User Guide

iMac (Early 2006 20-inch) Take Apart —Power Supply, AC/DC 85
Removing the AC/DC Power Supply
WARNING: The AC/DC power supply PCB remains powered up whenever the system is
plugged in, whether or not the system has been turned on. Use extreme caution when
troubleshooting the system with the front bezel removed.
Don’t work alone. In the event of an electrical shock it is important to have another
individual present who can provide assistance.
Keep one hand in your pocket when working on any iMac (Early 2006) system that is
plugged in. This will help ensure that your body does not provide a path to ground in
the event that you accidentally make contact with the line voltage.
Don’t wear jewelry, watches, necklaces, or other metallic articles that could present a
risk if they accidentally make contact with the power supply circuitry.
Using a torx screwdriver, remove four screws from the AC-DC board. The top left screw also
connects a ground cable to the chassis; leave it attached to the chassis. Replacement Note:
Install the machine screw (to bottom right corner) rst when installing the power supply.
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