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capacitor_relacement [2026/06/24 04:09] – created wthwwcapacitor_relacement [2026/06/24 06:55] (current) – [Macintosh LC III, Performa 450 (820-0650-A)] Phipli
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 Promptly purchase a set of replacement capacitors, preferably in "tantalum" form.  These are solid and will not ever leak. Promptly purchase a set of replacement capacitors, preferably in "tantalum" form.  These are solid and will not ever leak.
  
-==== Remove The Old Capacitors ====+==== Remove the Old Capacitors ====
  
 While every Mac is different, take a moment to read through the basic instructions quoted below. While every Mac is different, take a moment to read through the basic instructions quoted below.
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 </WRAP> </WRAP>
  
-==== Clean The Board ====+==== Clean the Board ====
  
 Before soldering on your new caps, be very sure to thoroughly clean the board.  Many people have put the logic board into the dishwasher and run it without detergent.  This seems to work particularly well.  Taking it to the sink or tub of water with a toothbrush has also proven to be a good way to do it.  Several days later, when the logic board is thoroughly dry, it's time to solder on your new capacitors. Before soldering on your new caps, be very sure to thoroughly clean the board.  Many people have put the logic board into the dishwasher and run it without detergent.  This seems to work particularly well.  Taking it to the sink or tub of water with a toothbrush has also proven to be a good way to do it.  Several days later, when the logic board is thoroughly dry, it's time to solder on your new capacitors.
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 Again, practice on garbage boards if you are unsure of yourself.  When soldering new caps back on, pay special attention to the polarity of the capacitor and the markings on the logic board.  Often there will be a positive (+) symbol printed on the board.  The side of the tantalum capacitor that has a stripe is positive (+), so face that side of the capacitor toward the (+) symbol.  With surface-mount tantalums, it helps to apply some solder to both sides of the new capacitor first.  Then line the cap up on your logic board and simply heat both sides to make a connection. Again, practice on garbage boards if you are unsure of yourself.  When soldering new caps back on, pay special attention to the polarity of the capacitor and the markings on the logic board.  Often there will be a positive (+) symbol printed on the board.  The side of the tantalum capacitor that has a stripe is positive (+), so face that side of the capacitor toward the (+) symbol.  With surface-mount tantalums, it helps to apply some solder to both sides of the new capacitor first.  Then line the cap up on your logic board and simply heat both sides to make a connection.
  
-===== Capacitor Quantity and Type, for Macintosh Models =====+===== Capacitor Quantity and Type for Macintosh Models =====
  
 Some logic board revisions may have a different number of capacitors, so make sure to look first and verify this information.  If yours is different, please create an account here and add it to the page by clicking the edit button up on top.  Note that these numbers include capacitors only on the logic board and not, for example, in the power supply.  Post on the [[http://68kmla.net/bb|68kMLA Forums]] if you suspect you have bad caps in your power supply and would like help. Some logic board revisions may have a different number of capacitors, so make sure to look first and verify this information.  If yours is different, please create an account here and add it to the page by clicking the edit button up on top.  Note that these numbers include capacitors only on the logic board and not, for example, in the power supply.  Post on the [[http://68kmla.net/bb|68kMLA Forums]] if you suspect you have bad caps in your power supply and would like help.
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 Replace with Tantalum: Replace with Tantalum:
-*10x 47µF (16V) - C1, C3, C4, C5, C7, C8, C9, C10, C12, C13 +  * 10x 47µF (16V) - C1, C3, C4, C5, C7, C8, C9, C10, C12, C13 
-*1x 1µF (50V) - C6+  * 1x 1µF (50V) - C6
  
 Replace with Axial Electrolytic: Replace with Axial Electrolytic:
-*1x 220µF (16V) - C11 +  * 1x 220µF (16V) - C11 
-*1x 470µF (16V) - C2+  * 1x 470µF (16V) - C2
  
 Gallery: Gallery:
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 Replace with Tantalum: Replace with Tantalum:
-*8x 47µF (16V) +  * 8x 47µF (16V) 
-*2x 10µF (16V)+  * 2x 10µF (16V)
  
 Replace with Electrolytic: Replace with Electrolytic:
-*3x 470µF (16V) +  * 3x 470µF (16V) 
-*1x 220µF (16V)+  * 1x 220µF (16V)
  
 ==== Macintosh IIci (another revision) ==== ==== Macintosh IIci (another revision) ====
  
 Replace with Tantalum: Replace with Tantalum:
-*11x 47µF (?V) +  * 11x 47µF (25V) 
-*2x 10µF (?V)+  * 2x 10µF (16V)
  
 Replace with Electrolytic: Replace with Electrolytic:
-*3x 470µF (?V) +  * 3x 470µF (16V) 
-*1x 220µF (?V)+  * 1x 220µF (16V)
  
 ==== Macintosh IIsi (820-0301-A) ==== ==== Macintosh IIsi (820-0301-A) ====
 +
 Replace with Tantalum: Replace with Tantalum:
-*11x 47µF (16V)+  * 11x 47µF (16V)
 Replace with Axial Electrolytic: Replace with Axial Electrolytic:
-*2x 220µF (16V)+  * 2x 220µF (16V)
  
