Specifications

Power Supply: 21.5-inch Power Supply: 27-inch
Only qualified technicians may perform repairs on the iMac (21.5-inch, Late 2012) and iMac (27-inch, Late 2012).
Technician Qualification Process
1. Complete this course.
2. Take the iMac (Late 2012) service qualification exam.
Note: You must score 90% or higher in the Technician Safety section of the exam to pass. If you score lower than 90% in this
section, you will fail the whole exam regardless of your performance in other sections.
For more information about the iMac (Late 2012) service qualification exam, please refer to GSX.
Electric Shock Precautions
High Voltage Warning
Never remove or install any physical components while the computer is plugged in to an electrical outlet.
When plugged in, the power supply and logic board are energized, even when the computer is powered off.
Unplug computer and, when possible, allow sufficient time for the power supply and logic board to self-discharge before
removing display panel.
DO NOT touch the logic board or power supply while the computer is plugged in, or before sufficient time has passed to
discharge stored voltage to a safe level after being unplugged.
Wait 2 minutes for self-discharge
After unplugging the computer from the electrical outlet, wait two minutes before removing display panel, disconnecting modules
or substituting cables and components.
This will allow the power supply and logic board time to discharge.
Power Supply and Logic Board Locations