Apple imac 21 5 inch late 2009 User Manual
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Apple Technician Guide iMac (21.5-inch, Late 2009) Updated: 2010-11-18
Apple Inc. © 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 (21.5-inch, Late 2009) Contents About This Guide Updates 9 Updated 18 November 2010 9 Updated 5 March 2010 10 Updated 8 January 2010 10 Updated 24 November 2009 10 Updated 28 October 2009 11 Introduced 20 October 2009 11 Feedback 11 Basics Overview 13 Identifying Features 13 Product Configurations 14 Wireless Troubleshooting 14 Safety 15 Serial Number Location 16 Troubleshooting General Troubleshooting 18 Wireless Troubleshooting 18 Update System Software & Firmware 18 Troubleshooting Theory 18 Hardware vs. Software 18 Common Reset Procedures 19 Power On Self Test (POST ) 19 Resetting the System Management Controller (SMC) 19 Resetting Parameter RAM (PRAM) 20 Starting Up in Safe Mode 20 Diagnostics 21 Diagnostic LEDs 23 LED Functions 24
LED Startup Sequence 25 Logic Board Test Points 26 Sensor and Fan Connector Locations 27 Block Diagram 28 Symptom Charts 29 Startup and Power 29 No Power, Dead Unit 29 Won’t Start Up 31 Intermittent Shutdown 33 Kernel Panic, System Crashes 35 No Video 37 Corrupted Video 39 Burnt Smell/Odor 41 Uncategorized Symptoms 42 Display 43 Backlight Issue/No Backlight 43 Noise / Unstable Flickering 45 LCD Image Issues 47 Incorrect/Missing Colors 48 Distorted/Blurred Image 49 Pixel Anomalies 51 Vertical/Horizontal Lines 52 Non-Uniform Brightness 54 Cosmetic Defects 55 Uncategorized Symptoms 55 Mass Storage 56 Hard Drive Not Recognized 56 Hard Drive Read/Write Errors 58 Hard Drive Noisy 59 Optical Drive Not Recognized 61 Optical Drive Won’t Accept/Eject Media 62 Optical Drive Read/Write Error 63 Optical Drive Not Performing to Specifications 65 Optical Drive Noisy 66 SD Card Will Not Insert Into Slot 67 SD Card Not Recognized 68 Uncategorized Symptoms 69 Communications 70 AirPort/Bluetooth Issues 70 AirPort Card Kernel Panic 72 Ethernet Port/Device Issue 73 Wireless Input Device Doesn’t Pair 74 Wireless Input Device Loses Connection 76 Uncategorized Symptoms 78
Input/Output Devices 79 Apple Remote Inoperable 79 Audio: Microphone 81 Audio: Built-in Speakers Have Distorted Sound 82 Audio: Built-in Speakers Have No Audio 83 Camera Issues 85 FireWire Device Not Recognized 86 USB Device Not Recognized 88 Wired Keyboard Does Not Function Properly 90 Keyboard: Specific Keys Do Not Respond 92 Wired Keyboard/Mouse Not Recognized 92 Uncategorized Symptoms 94 Mechanical 95 Noise/Hum/Vibration 95 Fan Failures / Thermal Issues 98 Stand/Hinge Issues 99 Physical Damage 100 Uncategorized Symptoms 100 Take Apart General Information 102 Opening the Unit 102 Required Tools 102 Required Special Tools for Glass Panel 103 Cleaning Tools Starter Kit 103 Cleaning & Handling the Glass Panel 104 Do’s and Don’ts 104 Handling a Broken Glass Panel 104 How to Remove a Broken Glass Panel 105 Safety 109 Logic Board Handling 110 Note About Images in This Guide 110 Access Door 111 Memory 113 Glass Panel 115 Removal 116 Reassembly 117 Camera 120 LCD Panel 123 Handling LCD Panel 127
Vertical Sync Cable 129 LCD Temp Sensor Cable 130 LVDS Cable 131 Bluetooth Antenna 132 Bluetooth Board 134 AirPort Antenna 136 AirPort Card 138 AirPort Cable 140 AirPort Carrier Board 142 LED Backlight Board 144 Power Supply 146 Backlight Pressure Wall 148 Power Supply Pressure Wall 150 Hard Drive 152 Hard Drive Sensor Cable 155 Bluetooth Cable 157 Camera Cable 160 Optical Drive 163 Optical Drive Sensor Cable 166 Optical Drive Fan 168 SD Card Reader 170 SD Cable 172 Audio Cable 174 IR Board & Cable 176 Logic Board 178 Video Card 185 Battery 187
Hard Drive Data Cable 189 Optical Drive Data Cable 191 Cable, AC/DC Power/Backlight/SATA 193 CPU Fan 194 Ambient Temp Sensor 197 Left Speaker 199 Right Speaker 201 Hard Drive Fan 203 Mechanism Cover 205 Stand 207 Mechanism 209 Optical Drive Pressure Wall 211 Microphone Cable 213 Rear Housing 214 Views Exploded Views 217 iMac (21.5-inch, Late 2009), Part 1 217 iMac (21.5-inch, Late 2009), Part 2 218 iMac (21.5-inch, Late 2009), Part 3 219 Screw Chart 220 External Views 222 Front View 222 Rear View 223 I/O Ports 224 Internal Views 225 Photo of Components below LCD 225 Photo of Components below Logic Board 226 Logic Board, Front Side 227 Logic Board, Back Side 227
