68kMLA Classic Interface
This is a version of the 68kMLA forums for viewing on your favorite old mac. Visitors on modern platforms may prefer the main site.
| Click here to select a new forum. | | Classic issue | Posted by: imactheknife on 2026-04-25 17:18:11
So grabbed a local classic for fun. Recapped it and cleaned. It was pretty nasty for cap leakage. Now its all recapped and working fine except sound. Checked traces, had to fix a few including a broken trace from y1 to rtc. Still no sound. Removed sound chip and checked everything, put back on and no different. Also, the reset button is non functional so is that tied to audio as well? No start up chime etc. will scroll through the forum for info as well. | Posted by: SpocksBeer on 2026-04-25 19:46:13
Ya, reset goes to pin 7 on UA5 (sound chip) according to the BOMARC schematic. Buzz that out to see if you have continuity. If you do, see if you can see the Reset out of pin 6 when reset is pressed. If it does, the sound chip may be fine, if it doesn't, good chance it's just dead. | Posted by: imactheknife on 2026-04-26 14:58:14
Ya, reset goes to pin 7 on UA5 (sound chip) according to the BOMARC schematic. Buzz that out to see if you have continuity. If you do, see if you can see the Reset out of pin 6 when reset is pressed. If it does, the sound chip may be fine, if it doesn't, good chance it's just dead. Well, found a broken trace i thought was fixed but no, was still broken lol.. so now all works good🙂 | Posted by: SpocksBeer on 2026-04-26 17:39:44
Nice one 🙂 | | 1 |
|