imac_20_early_08(1).pdf

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 Service Source
iMac (20-inch Early 2008)
20 June 2008
© 2008 Apple Inc. All rights reserved.
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 Apple Inc.
© 2008 Apple Inc. All rights reserved.
Under the copyright laws, this document may not be copied, in whole or in part, without the
written consent of Apple.
Every efort has been made to ensure that the information in this document is accurate. Apple is
not responsible for printing or clerical errors.
Apple
1 Ininite Loop
Cupertino, CA 95014-2084
USA
+ 1 408 996 1010
www.apple.com
Apple, the Apple logo, Mac, and Macintosh are trademarks of Apple Inc., registered in the U.S. and
other countries.
ii
iMac (20-inch Early 2008)
Contents
Manual Updates 7
Updated 20 June 2008 7
Product Introduction April 29, 2008 7
Take Apart
General Information 10
Product Features 10
Product Conigurations 11
Opening the Computer 11
Note About Images in This Manual 11
Serial Number Location 12
General Tools 12
Required Special Tools 12
Cleaning Tools Starter Kit 13
Removing the Glass Panel 13
View Under the LCD Panel 14
View of the Main Modules 14
View of Inside the Rear Housing 15
Back View 15
I/O Ports 16
Cleaning and Handling the Glass Panel 17
Do’s and Don’ts 18
Handling a Broken Glass Panel 18
Safety 19
EMI Shielding 20
Access Door 22
Memory 24
Glass Panel 28
Cleaning and Handling of the Glass Panel 29
Isopropyl Alcohol (IPA) 30
Removing the Glass Panel 32
Replacing the Glass Panel 35
Installing a Replacement Glass Panel 40
Cleaning Tool Kit 43
iii
Cleaning Tool Resources 43
LENSPEN Screen Cleaning Device 44
Front Bezel 46
Camera Board 52
Battery 56
IR (Infrared) Board 59
AirPort Extreme Card 62
Bluetooth Board 65
LCD Display Panel 68
LCD Temp Sensor Cable 76
LVDS Cable 82
Inverter 87
Speaker, Right 93
Speaker, Left 96
Ambient Temperature Sensor Cable 101
Ambient Temperature Sensor 104
Optical Drive Fan 108
CPU Fan 113
Power Supply, AC/DC 116
Hard Drive 124
Hard Drive Sensor Cable 130
Optical Drive 133
Optical Drive Flex Cable 138
Optical Sensor Cable 141
Logic Board 144
Video Card 153
Hard Drive Fan 158
Audio Board 162
iMac (20-inch Early 2008) Take Apart iv
Camera Cable 165
Microphone Cable 172
Hard Drive Data Cable 179
Mechanism Cover 182
Clutch Mechanism 185
Cable, DC, Power Supply/SATA/Inverter 189
Rear Cover 206
Stand 209
Chassis 213
Troubleshooting
General Information 224
Serial Number 224
Power On Self Test (POST) 225
Firmware Updates 225
DDR Memory 225
How to Reset the System Management Controller (SMC) 226
Diagnostic LEDs 227
Apple Hardware Test (AHT) Error Codes 228
Logic Board Sensor and Fan Connector Locations, Top Side 230
Logic Board Sensor Locations, Back Side 231
Cleaning Tools for the LCD and Glass 231
LensPen Cleaning Tool 232
Ionizing Air Gun 233
Symptom Charts 234
How to Use the Symptom Charts 234
Diagnostics 234
Apple Hardware Test (AHT) Error Codes 235
Power Issues 237
System Shuts Down 242
Display 242
Hard Drive 244
Optical Drive 246
Fan Sound 253
AirPort 258
Bluetooth (also see Wireless Issues topic) 259
IR Remote 260
IR Sensor/Receiver 261
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