Apple imac 20 inch mid 2009 User Manual
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iMac (20-inch, Early/Mid 2009) Take Apart — Logic Board 161 2010-11-24 4 Lift logic board up and out of rear housing. Important: Always handle logic board by edges of circuit board only. Never handle by heatsink or metal frame! Reassembly If you removed logic board to access another module, reassembly is an exact reversal of the steps. If installing a new replacement logic board, note 4 things: 1 Verify that tamper indicator labels on front and back of heatsink assembly are intact. If labels have been removed or tampered with, the logic board is not eligible for exchange.
iMac (20-inch, Early/Mid 2009) Take Apart — Logic Board 162 2010-11-24 2 Transfer the following items from old logic board to new logic board: • memory DIMMs • AirPort card For the Early 2009 model, also transfer: • Bluetooth board and cable • IR board and cable 3 Replace 2 pieces of EMI tape onto I/O ports and rear housing as shown. The EMI tape is included in the box with a new logic board. 4 Important: Make sure to return old logic board with audio board attached.
iMac (20-inch, Early/Mid 2009) Take Apart — Logic Board 163 2010-11-24 Handling Logic Boards 1 IMPORTANT: Always use 2 hands to support logic board and heatsink. Handling board incorrectly could flex board and damage chips and circuits. 2 Never handle board by heatsink.
iMac (20-inch, Early/Mid 2009) Take Apart — Hard Drive Fan 164 2010-11-24 First Steps Remove: • Access Door • Glass Panel • Front Bezel • LCD Panel • Right Speaker • Logic Board Tools • ESD wrist strap Hard Drive Fan
iMac (20-inch, Early/Mid 2009) Take Apart — Hard Drive Fan 165 2010-11-24 Removal 1 Lift fan straight up and off the 3 guideposts. Note: Image at right shows a map of connectors on top of logic board. Hard drive fan cable connects to the furthest right of the 3 connectors. Hard drive sensor has a 3-pin connector. Optical drive sensor has a 2-pin connector. Hard drive fan has a 4-pin connector.
iMac (20-inch, Early/Mid 2009) Take Apart — Hard Drive Data Cable 166 2010-11-24 First Steps Remove: • Access Door • Glass Panel • Front Bezel • LCD Panel • Right Speaker • Hard Drive • Logic Board Removal 1 Remove clear tape securing cable to chassis. 2 Lift cable out of computer. Hard Drive Data Cable
iMac (20-inch, Early/Mid 2009) Take Apart — Mechanism Cover 167 2010-11-24 First Steps Remove: • Access Door • Glass Panel • Front Bezel • LCD Panel • Right Speaker • Logic Board • Hard Drive • Hard Drive Fan Removal 1 Peel up EMI tape from top and bottom of mechanism cover. 2 Lift cover off mechanism. . Mechanism Cover
iMac (20-inch, Early/Mid 2009) Take Apart — Stand 168 2010-11-24 First Steps Remove: • Access Door • Glass Panel • Front Bezel • LCD Panel • Right Speaker • Logic Board • Hard Driv e • Hard Drive Fan • Mechanism Cover Tools • ESD wrist strap • Torx T10 screwdriver Stand
iMac (20-inch, Early/Mid 2009) Take Apart — Stand 169 2010-11-24 Removal 1 Remove T10 screws: (7) 922-8209 2 Lift stand off 2 pins on mechanism. 3 Carefully separate stand from mechanism and rear housing. Replacement Note: If installing a new replacement stand, transfer U-shaped black plastic piece with serial number to new stand.
iMac (20-inch, Early/Mid 2009) Take Apart — Mechanism 170 2010-11-24 First Steps Remove: • Access Door • Glass Panel • Front Bezel • LCD Panel • Right Speaker • Logic Board • Hard Drive • Hard Drive Fan • Mechanism Cover • Stand Tools • ESD wrist strap • Torx T10 screwdriver Mechanism