Apple imac 20 inch late 2006 User Manual

							 Service Source
© 2006 Apple Inc. All rights reserved.
iMac (20-inch Late 2006)
13 December 2007 
						

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iMac (20-inch Late 2006)
Contents
Take Apart
General Information 6
Product View 6
Serial Number Location   7
Tools Required  9
Safety  10
Access Tool Modification  11
What’s New  17
Access Door  19
Front Bezel  21
Camera Board  29
Lower EMI Shield  35
IR Board  38
Battery  43
LCD Display Panel  45
Memory  52
Speakers  56
AirPort Extreme Card  60
Bluetooth Card  65
Optical Drive  68
Hard Drive  76
Power Supply  83
Logic Board  89
AC Power Inlet  99 
						

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Fan, Hard Drive 103
Fan, Optical Drive  107
Fan, CPU  110
Inverter  113
Ambient Light Sensor Board  117
Cable, Camera and IR  120
Bluetooth Antenna  123
AirPort Antennas  127
Clutch Mechanism  131
Chassis  135
Rear Housing  139
Stand  142
Cable, AC/DC SATA, Inverter Power  146
Troubleshooting
General Information 151
Symptom Charts  156
How to Use the Symptom Charts  156
Power Issues  157
No Video  158
Video Distortion After Waking From Sleep  160
Display  163
Optical Drive   167
Fan Sound  172
AirPort  176
Bluetooth  177
IR Remote  178
IR Sensor/Receiver  179
Built-in iSight Camera  180
Speakers  182
Mouse  183
Keyboard  184
Error Beep(s)  185
USB  186 
						

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Views
iMac (20-inch Late 2006)—Upper Exploded View 188
iMac (20-inch Late 2006)—Lower Exploded View  189
Screw Chart  190
Screw Chart : iMac (20-inch Late 2006): page 1   190 
						

							 Service Source
© 2006 Apple Computer, Inc. All rights reserved.
Take Apart
iMac (20-inch Late 2006) 
						

							iMac (20-inch Late 2006) Take Apart — General Information 6
General Information
Product View 
						

							iMac (20-inch Late 2006) Take Apart — General Information 7
Serial Number Location 
On the bottom of your iMac stand, you’ll find a label with the serial number printed on it: 
Serial Number Location  
						

							iMac (20-inch Late 2006) Take Apart — General Information 8
What’s New on the iMac (20-inch Late 2006)?
Logic board
Intel Core 2 Duo Processor running at 2.16 or 2.33 GHz
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AirPort Extreme and Bluetooth antennas
Separate antennas: Two AirPort antennas, one Bluetooth antenna 
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Inverter Board
New service part, 661-4112. It serves as the flat panel backlight controller.
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Camera Board
New service module, 661-4113, is smaller than previous camera boards.
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Memory
Supports up to 3 GB system memory
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Supports two standard PC2-5300 DDR2 SO-DIMM modules
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Rear cover and Front bezel 
New part numbers (922-7769 and 922-7875) with slight revisions to each part
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DC-DC Board
There is no DC/DC board. The functionality previously accomplished on the DC/DC board has 
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been integrated into the logic board 
						

							iMac (20-inch Late 2006) Take Apart — General Information 9
Tools Required
The following tools are required to service the computer. Note that a special access card (part 922-
7172) is required to open the front bezel.ESD-safe workstation and mat
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Soft, clean towel or cloth (to protect the display and removed parts from scratches)
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Access card to open the rear cover (part 922-7172)
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Black stick (or other nonconductive nylon or plastic flat-blade tool)
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Phillips #1 screwdriver
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Phillips #2 screwdriver
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Torx T8 screwdriver (magnetized)
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Torx T6 screwdriver (magnetized)
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Torx T10 screwdriver (magnetized)
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Flat-blade screwdriver
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							iMac (20-inch Late 2006) Take Apart — General Information 10
Safety
Warning: When the iMac (20-inch Late 2006)  is under power, be aware that the power supply 
contains high voltages that pose a potential hazard to your personal safety . Never work on or near 
the power supply with the unit powered on, and as a further precaution always make sure the unit 
is unplugged when working on it with the front bezel removed.
WARNING: HIGH VOLTAGE  Text or photographs marked by this symbol indicate that a potential hazard to your personal safety 
exists from a high voltage source.
The AC/DC power supply board is a high voltage source with the unit under power, and remains 
powered up whenever the system is plugged in, whether or not the system is turned on. Use 
extreme caution when troubleshooting the system with the front bezel removed. Disconnect power to the system before performing maintenan
•  ce.
Don’t work alone. In the even of an electrical shock it is important to have another 
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individual present who can provide assistance.
Keep one hand in your pocket when working on any 
•  iMac (20-inch Late 2006) 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 
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if they accidentally make contact with the power supply circuitry .