An infamous mistake has been discovered in the Apple Macintosh LC III, with a capacitor installed backwards causing potential issues. The error involves capacitor C22 being oriented incorrectly, resulting in a negative voltage across the capacitor when the system is powered on. The controversy lies in Apple’s failure to recall or address this issue, despite the clear mistake shown in the circuit. This error, overlooked by many recapping guides, poses a risk when using tantalum capacitors as replacements. The necessity to correct the capacitor orientation for safety and proper functionality is emphasized, urging caution and awareness among those working on these machines.
https://www.downtowndougbrown.com/2024/11/the-capacitor-that-apple-soldered-incorrectly-at-the-factory/