Apple imac 20 inch mid 2009 User Manual
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Apple Technician Guide iMac (20-inch, Early/Mid 2009) iMac (20-inch, Early 2009), iMac (20-inch, Mid 2009) Updated: 2010-11-24
Apple Inc. © 2009-2010 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.
iMac (20-inch, Early/Mid 2009) About This Guide Updates 8 Updated 24 November 2010 8 Updated 1 May 2009 8 Updated 28 April 2009 8 Introduced 3 March 2009 9 Feedback 9 Basics Overview 11 Product Features 11 Differences Between Models 11 Product Configuration 12 Serial Number Location 12 Troubleshooting General Troubleshooting 14 Update System Software & Firmware 14 Troubleshooting Theory 14 Hardware vs. Software 14 Apple Hardware Test 14 Apple Service Diagnostic 15 Common Reset Procedures 15 Power On Self Test (POST ) 15 Starting Up in Safe Mode 15 Resetting Parameter RAM (PRAM) 16 Resetting the System Management Controller (SMC) 16 Diagnostic LEDs 17 Sensor and Fan Connector Locations 18 Block Diagram 19 Symptom Charts 20 Startup and Power 20 No Power, Dead Unit 20 Won’t Start Up 22 Intermittent Shutdown 24 Kernel Panic, System Crashes 26 No Video 28 Corrupted Video 29 Burnt Smell/Odor 31 Uncategorized Symptoms 32
Display 33 Backlight Issue/No Backlight 33 Incorrect/Missing Colors 38 Distorted/Blurred Image 39 Pixel Anomalies 41 Vertical/Horizontal Lines 42 Non-Uniform Brightness 44 Cosmetic Defects 45 Uncategorized Symptoms 45 Mass Storage 46 Hard Drive Not Recognized 46 Hard Drive Read/Write Error 48 Hard Drive Noisy 49 Optical Drive Not Recognized 51 Optical Drive Won’t Accept/Eject Media 52 Optical Drive Read/Write Error 54 Optical Drive Not Performing to Specifications 55 Optical Drive Noisy 56 Uncategorized Symptoms 57 Communications 58 AirPort/Bluetooth Issues 58 AirPort Card Kernel Panic 60 Ethernet Port/Device Issue 61 Wireless Input Device Doesn’t Pair 62 Wireless Input Device Loses Connection 64 Uncategorized Symptoms 66 Input/Output Devices 67 Apple Remote Inoperable 67 Audio: Microphone 68 Audio: Built-in Speakers Have Distorted Sound 70 Audio: Built-in Speakers Have No Audio 71 Camera Issues 73 FireWire Devices Not Recognized 74 USB Devices Not Recognized 76 Wired Keyboard Does Not Function Properly 78 Keyboard: Specific Keys Do Not Respond 80 Wired Keyboard/Mouse Not Recognized 80 Uncategorized Symptoms 82 Mechanical 83 Noise/Hum/Vibration 83 Fan Failures / Thermal Issues 86 Stand/Hinge Issues 87 Physical Damage 87 Uncategorized Symptoms 88
Take Apart General Information 90 Opening the Unit 90 Required Tools 90 Required Special Tools for Glass Panel 91 Cleaning Tools Starter Kit 91 Cleaning & Handling the Glass Panel 92 Do’s and Don’ts 92 Handling a Broken Glass Panel 92 How to Remove a Broken Glass Panel 93 Safety 97 Logic Board Handling 98 Reassembly Steps 99 Images in This Guide 99 Screw Sizes 99 Access Door 100 Memory 101 Glass Panel 103 Removal 104 Reassembly 105 Front Bezel 109 Camera 112 Battery 114 IR (Infrared) Board 116 AirPort Extreme Card 118 Bluetooth Board 120 LCD Panel 122 LVDS Cable 126 Hard Drive 128 Hard Drive Sensor Cable 132 Optical Drive 134 Optical Drive Sensor Cable 137 Optical Drive Fan 139 Optical Drive Data Cable 141 Inverter 143 Power Supply 145
