iMac (Early 2006 20-inch).pdf

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iMac (Early 2006 20-inch)
Updated 13 April 2007
© 2006 Apple Computer, Inc. All rights reserved.
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iMac (Early 2006 20-inch)
Contents
What’s New 5
Manual Updates 5
iMac (Early 2006 20-inch) Product Features
Take Apart
General Information 10
Product View 10
How to identify your iMac 11
Tools Required 13
Orientation 13
Serial Number Location 13
Safety 14
Opening the Computer 15
Access Tool Modiication 15
EMI Shielding 18
Access Door 22
Memory 24
Front Bezel 28
Camera Board 36
Lower EMI Shield 42
IR Board 45
LCD Display Panel 50
Speakers 58
AirPort Extreme Card 64
Bluetooth Card 67
Optical Drive 70
Hard Drive 78
ii
Power Supply, AC/DC 85
Logic Board 91
AC Line Filter 102
Fan, Hard Drive 106
Fan, Optical Drive 110
Fan, CPU 113
Power Supply, DC/DC, Inverter 116
Ambient Light Sensor Board 119
Cable, Camera and IR 122
Bluetooth Antenna 125
AirPort Antenna 129
Clutch Mechanism 133
Rear Housing 137
Chassis 140
Stand 143
Troubleshooting
General Information 148
Serial Number Location 148
Power On Self Test (POST) 148
DDR Memory
Symptom Charts 150
How to Use the Symptom Charts 150
Power Issues 151
No Video 153
Video Distortion After Waking From Sleep 155
Display 158
Optical Drive 161
Fan Sound 166
AirPort/ 169
IR Remote 170
IR Sensor/Receiver 171
Built-in iSight Camera 172
Speakers 174
iii
Mouse 176
Keyboard 177
Error Beep(s) 178
USB 179
Views
iMac (Early 2006 20-inch)—Upper Exploded View 182
iMac (Early 2006 20-inch)—Lower Exploded View 183
Screw Chart 184
Screw Chart : iMac (Early 2006 20-inch): page 1 184
Screw Chart: iMac (Early 2006 20-inch) page 2 185
iv
What’s New
Manual Updates
April 2007
The optical drive removal procedure has been updated. Using a screwdriver to release the
optical drive tabs is causing damage to the logic board. The updated procedure shows how
to remove the optical drive using a needlenose pliers.
Additional information on handling slot-load optical drives can be referenced in Kbase
•
23 January 2007
The SMC reset procedure was corrected in the Troubleshooting chapter.
15 January 2007
The “ No Power ” symptom in Troubleshooting has been updated. If your computer won’t
turn on, try removing and reinstalling the SO-DIMMs.
13 November 2006
The DC/DC power supply was incorporated into the “ No Power ” troubleshooting steps
October 2006
31 October 2006: Troubleshooting has been updated with a new symptom, “ Fans running
at full speed after computer turns on .” Note: The customer may have entered a diagnostic
mode that causes the fans to run at full speed. This symptom is very easy to resolve at the
customer level.
Photos of the EMI tape (922-44786 and 922-5026), used to repair torn and damaged EMI
shielding, have been added to the EMI Shielding section in the General Information chapter.
•
July 2006
Troubleshooting symptom charts updated : Video Distortion After Waking From Sleep:
Shimmering, vertical lines, Horizontal lines
Logic Board/Take Apart
Added IR board to the “Preliminary Steps” list
In step 5, a note was added to mention the transfer of the metal brackets (clips) to the
new logic board if you replace the logic board
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April 2006
The iMac (Early 2006) 20-inch manual has been updated to show only one antenna cable
attached to the AirPort card.
iMac (Early 2006) — What’s New
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