Good news and bad news!
I've been working on a Gottlieb Volcano (1980) for 9 months and I got there! First resto. Loving it. Here's a vid of it a few weeks ago, going great.
https://photos.app.goo.gl/QjkdWt1rB1eTtqC47
So I *was* delighted with my work! But of course, that was hubris...
The machine is a European "sound only" one. In the video above, you can hear all the scoring sounds. Sadly, these have stopped! Replaced by a new sound! It seems like a "background" sound that isn't in the video above. It's like lava flowing. Really cool.
There are 3 problems with this development though:
1. It's the only sound now!
2. It only plays for the first ball, of the first game after boot up
3. It stops as soon as any scoring hit is made on the playfield!
Here's what I mean:
https://photos.app.goo.gl/1p2g9fJgXwjGyN6L9
So I've trawled all the System 80 sound posts and tried:
- Recapping the sound board
- Checking continuity between the connections on the sound board and where they meet the driver board (all good)
It didn't get worse, but it didn't get better! So I'm a bit stuck now.
Any and all ideas are welcome or alternatively, just marvel at the quirks of the Sys 80. The gift to hobbyists that never stops giving!