743      iPhone_iPad_Mac_apple

What are those capacitors and their properties?

I have got Apple Mac Pro "Twelve Core" 2.66 (Mid-2012). Couple weeks ago when I was cleaning the logic board I noticed that one of the capacitors were broken. It is interesting that I still can turn on the device. However, I would love still fix it.

I am currently looking for the right capacitor. Can someone tell me what those capacitors are? Please, I have attached couple images. Thanks for your help in advance.

You found the forums for pre-1998 Apple products that gets almost not views. I'm asking the Hosts to move you to the Mac Pro forums.

The third picture shows a capacitor in place. Is this an earlier picture from the same board, or from an absolutely identical board? The marking on top of the capacitor would be of interest (cannot be read here).

These look like electrolytic capacitors. You will find much more on this subject through a web search. Please note that polarity is important. Always make sure that an electrolytic capacitor has a correct working voltage.

In the second picture, the capacitor next to the missing one appears to have a marking 100 and 16. This could indicate 100 µF and 16 V. It is possible that the other capacitor has the same value, but we do not know that. It would be good if someone with exactly this computer/board could provide you with the information needed.

The parts in question appear to be electrolytic capacitors, as Jan says.

So-called because they are little "can" full of electrolyte-soaked layers of plates. It is important to install capacitors of this same type (electrolytic) at least the same capacitance in micro-farads, and at least the same temperature range or higher. The leads should be kept as short as possible, and the polarity MUST be followed, or it can lead to premature failure.

The components you can buy locally may be larger in size. This size matters not at all, as long as you keep the leads short and the body does not collide with anything.

Electrolytic capacitors, especially when not nested right next to a group of components, are used most often to smooth power noise on a DC power supply on a board. The ones you are pointing to may be related to the PCIe slots they are right next to.

Yeah! I think I found it. It is most likely SEPC 16V 100UF. However, there are different types of them available from eBay. For example, here are different ones https://www.ebay.com/itm/like/290923565715?chn=ps&dispItem=1 I do not understand the difference between 234 serc 100uf 16v and 233 sepc 100uf 16, or 921 100uf 16v. I need a right one for mine. If those initial numbers do not matter at all, then I should be fine to put one of them.

最後更新：2017-08-21 11:29:36

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