Apple imac 20 inch early 2008 User Manual

							iMac (20-inch Early 2008)  Take Apart — Ambient Temperature Sensor Cable 101
Ambient Temperature Sensor 
Cable
Tools
The only tool required for this procedure is a black stick (or other nonconductive plastic or nylon 
tool).
Preliminary Steps
Before you begin, remove the following:A
• ccess door
Glass Pane
• l
F
• ront bezel
LCD display pane
• l
Speaker, left
• 
Part Location 
						

							iMac (20-inch Early 2008)  Take Apart — Ambient Temperature Sensor Cable 10 2
Removing the Ambient Temperature Sensor Cable
Note the cable routing from the left speaker to the logic board. The cable tucks under the 1. 
tab on the CPU fan.
 
Disconnect the cable from the sensor board on the speaker and the connector on the logic 2.  
board. Note: The cable is offered separately as a service part.
 . 
						

							iMac (20-inch Early 2008)  Take Apart — Ambient Temperature Sensor Cable 10 3
Replacing the Ambient Temperature Sensor Cable
Connect the cable to the sensor board on the left speaker and to the logic board.1. 
Replace the front bezel.2.  
Clean and replace the glass panel3. . Note: This step is very important. Follow the procedures 
to ensure the glass is clean and free of particles.
Replace the access door
4.  . 
						

							iMac (20-inch Early 2008)  Take Apart — Ambient Temperature Sensor 10 4
Ambient Temperature Sensor
Tools
A black stick to remove the sensor off the speaker• 
Preliminary Steps
Before you begin, remove the following:
A
• ccess door
Glass Pane
• l
F
• ront bezel
LCD display pane
• l
Speaker, left
• 
Part Location 
						

							iMac (20-inch Early 2008)  Take Apart — Ambient Temperature Sensor 10 5
Removing the Ambient Temperature Sensor
1. Disconnect the ambient temperature sensor cable from the logic board, and remove the left 
speaker if you haven’t done so already.
Disconnect the ambient temperature sensor cable from the left speaker.2.  
Use a black stick to remove the sensor from the adhesive on the side of the speaker.3.  
						

							iMac (20-inch Early 2008)  Take Apart — Ambient Temperature Sensor 10 6
Replacing the Ambient Temperature Sensor
Attach the temp sensor to the left speaker. Connect the temperature sensor cable to the 1. 
sensor.  Replace the left speaker and speaker screw.
Connect the temperature sensor cable to the logic board connector.2.  
Replace the display panel3. .
Replace the front bezel.
4.   
						

							iMac (20-inch Early 2008)  Take Apart — Ambient Temperature Sensor 10 7
Clean and replace the glass panel5. . Note: This step is very important. Follow the procedures 
to ensure the glass is clean and free of particles.
Replace the access door
6.  . 
						

							iMac (20-inch Early 2008)  Take Apart — Optical Drive Fan 108
Optical Drive Fan
Tools
No tools are required to remove the optical drive fan.• 
Preliminary Steps
Before you begin, remove the following:
A
• ccess door
Glass pane
• l
F
• ront bezel
LCD display pane
• l
Optical driv
• e
Part Location 
						

							iMac (20-inch Early 2008)  Take Apart — Optical Drive Fan 109
Removing the Optical Drive Fan 
With a black stick, pry off the metal clip covering the optical cable connector. 1. 
Disconnect the optical flex cable connector from the audio board.2.  
3. Disconnect the fan cable from the logic board (to the right of the optical cable connector). 
						

							iMac (20-inch Early 2008)  Take Apart — Optical Drive Fan 11 0
Lift the fan off the guide posts on the rear housing.
4.