Specifications

Take Apart Tips
Review the Electric Shock and Glass Safety precautions found in the beginning of this course.
Follow all cleaning and handling instructions to prevent damaging display panel or LCD panel.
Never place display panel onto a work surface where it may collect dust and other contaminants. Always place it into a protective
microfoam bag.
The chin strap must be removed for the majority of repairs. If a component reaches below the chin, the chinstrap must be
removed before that component can be removed.
Handling the logic board incorrectly could flex the board and damage chips and circuits. Always handle the logic board by its
edges. Never handle the board by heat sink.
When replacing logic board or rear housing, plug in one USB cable and two Thunderbolt cables while tightening screws.
Do not attempt to remove the wireless card without taking out the logic board.
Fusion Drive
Fusion Drive is a breakthrough storage option that combines the high storage capacity of a traditional hard drive and the high performance of flash
based storage (module or solid-state drive).
A traditional hard drive and flash storage are fused together via Core Storage in OS X so you see one single volume.
Fusion Drive automatically and dynamically moves frequently used files to flash for quicker access. It makes disk-intensive tasks faster and more
efficient. A Fusion Drive allows the iMac to boot up to 2x faster and import photos up to 3.6x faster.
Fusion Drive Availability
Fusion Drive is an Apple Online Store configurable option.
iMac (21.5-inch, Late 2012): 1TB Fusion Drive
iMac (27-inch, Late 2012): 1TB or 3TB Fusion Drive
More Information
Fusion Drive service training course (found in GSX)
Apple Support article HT5446
Display Removal
Reminders
The display panel is not tempered and will break into sharp pieces if mishandled. A scratched or broken glass panel is not
covered under warranty.
Do not use the black stick to pry the display panel. Use only the display removal tool.
Do not place the display panel onto a work surface where it may collect dust and other contaminants unless it has first been
placed into a protective microfoam bag.
Store LCD panel in an anti-static bag to prevent the buildup of static charges which may attract dust particles to the glass