MacBook Air Service Manual - Components in the MacBook Air are smaller and more integrated than many other Macintosh portables; thus, a watchmaker’s finesse is crucial when handling repairs. Likewise, the MacBook Air’s new system architecture requires troubleshooting methodology specific to its design. Because there are fewer parts, repair can seem deceivingly simple. Pay close attention to warnings and cautions throughout the procedures in this manual to avoid repair issues. MacBook Air SuperDrive – An external USB slot-loading SuperDrive, solely bus-powered, works only with MacBook Air and must be connected directly to a powered USB port on the computer itself or on an Apple LED Cinema Display. It will not function through any other hub. USB Ethernet Adapter – Allows connection to an Ethernet network. The USB Ethernet Adapter was sold separately for the original and Late 2008 models, but was included with the Mid 2009 model. The adapter looks similar to the Apple USB modem. You can differentiate between them by inspecting the ports: the USB Ethernet Adapter uses an RJ-45 connector with eight contacts, and the USB Modem uses an RJ-11 connector with two contacts.
Following is a quick tour of major features and important repair steps when servicing a MacBook Air. Please see the specific repair sections to obtain full details on servicing that part. Before resting the unit on the workbench, make sure the work area is clear of all debris and contaminants to avoid damaging the display housing. The system serial number is etched into the bottom case (shown below). It is centered just below the regulatory markings. See the bottom case section for information on serial number transfer. The bottom case screws are inserted at an angle. When reinstalling these screws make sure you have inserted them at that appropriate angle. Before turning the screw into the boss, make sure the threads are properly aligned. Use the screwdriver to seat the screw at the correct angle, and then turn the screw backward (counterclockwise) until you feel the threads “click” into place. Otherwise, you can damage the screw boss which is part of the top case.
The MacBook Air contains an internal-only battery that is not accessible from the exterior and is serviceable by authorized Apple service providers only. Unlike previous systems, when you remove the bottom case, power is still available to the logic board. Before any further work, disconnect the battery from the logic board connector. Because the battery is internal and connected to the logic board via cable, it MUST BE DISCONNECTED before performing service procedures. If you fail to do so, live current from the battery will short circuit the components and render the logic board and/or LVDS cable unusable. Many cables and cable connectors are very delicate and require specific removal procedures. Also, new, environmentally friendly Halogen-free materials tend to be stiffer and less pliable, and thus require careful handling to avoid damage. The sleep sensor is located to the left of the sleep indicator light. Like the MacBook Pro, the magnet is in the display assembly, but since this system is so thin, it is possible to trigger the sleep sensor with external magnets. For example, when you stack a MacBook Air one on another, the sleep magnet in the bottom system’s display assembly will trigger the sleep sensor on top.
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