Apple iMac G5 Power Supply, 20-inch User Manual

033-2497 Rev. B

iMac G5
Power Supply, 20-inch
Replacement Instructions
Follow the instructions in this document carefully. Failure to follow these instructions could
damage your equipment and void its warranty.
Note: Online instructions are available at http://www.apple.com/support/doityourself/.
Tools Required
• Use the screwdriver provided, or a Phillips #2 screwdriver, preferably with a
magnetized tip
• Flat-blade screwdriver
• Screw tray or equivalent to hold the screws
Part Location

Apple iMac G5 Power Supply, 20-inch Specifications

General

Input Voltage	100-240 V
Input Frequency	50-60 Hz
Connector Type	Proprietary
Model	iMac G5
Compatible Device	iMac G5 20-inch

Summary

Important Things to Know

Ambient Light Sensor Handling

Note sensor attachment and removal for specific models.

Screw Identification and Warranty

Identify brass-colored screws to avoid voiding warranty.

Static Discharge and Component Handling

Ground yourself and handle components by connectors.

Opening the Computer

Power Down and Cable Disconnection

Shut down the computer and unplug all cables.

Prepare for Internal Access

Lay the computer face down on a soft surface.

Remove the Back Cover

Loosen captive screws and lift the back cover off.

Removing the Power Supply

Grounding and Initial Preparation

Discharge static electricity before touching internal components.

Locate and Loosen Power Supply

Identify the power supply and loosen its retaining screws.

Disconnect Power Cables

Carefully disconnect the power supply cables from connectors.

Remove Power Supply Unit

Lift and tilt the power supply to clear the circuit board.

Return Old Component

Package and return the old power supply and sensor to Apple.

Installing the Replacement Power Supply

Prepare Replacement Part

Remove replacement from packaging, detach sensor if needed.

Install Power Supply Unit

Tilt and lower the new power supply into place on the logic board.

Seat Ambient Light Sensor

Ensure ambient light sensor is properly seated in the bezel.

Connect Cables

Connect ambient light sensor and main power supply connectors.

Secure Power Supply

Tighten captive screws and the right-side screw to secure unit.

Closing the Computer

Replace Back Cover

Align and press the cover into place until snug.

Secure and Power On

Tighten case screws and reconnect cables to power on.