Skip to main content

Model A1311 / Mid 2010 / 3.06 & 3.2 GHz Core i3 or 3.6 GHz Core i5 Processor

342 Questions View all

How can I test the Power Supply (voltage values)?

I have an iMac (Model A1311, EMC: 2389) that won't power up properly. I want to test the power supply but cannot find the output voltage values anywhere on the internet.

I would be happy to post a 'technique' article showing people how to access and test the power supply in this model if someone can help me determine their proper output values.

Answered! View the answer I have this problem too

Is this a good question?

Score 18

Bless you, bless you, bless you both! The link led to a trove of excellent technical material and the diagram you posted is very clear. Thanks! I WILL post a technique article on testing this PSU so that others following in my footsteps will have an easier time.

Thanks again, and may the Valar watch over you! - Valdaquendë


That would be fantastic and help a lot of others!


Add a comment

2 Answers

Chosen Solution

This PDF should give you the pin out: Apple Technician Guide for iMac (21.5-inch, Mid ... -

Was this answer helpful?

Score 13


Thanks again for that link, mayer; it's probably the biggest, most comprehensive archive of manuals for Apple devices I've ever seen! Apple devices cross my workbench with some frequency but it's been varying degrees of hard to find the manuals needed to work on them.

I should add that the site contains manuals for thousands of other laptop models by many different manufacturers; anyone reading this who has a frequent need for this sort of material will find the site a wonderful trove of information. Thanks again!


This PDF works to iMac 21,5" Mid 2011 (EMC: 2428)?


I don't understand the down vote on this.


@mattgordon see above request for explanation of down vote


Show 5 more comments

Add a comment

Valdaquende, just in case you miss mayer's link

Block Image

Was this answer helpful?

Score 10


Thanks! This pinout was just what I needed. I accepted mayer's answer because it contained the info I needed and TONS of additional information but I wish I could have split the answer between the two of you; both answers were very helpful. Thanks again!


Valdaquende, that is the proper choice. mayer did answer the question appropriately and I just wanted to augment his answer. Well done.;-)


Add a comment

Add your answer

Valdaquende will be eternally grateful.
View Statistics:

Past 24 Hours: 2

Past 7 Days: 22

Past 30 Days: 79

All Time: 31,364