Apple imac 20 inch early 2008 User Manual
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© 2008 Apple Inc. All rights reserved. Service Source iMac (20-inch Early 2008) 20 June 2008
ii 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 effort has been made to ensure that the information in this document is accurate. Apple is not responsible for printing or clerical errors. Apple 1 Infinite 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.
iii 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 Configurations 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
iMac (20-inch Early 2008) Take Apart iv 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
v 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 Troubleshootin g 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) 25 9 IR Remote 260 IR Sensor/Receiver 261
iMac (20-inch Early 2008) Take Apart vi Built-in iSight Camera 262 Speakers 264 Mouse (also see Wireless Issues topic) 265 Keyboard (also see Wireless Issues topic) 266 Wireless Issues (also see Additional Wireless Topics) 268 Additional Wireless Topics 272 Error Beep(s) 274 USB 275 Views iMac (20-inch Early 2008)—Upper Exploded View 278 iMac (20-inch Early 2008)—Lower Exploded View 279 Screw Chart 280
iMac (20-inch Early 2008) — Manual Updates 7 Manual Updates Updated 20 June 2008 Troubleshooting Symptom Charts:• Added new troubleshooting symptom: Optical Drive--> • Optical drive won’t eject media. Verify that two or three black clips (on the bezel) are positioned on top of the optical drive mechanism. Refer to the topic for images and more information. Added a new troubleshooting symptom: Error Beeps--> • iMac display is black and the system beeps nine times (3 short, 3 long, 3 short), then repeats. Remove the small coin battery located on the logic board near the right speaker. Wait 30 seconds, reinstall the battery. Product Introduction April 29, 2008 New images, screws, and updated text were added to the following sections: Take Apart Battery• AirPort• Bluetooth• LCD Display• LCD temp sensor cable• LVDS display cable • Right speaker• Optical drive fan• Optical flex cable• DC, power supply/SATA/inverter cable• Logic board• Audio board• Troubleshooting General Information: • Apple Hardware Test (AHT ) error code tabl • e was added that lists the code and the suspect part Logic Board Sensor and Fan Locators photo • Diagnostic LEDs: new photo of LEDs • Added Cleaning Tools for the LCD and Glass section • Added LensPen Cleaning Tool information •
iMac (20-inch Early 2008) — Manual Updates 8 Symptom Charts:• Added new troubleshooting sections called • Wireless Issues and Additional Wireless Topics to help troubleshoot wireless keyboards and mice Added a new symptom: Power Issues--> • System that intermittently shuts down or restarts unexpectedly Updated symptoms throughout for clarity, removed irrelevant links • Exploded View New part numbers were added to reference this iMac model•
© 2008 Apple Inc. All rights reserved. Service Source Take Apart iMac (20-inch Early 2008)
iMac (20-inch Early 2008) Take Apart — General Information 10 General Information Product View Product Features The iMac (20-inch Early 2008) computer has the same overall look as the previous iMac. The big differences are the upgraded processor (Intel Penryn chip) and the faster RAM speeds. New features: 2.4 or 2.66 GHz Intel Core 2 Duo processors • 1066 MHz front side bus• 2 GB and 4 GB memory options, PC2-6400 (800 MHz) DDR2, 4 GB max• Mac OS X version 10.5.2 Leopard•