this board a few years from ebay, it was advertised as a street fighter 2 board if i remember correctly and was untested so had no idea if it was working enough. I picked it up for 20 bucks in postage so i wasn't to fussed if it worked or not. Anyway not having a working jamma cabinet for a couple of years I was unable to test it. I have just recently got my jamma cab working so i was able to test the board. As i suspected the board has a problem where it just shows up a red box. Having now seen pictures of street fighter boards i am fairly confident this is not a street fighter board.

    I would like to make an attempt to repair this board but I have no idea what board it is so im stuck on where to start. I was wondering if any of the nice people at AA could identify this board?

    If you need more pics i can attach some more, just tell me what you need.

    Regards
    Matt
    Attached Files

  • #2
    Am on a very small screen here but it looks very boot leggy to me, so it could well be SF2 and not look like anything you find online. Best bet is to dump and compare the roms.
    Sic transit gloria Atari!

    Comment


    • #3
      Looks like Jamma

      Check your power entry pins, and if same as Jamma Fire it up and see

      ...............
      Sorry, I read your post properly

      This may be more helpful, I found a few this way - visually

      http://www.crazykong.com/pcbs/
      Last edited by dezbaz; 17th September 2009, 09:04 PM. Reason: Auto Merged Double Post.
      Regards

      Dez

      DSB Electrical
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      Comment


      • #4
        Yeah I have had a look at crazykong.com and could not find anything that looked the same.

        I have not the knowledge nor the equipment to dump the roms and compare. Is this a straight forward process? Is there a website that shows how to do this.

        When I plug this in it just comes up with a red screen. Any ideas what could be causing this? easy fix maybe or should i just cut my losses (20 bucks no big deal)?

        Cheers
        Matt

        Comment


        • #5
          Hi Matt

          It could be worse, red screen is better than black screen.

          A video rom may be gone. Check your voltages (using this diagram)

          So is there any sound? Looks like there is a sound amp fitted to the board (1st pic top LHS)

          Try turning the volume all the way up , then opposite direction and listen for sounds to try an identify the board, while it first starts.

          If you have a logic probe you can see if there is anything happenning on the other video pins (On the Jamma Harness), ie the logic probes led will blink or flash on green or blue pin if there is any action. I suspect there wont be as the circuit before that may have failed, IE a rom Or some RAM is U/S

          Dumping ROMS is done using a eprom Burner using software on your PC. A few guys on the forum can do it. Depends how much this board means to you


          Could be a tough board to start on. Maybe buy a board with lesser probs, and move up from there. Pacman is the easiest board to start on, as there is 100's of sites with info on fixing them


          Good luck, keep trying if you want.

          My first post here was trying to get a qBert Bootleg's Sound Working. I had no idea, and kept trying and now it works. I learnt a hell of a lot

          I have posted threads to get pacmans working and River Patrols too.

          The guys here are great
          Last edited by dezbaz; 18th September 2009, 08:54 PM.
          Regards

          Dez

          DSB Electrical
          DSB Electrical Facebook
          VAPS
          Vector Monitor Repro Parts
          Amazing Arcading Facebook Page

          Another AA Visitor. Stay a while, stay FOREVER!

          Comment


          • #6
            Thanks for the info DezBaz.

            I have not tried the sound yet as i have not hooked up the speaker in my cabinet (It is still a work in progress). The board doesn't mean that much to me as i only paid 20 bucks for it. I have brought it into work and had a bit of a look at it. I have found a few dry solder joints and some of the electrolytics look a little bit bulging so i have replaced them. I will see how that goes tonight, if there is no change i will prob just shelve it and move on. I have a logic probe so i may get back to it some day but i don't think i will need to trouble any one to dump the roms.

            Cheers for the info again, i am interested in repairing a few boards and i think i will take your advice and start with a pacman or something with a little more info about it.

            Cheers
            Matt

            Comment


            • #7
              Good 1!

              Threads like this are good to motivate others too (Like me )

              LOL

              Hope to see you round
              Regards

              Dez

              DSB Electrical
              DSB Electrical Facebook
              VAPS
              Vector Monitor Repro Parts
              Amazing Arcading Facebook Page

              Another AA Visitor. Stay a while, stay FOREVER!

