Differences

This shows you the differences between two versions of the page.

--- capacitor_relacement [2026/06/24 06:32] – [Macintosh IIci (another revision)] Phipli
+++ capacitor_relacement [2026/06/24 06:55] (current) – [Macintosh LC III, Performa 450 (820-0650-A)] Phipli
@@ Line 82: / Line 82: @@
 Replace with Electrolytic:
-  * 3x 470µF (?V)
+  * 3x 470µF (16V)
-  * 1x 220µF (?V)
+  * 1x 220µF (16V)
 ==== Macintosh IIsi (820-0301-A) ====
@@ Line 123: / Line 123: @@
 ==== Macintosh LC III, Performa 450 (820-0650-B, Rev. D) ====
+**Warning!**
+The -5v Rail Capacitor on the LC III is labelled incorrectly on the silk screen and usually / always installed backwards from factory. While this wasn't ideal with a conventional electrolytic, when installing tantalum capacitors this can result in sudden and violent failure.
+**Prior to installing capacitor C22, use continuity testing on a multimeter to confirm the orientation.** As this is a negative power rail, the side with continuity to ground is the +ve side of the capacitor (i.e. the side marked with a band on a tantalum capacitor).
+See : [[https://68kmla.org/bb/threads/lciii-recap-apple-design-fault-47uf-reversed.27834/|https://68kmla.org/bb/threads/lciii-recap-apple-design-fault-47uf-reversed.27834/]]
 Replace with Tantalum:
-  * 5x 47µF (16V)
+  * 5x 47µF (25V)
   * 5x 10µF (16V)
   * 1x 100µF (6.3V)
@@ Line 131: / Line 138: @@
 ==== Macintosh LC III, Performa 450 (820-0650-A) ====
 Replace with Tantalum:
-  * 5x 47µF (16V) - C8, C19, C20, C21, C22
+  * 4x 47µF (16V) - C8, C19, C20, C22
+  * 1x 47µF (25V) - C21
   * 5x 10µF (16V) - C2, C4, C5, C7, C18
   * 1x 100uF (6V) - C13
+Alternatively, it is acceptable to use 25V parts for all 47µF here to avoid ordering multiple different items.
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