SE/30 sound issues: Installed 3rd party ROM in SE/30; sound gone, only static — #10

Post #10 by roj_matt

Source Forum	SE/30 sound issues: Installed 3rd party ROM in SE/30; sound gone, only static — #10
Category	Troubleshooting
Post Date	Wed, 14 Oct 2015 - 05:29
Original URL	https://68kmla.org/bb/threads/se-30-sound-issues-installed-3rd-party-rom-in-se-30-sound-gone-only-static.2808/

Post

techknight said:
broken data line to ASC. Common problem. Sometimes you get a direct break at the ASC, But 99% of the time, the break occurs between the 8530 and 53C80 SCSI/SCC.

The result is crappy to no sound, and majority of OS freezes/crashes with address error.

Thanks, techknight! Pardon my ignorance, though it was easy enough to identify the 8530 and the 53C80, I'm not sure which chip is the ASC. What is the location of that chip (as printed on the board)? I can track down some schematics and test continuity between the chips (in fact, if anyone has a link to a good copy of the schematics, that would be fantastic). I haven't experienced any freezes, crashes or address errors. As I mentioned previously, aside from the sound, everything seems to work perfectly.