© 2010 Apple Inc. All rights reserved. Apple Technician Guide About This Guide iMac (21.5-inch, Late 2009)
iMac (21.5-inch, Late 2009) — Updates 9 2010-11-18 Updates Updated 18 November 2010 SD Board renamed SD Card Reader throughout document. Troubleshooting • General Information: Wireless Troubleshooting: added more kBase links. • General Information: Common Reset Procedures: rewrote SMC section. Take Apart • General Information: • Required Tools: added Thermal paste syringe (Apple part #922-9625) for camera; • removed commercial screen cleaning products. • Memory: Removal Step 2: added “For better grip, attach double-stick tape to ends of tabs.” • Glass Panel: • rewrote Removal Step 1; • changed cleaning procedures to indicate microfiber cloth should only be dampened with water (rather than isopropyl alcohol or commerical screen cleaning products). • Camera: added reassembly instructions to transfer or add thermal paste between camera and rear housing. • LCD Panel: • added reassembly note not to overtighten LCD screws, which could cause light leakage after reassembly; • added new section “Handling LCD Panel”. • Hard Drive: • added image of screw pins; corrected screwdriver size to T8 for 922-9136 and 922-7001 • corrected image of Western Digital temp sensor cable placement. • Hard Drive Sensor Cable: • corrected image of Western Digital temp sensor cable placement. • Audio Cable: added reassembly note that plugging in earbuds can help keep cable aligned while tightening screws. • Logic Board: • added note that logic board is much easier to reinstall if memory is removed; • added replacement foil strip part #922-8378; • added reassembly notes to help align logic board: push up gently with your thumb on lower edge of video card heatsink (if present), and plug in USB, Ethernet, and/or Mini DisplayPort cables while tightening screws. • Optical Drive Pressure Wall: added chapter. • Rear Housing: added reassembly instructions to transfer or add thermal paste between camera and rear housing.
iMac (21.5-inch, Late 2009) — Updates 10 2010-11-18 Updated 5 March 2010 Take Apart • Camera: Added screw part number 922-9239. • LCD Panel: • Step 2: added caution: “Tilt display out no more than 4 inches (10 cm). Pulling display too far could damage cables or connectors.” • Step 3: added reassembly note: “Verify that all cables are firmly seated into connectors.” • Vertical Sync Cable: Added reassembly note: “Insert cable securely into connector and replace all mylar tape.” Updated 8 January 2010 Troubleshooting • General: Reworded “Update System Software & Firmware” section to indicate that using the wrong version of Mac OS X can cause certain symptoms, and added link to: kBase #TS3101: iMac (Late 2009): Using the correct Mac OS X system software • General: Updated Apple Service Diagnostic and Apple Hardware Test version numbers, updated Apple Hardware Test error code table. • Startup Power: • Updated “No Video” symptom code flow to include a check of the LVDS cable connection to back of LCD panel. • Updated “Corrupted Video” symptom code flow to include a check for the correct Mac OS X build version. • Display: Updated “Noise/Unstable Flickering” symptom code flow to include a check of the Vertical sync cable connections. Views • Exploded Views: Added note that Video Card is “only for MXM models; not present with integrated graphics”. Updated 24 November 2009 Troubleshooting • General: Updated close-up image of diagnostic LEDs. • Mechanical: Fan noise issues: updated two topics, “Noise/Hum/Vibration” and “Fan Failures/ Thermal Issues” with the following information: • Check: Verify if any tape, gasket, cable label, or cable is touching the fan blades and causing a ticking noise. • Actions: Secure the material so it doesn’t touch fan blades. If tape adhesive has lost its stickiness, replace that section of tape. Take Apart • General Information: Added images to section “How to Remove a Broken Glass Panel.” • Hard Drive and Hard Drive Sensor Cable: Added information about connecting sensor cables to Western Digital drives: Orient the drive with its circuit board facing up and connect the sensor cable to the hard drive pins, leaving the 2 left pins unconnected (exposed).