              Comment


              • #8
                Ok so have had a bit of success with replacing the caps and touching up a few solder joints. The board is a Street Fighter 2 World Warrior as it now boots up. I guess like Womble said, it is a bootleg board.

                There is still some graphical problems with it though, it has a red colouring to it and some of the grpaphics jump around a bit and have lines on through them. I will try and get some photos of it over the weekend to show you guys what is happening.

                Any ideas on the red colouring through everything?

                Regards
                Matt

                Comment


                • #9
                  Originally posted by lancebung View Post
                  Ok so have had a bit of success with replacing the caps and touching up a few solder joints. The board is a Street Fighter 2 World Warrior as it now boots up. I guess like Womble said, it is a bootleg board.

                  There is still some graphical problems with it though, it has a red colouring to it and some of the grpaphics jump around a bit and have lines on through them. I will try and get some photos of it over the weekend to show you guys what is happening.

                  Any ideas on the red colouring through everything?

                  Regards
                  Matt
                  Nice work, might have to wait for the pics to go from here

                  Are most of the ICs socketed BTW?
                  Regards

                  Dez

                  DSB Electrical
                  DSB Electrical Facebook
                  VAPS
                  Vector Monitor Repro Parts
                  Amazing Arcading Facebook Page

                  Another AA Visitor. Stay a while, stay FOREVER!

                  Comment


                  • #10
                    The red colouring is probably caused by the loss of either green or blue signals, everything will look odd and red may be predominant now. Lines thru, and jumpy gfx can be bad roms or good roms in bad sockets. Removing and reseating all socketted roms can chase away many gremlins. Where in oz are you? Can give you a hand if you happen to be in melbourne.
                    Sic transit gloria Atari!

                    Comment


                    • #11
                      I am located in Darwin so I am about as far away from Melb as you can get which is a bit of a shame lol. I will reseat the roms and see how that goes tomorrow. I will also take some pics as well.

                      Most of the IC's are soldered straight onto the board, there are only a few that are socketed (like 2 or 3 max other than the game roms).

                      Thanks for the advice, more info coming tomorrow

                      Cheers
                      Matt

                      Comment


                      • #12
                        Originally posted by lancebung View Post
                        I am located in Darwin so I am about as far away from Melb as you can get which is a bit of a shame lol. I will reseat the roms and see how that goes tomorrow. I will also take some pics as well.

                        Most of the IC's are soldered straight onto the board, there are only a few that are socketed (like 2 or 3 max other than the game roms).

                        Thanks for the advice, more info coming tomorrow

                        Cheers
                        Matt
                        They are socketed as they have been replaced (probably) - IE a good practice

                        I look forward to pics
                        Regards

                        Dez

                        DSB Electrical
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                        VAPS
                        Vector Monitor Repro Parts
                        Amazing Arcading Facebook Page

                        Another AA Visitor. Stay a while, stay FOREVER!

                        Comment


                        • #13
                          Ok I have taken a few photos which show some of the graphics problems. The whole screen has a red overlay as previously stated, but you can also see some of the blocky bits that show up in random places. There is also a problem where the horizontal alignment is out. It is all aligned when I load up other games so I think that is part of the problem and not just in need of adjustment.

                          Hope you can get more of an idea what is going on from the pics. I also have not reseated the roms so I don't know if some of this is due to badly seated roms

                          Regards
                          Matt
                          Attached Files

                          Comment


                          • #14
                            Looks like green is playing up, some blue is present


                            Have you tried another PCB in the cab, to test the monitor? (I can't remember if you tried that)
                            Regards

                            Dez

                            DSB Electrical
                            DSB Electrical Facebook
                            VAPS
                            Vector Monitor Repro Parts
                            Amazing Arcading Facebook Page

                            Another AA Visitor. Stay a while, stay FOREVER!

                            Comment


                            • #15
                              Yeah my 2 other games (SSF2 and SFZ3) both work perfectly. Sometimes it will start up and the picture will be aligned well and then it will go bad again. It always has a red look to it though.

                              Since my last post I have re-socketed the roms and it made no difference.

                              Matt

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