 ==== Macintosh Classic II, Performa 200 ==== ==== Macintosh Classic II, Performa 200 ====
  
 Replace with Tantalum: Replace with Tantalum:
-*3x 47µF (16V) +  * 3x 47µF (16V) 
-*2x 1µF (50V) +  * 2x 1µF (50V) 
-*8 to 11x 10µF (16V)+  * 8 to 11x 10µF (16V)
  
 ==== Macintosh Color Classic ==== ==== Macintosh Color Classic ====
  
 Replace with Tantalum: Replace with Tantalum:
-*6x 47µF (16V) +  * 6x 47µF (16V) 
-*2x 100µF (6.3V) +  * 2x 100µF (6.3V) 
-*1x 10µF (16V)+  * 1x 10µF (16V)
  
 ==== Macintosh LC (630-0309-) ==== ==== Macintosh LC (630-0309-) ====
  
 Replace with Tantalum: Replace with Tantalum:
-*5x 47µF (16V) +  * 5x 47µF (16V) 
-*1x 1µF (50V) +  * 1x 1µF (50V) 
-*1x 100µF (6.3V) +  * 1x 100µF (6.3V) 
-*8x 10µF (16V)+  * 8x 10µF (16V)
  
 ==== Macintosh Performa 400, LC II (820-0327-A) ==== ==== Macintosh Performa 400, LC II (820-0327-A) ====
  
 Replace with Tantalum: Replace with Tantalum:
-*5x 47µF (16V) +  * 5x 47µF (16V) 
-*1x 1µF (50V) +  * 1x 1µF (50V) 
-*1x 100µF (6V) +  * 1x 100µF (6V) 
-*10x 10µF (16V)+  * 10x 10µF (16V)
  
 ==== Macintosh LC III, Performa 450 (820-0650-B, Rev. D) ==== ==== 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: Replace with Tantalum:
-*5x 47µF (16V) +  * 5x 47µF (25V) 
-*5x 10µF (16V) +  * 5x 10µF (16V) 
-*1x 100µF (6.3V)+  * 1x 100µF (6.3V)
  
 ==== Macintosh LC III, Performa 450 (820-0650-A) ==== ==== Macintosh LC III, Performa 450 (820-0650-A) ====
 Replace with Tantalum: Replace with Tantalum:
-*5x 47µF (16V) - C8, C19, C20, C21, C22 +  * 4x 47µF (16V) - C8, C19, C20, C22 
-*5x 10µF (16V) - C2, C4, C5, C7, C18 +  * 1x 47µF (25V) - C21 
-*1x 100uF (6V) - C13+  * 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.
  
 Gallery: Gallery:
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 ==== Macintosh Quadra 605, Performa 475, LC 475 (820-0364-A) ==== ==== Macintosh Quadra 605, Performa 475, LC 475 (820-0364-A) ====
 Replace with Tantalum: Replace with Tantalum:
-*9x 47µF (16V) +  * 9x 47µF (16V) 
-*2x 100µF (6.3V)+  * 2x 100µF (6.3V)
  
 ==== Macintosh Portable (820-0219-A) ==== ==== Macintosh Portable (820-0219-A) ====
 Replace with Tantalum: Replace with Tantalum:
-*4x 1µF (50V) - C4, C5, C15, C24 +  * 4x 1µF (50V) - C4, C5, C15, C24 
-*9x 47µF (16V) - C9, C10, C11, C17, C22, C25, C26, C27, C28 +  * 9x 47µF (16V) - C9, C10, C11, C17, C22, C25, C26, C27, C28 
-*2x 10µF (16V) - C14, C116+  * 2x 10µF (16V) - C14, C116 
 Replace with Radial Lead Electrolytic: Replace with Radial Lead Electrolytic:
-*4x 100µF (25V) - C2, C6, C18, C19 +  * 4x 100µF (25V) - C2, C6, C18, C19 
-*1x 220µF (25V) - C3+  * 1x 220µF (25V) - C3 
 Replace with Axial Lead Electrolytic: Replace with Axial Lead Electrolytic:
-*3x 470µF (25V) - C8, C16, C20+  * 3x 470µF (25V) - C8, C16, C20
  
 Gallery: Gallery:
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 ==== Macintosh Quadra 840AV (820-0382-10) ==== ==== Macintosh Quadra 840AV (820-0382-10) ====
 Replace with Tantalum: Replace with Tantalum:
-*2x 10µF (16V) - C1, C35 +  * 2x 10µF (16V) - C1, C35 
-*13x 47µF (16V) - C2, C27, C48, C53, C56, C59, C60, C62, C63, C64, C69, C75, C76+  * 13x 47µF (16V) - C2, C27, C48, C53, C56, C59, C60, C62, C63, C64, C69, C75, C76
  
 Gallery: Gallery:
capacitor_relacement.1782274171.txt.gz · Last modified: by wthww