Left Speaker 148 Ambient Temp Sensor Cable 150 CPU Fan 152 Right Speaker 154 Audio Board 156 Logic Board 159 Removal 160 Reassembly 161 Handling Logic Boards 163 Hard Drive Fan 164 Hard Drive Data Cable 166 Mechanism Cover 167 Stand 168 Mechanism 170 Chassis 172 Cable, DC, Power Supply/SATA/Inverter 175 Removal 176 Reassembly 178 Camera Cable 181 Microphone Cable 183 Rear Housing 185 Views Exploded Views 187 iMac (20-inch, Early 2009), Part 1 187 iMac (20-inch, Early 2009), Part 2 188 iMac (20-inch, Mid 2009), Part 1 189 iMac (20-inch, Mid 2009), Part 2 190 Screw Chart 191 Internal Views 193 I/O Ports 195
© 2009-2010 Apple Inc. All rights reserved. Apple Technician Guide About This Guide iMac (20-inch, Early/Mid 2009)
iMac (20-inch, Early/Mid 2009) — Updates 8 2010-11-24 Updates Updated 24 November 2010 Troubleshooting: • General: Updated information and links for Updating System Software & Firmware, Troubleshooting Theory, and Common Reset Procedures. • Startup and Power: No Power, Dead Unit: Step 6: Yes: Changed action to “Go to step 7.” • Startup and Power: Intermittent Shutdown: Step 1: Updated information about which console log to check for OS 10.6 vs. OS 10.5 and earlier. Take Apart: • General: • Updated “Required Tools” and removed commercial screen cleaning products; • Rewrote “Handling a Broken Glass Panel”; • Consolidated information about ESD Safety. • Access Door: Modified “First Steps”. • Glass Panel: Modified “First Steps” and cleaning procedures; microfiber cloth should only be dampened with water (rather than isopropyl alcohol or commerical screen cleaning products). • Camera: Changed tool needed from T8 to T10 screwdriver. • Logic Board and Audio Board: Added note “If replacing logic board, be sure to leave audio board attached and return it with the old logic board.” Views: • Exploded Views: • Removed iMac (20-inch, Early 2009) logic board part #661-4984, which is now substituted with part #661-5136. • Added iMac (20-inch, Mid 2009) 2.26 GHz logic board part #661-5514. Updated 1 May 2009 Views: • Exploded Views: Corrected rear housing information for Mid 2009 model. Updated 28 April 2009 Basics: • Added section about differences between Early 2009 and Mid 2009 models. Troubleshooting: • General Troubleshooting: Added sections about Apple Hardware Test and Apple Service Diagnostic, how to determine which version to use.
iMac (20-inch, Early/Mid 2009) — Feedback 9 2010-11-24 • Block Diagram: Added note that Mid 2009 model does not have IR or Bluetooth. Take Apart: • Front Bezel: Added reassembly note to install bottom of bezel first. • Camera Board: Corrected screw size and part number. • IR Board: Added note that Mid 2009 model does not have an IR Board. • Bluetooth Board: Added note that Mid 2009 model does not have a Bluetooth Board. • Optical Drive: Added reassembly note to avoid trapped inverter cables. • Hard Drive Sensor Cable, Optical Drive Sensor Cable, Hard Drive Fan: Added details about connector pin sizes. • Logic Board: Added note that Mid 2009 model does not have IR or Bluetooth boards. Added note to route camera cable over, not under, the logic board. Removed note to transfer black plastic airdam from old board to new board, as it should be included with new board. Views: • Exploded Views: Added 1 logic board part number for Early 2009 model. Added new exploded views for Mid 2009 model. • Screw Chart: Corrected camera screw size and part number. Introduced 3 March 2009 Feedback We want your feedback to help improve this and future Technician Guides! Please email any comments to: [email protected]
© 2009-2010 Apple Inc. All rights reserved. Apple Technician Guide Basics iMac (20-inch, Early/Mid 2009)