- Joined
- Jul 12, 2008
- Posts
- 495
I need to some help and advice on how to fix my Cyber-Lip MVS board.
The fault is the sound is completely messed up, I have filmed a video so you can hear it. Some of the sounds appear okay, were as other sounds are messed up.
I don't want do start desoldering chips randomly and comparing the data to MAME, so wanted a bit of a guide to pin point potential faulty chips to target first.
Its an original board as verified on MVS-Scans and as far as I can see, it's not had any repairs previously done to it. (Although an owner in the past has appeared to have used brasso or similar to remove most of the gold coating from the pins.
I have checked continuity between the pins and the via and they are all good. I cannot see any cold solder joints or broken traces, so I imagine it's going to be one the chips.
I did a little bit of research and similar issues point to the custom PCM chip being the cause of the issue, this doesn't appear to have one so it's not that.
The fault is the sound is completely messed up, I have filmed a video so you can hear it. Some of the sounds appear okay, were as other sounds are messed up.
I don't want do start desoldering chips randomly and comparing the data to MAME, so wanted a bit of a guide to pin point potential faulty chips to target first.
Its an original board as verified on MVS-Scans and as far as I can see, it's not had any repairs previously done to it. (Although an owner in the past has appeared to have used brasso or similar to remove most of the gold coating from the pins.
I have checked continuity between the pins and the via and they are all good. I cannot see any cold solder joints or broken traces, so I imagine it's going to be one the chips.
I did a little bit of research and similar issues point to the custom PCM chip being the cause of the issue, this doesn't appear to have one so it's not that.