Timeline for Old Macintosh Power supply chirping
Current License: CC BY-SA 4.0
6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Mar 28, 2021 at 13:57 | comment | added | ISAAC BUCKINGHAM | @kartman all the rails that i have checked are at ~0volts... not excalty that but somewhere around there, nothing above .1 though | |
| Mar 28, 2021 at 6:19 | comment | added | Kartman | If it is a first generation Mac c1984, look at caps C39 and C43. | |
| Mar 28, 2021 at 6:10 | comment | added | Kartman | What mac is it specifically? With electrolytics, they don’t need to be bloated to be faulty. Chirping could be caused by a number of problems. Use a multimeter to measure each of the rails when it is chirping. Whilst they won’t reach their specified voltage they should register something unless the short is on that circuit. | |
| Mar 28, 2021 at 3:51 | comment | added | D.A.S. | No It's an annular ring in a large circular plated thru hole for heavy parts like transformer | |
| Mar 28, 2021 at 3:11 | comment | added | ISAAC BUCKINGHAM | Would reflowing the direct connections help or is this cracks in the traces? | |
| Mar 28, 2021 at 2:33 | history | answered | D.A.S. | CC BY-SA 4.0 |