Konami Lethal Enforcers Audio Fix 054986A! Schematic included!
This is my first arcade board fix and I felt proud so I thought I'd post it!
My audio was the stereo-typical muffled sound, low audio and no audio completely! After a few hours and a lot of patience, the fix worked! The first things is to get the black coating off the board which is time consuming. I started with rubbing alcohol and an old toothbrush. From there, I used Carburetor/Brake Parts Cleaner and Lacquer-thinner which I dipped the toothbrush in brushed vigorously the coating off. Only parts of the coating came off which was around the base of the capacitors, oddly enough. The rest I used a razor blade and two sizes of flat head screwdrivers to scrap the rest off. Once exposed, the soldiering iron would not melt the factor solider very well. I used a pair of needle-nose pliers to basically rip the existing capacitors off, cleaned off the remaining black coating then prepped it for re-solider. I began to re-solider capacitors in place trying to avoid the existing traces on the PCB board all together if possible to ensure there would be no breaks in the connections. I've created a schematic for this chip 054986A which should answer most if not, all questions.
But! If you do have questions, let me know! Not too bad for the first post, eh?





This is my first arcade board fix and I felt proud so I thought I'd post it!
My audio was the stereo-typical muffled sound, low audio and no audio completely! After a few hours and a lot of patience, the fix worked! The first things is to get the black coating off the board which is time consuming. I started with rubbing alcohol and an old toothbrush. From there, I used Carburetor/Brake Parts Cleaner and Lacquer-thinner which I dipped the toothbrush in brushed vigorously the coating off. Only parts of the coating came off which was around the base of the capacitors, oddly enough. The rest I used a razor blade and two sizes of flat head screwdrivers to scrap the rest off. Once exposed, the soldiering iron would not melt the factor solider very well. I used a pair of needle-nose pliers to basically rip the existing capacitors off, cleaned off the remaining black coating then prepped it for re-solider. I began to re-solider capacitors in place trying to avoid the existing traces on the PCB board all together if possible to ensure there would be no breaks in the connections. I've created a schematic for this chip 054986A which should answer most if not, all questions.
But! If you do have questions, let me know! Not too bad for the first post, eh?





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