| Arcade Collecting > Restorations & repair |
| Double Dragon preservation & conversion |
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| smalltownguy:
Well, I was able to jumper most of what I could tell (or at least, what the multi meter could tell me) needed it, and now I can get the board to boot. It's still unstable, though, freezing often, rebooting at various intervals, and barely accepting inputs. I think I may have missed a jumper connection somewhere. But at least I'm getting closer..... Oh where oh where have the schematics gone, oh where oh where could they be....... :banghead: :banghead: :banghead: :banghead: :banghead: |
| RayB:
There might not be any schematics for it. The big name manufacturers included them with their games in the early 80's but that practice came to an end as they got more and more protective of their hardware (blame the bootleggers!) |
| smalltownguy:
http://www.mameworld.info/ubbthreads/showthreaded.php?Cat=&Board=news&Number=192822&Forum=All_Forums&Words=double%20dragon%20schematic&Match=Entire%20Phrase&Searchpage=0&Limit=25&Old=allposts&Main=192822&Search=true#Post192822 According to that link & thread, they DO exist. Now it's just a matter of convincing someone to 'give up the goods' so to speak. :'( |
| HaRuMaN:
Does that board have any socketed chips? You can try removing them (GENTLY!) and cleaning the legs, then reseating them in the sockets. Sometimes helps. |
| smalltownguy:
Yeah, there's close to 2 dozen socketed chips on that board. I've removed and reseated them once, but I have not cleaned the legs. The sockets are double sided sweeps, so I should be making good contact. Since I continue to make progress by tracking down and repairing broken traces, I'm going to continue down that road to see how far it takes me. If I hit a road block, then I'll try cleaning the legs better. In the mean time, I'm fairly confident that the chips are making good contact. Because I'm still seeing intermittent behavior, I'm inclined to believe that the issue lies in a trace somewhere that is not 100% clear. The increased resistance due to a somewhat broken path could be what is causing the issue. I'm holding out for a few more days until I can get my hands on the PCB schematics. |
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