MaximRecoil
Well-known member
Super Punch-Out: left sound channel stopped working
This is getting ridiculous. The boardset is in good shape physically; no corrosion or anything like that.
The left sound channel, the one which has the music and sound effects for the punches (not the one which has the announcer's voice) stopped working while playing a game. First it only partially stopped working, e.g., I'd throw 4 punches and only hear 3 punch sound effects. But after about 30 seconds, it stopped working altogether, aside from occasionally generating random notes, some of which formed simple tunes I've never heard from that game before.
I guess the first thing to try is replacing the 2A03 CPU, which is the CPU for that sound channel, though I doubt that's the problem. I suspect it is one of those TTL chips; I've half a mind to just replace every TTL chip on the CPU board. Then maybe it can go a year or two without one of them giving up the ghost.
This is getting ridiculous. The boardset is in good shape physically; no corrosion or anything like that.
The left sound channel, the one which has the music and sound effects for the punches (not the one which has the announcer's voice) stopped working while playing a game. First it only partially stopped working, e.g., I'd throw 4 punches and only hear 3 punch sound effects. But after about 30 seconds, it stopped working altogether, aside from occasionally generating random notes, some of which formed simple tunes I've never heard from that game before.
I guess the first thing to try is replacing the 2A03 CPU, which is the CPU for that sound channel, though I doubt that's the problem. I suspect it is one of those TTL chips; I've half a mind to just replace every TTL chip on the CPU board. Then maybe it can go a year or two without one of them giving up the ghost.
Last edited:
37 pm »