cr4zymanz0r
Member
X-Men no sound, then cap replacement, now sound + static
So, I took a gamble and bought a 4 player X-Men PCB that was known to not have sound. The sound board had not been tampered with, so I cleaned off the paint with q-tips and rubbing alcohol. Some traces definitely looked corroded.
I removed all the old caps, cleaned everything up the best I could, tested all the traces on top with a multimeter and found around 9 traces that did not have a connection. I got some new caps (non-surface mount for easier installation), repaired the traces, then tested all the connections on the top of a chip with a multimeter. Everything seemed good at that point.
Next I went to test and at first the static was so loud that I couldn't hear any of the game sounds, but after a minute or so nearly all of the static was gone, then after a couple of more minutes came back, but the game sounds were still audible at this point. I poked around at the chip and capacitors with a toothpick while it was running, but that diddn't really seem to change the behavior.
Here's a video I recorded so you can hear for yourself https://www.youtube.com/watch?v=hlDp3euolX4
It sounds more annoying in person than it does in the video.
I know sound issues with these boards are common, but it seems like the main remedy is replacing the leaking caps. Has anybody experienced these static/popping issues after a cap replacement? i'm hoping someone can help pinpoint me to a point of interest such as "oh, that definitely sounds like a loosely connected trace" or "yep, the ____ component is to blame when it sounds like that".
So, I took a gamble and bought a 4 player X-Men PCB that was known to not have sound. The sound board had not been tampered with, so I cleaned off the paint with q-tips and rubbing alcohol. Some traces definitely looked corroded.
I removed all the old caps, cleaned everything up the best I could, tested all the traces on top with a multimeter and found around 9 traces that did not have a connection. I got some new caps (non-surface mount for easier installation), repaired the traces, then tested all the connections on the top of a chip with a multimeter. Everything seemed good at that point.
Next I went to test and at first the static was so loud that I couldn't hear any of the game sounds, but after a minute or so nearly all of the static was gone, then after a couple of more minutes came back, but the game sounds were still audible at this point. I poked around at the chip and capacitors with a toothpick while it was running, but that diddn't really seem to change the behavior.
Here's a video I recorded so you can hear for yourself https://www.youtube.com/watch?v=hlDp3euolX4
It sounds more annoying in person than it does in the video.
I know sound issues with these boards are common, but it seems like the main remedy is replacing the leaking caps. Has anybody experienced these static/popping issues after a cap replacement? i'm hoping someone can help pinpoint me to a point of interest such as "oh, that definitely sounds like a loosely connected trace" or "yep, the ____ component is to blame when it sounds like that".