Apple imac usb 2 0 User Manual

							
82 - iMac (USB 2.0)  Take Apart
 Housing, Outer Shell, Plastic
Housing, Outer Shell, Plastic 
Tools
This procedure requires the following tools:
• Torx-10 screwdriver
Part Location
Preliminary Steps
Before you begin, do the following:
• Position the computer in the service stand.
• Remove the user access plate.
• Remove the bottom housing.
• Remove the drive carrier assembly.
• Remove the power supply.
• Remove the power supply insulators.
• Remove the optical drive door.
• Remove the fan.
• Remove the fan bracket under the fan. 
						

							
 iMac (USB 2.0)  Take Apart - 83
 Housing, Outer Shell, Plastic • Remove the neck spoke retainer cap.
• Remove the blind mate connector screws. 
						

							
84 - iMac (USB 2.0)  Take Apart
 Housing, Outer Shell, Plastic
Procedure
1. Remove the two black screws that connect the neck to the base. 
2. Carefully feed the neck cables through the hole on the vent cap shown below.  
						

							
 iMac (USB 2.0)  Take Apart - 85
 Housing, Outer Shell, Plastic 3. Next, carefully separate the outer plastic housing from the neck.
4. Remove one screw in the base of the Faraday cage to separate the white outer shell 
from the Faraday cage.  
						

							
86 - iMac (USB 2.0)  Take Apart
 Housing, Outer Shell, Plastic
Warning:
 Whenever the bottom housing is opened for service, you must do two things:
1.You must clean the original thermal film from all thermal interface ma\
ting surfaces, 
and reapply thermal paste to the mating surfaces on the thermal pipe.
2. You must tighten the four torx screws on the bottom housing to a mini\
mum of 17 
in.-lbs. Use a torque driver (service tool 076-0899) to ensure that th\
e thermal pipe is 
firmly mated with the top base. If you do not have a torque driver, you \
must make 
sure the screws are tightened by hand FIRMLY, BUT NOT FORCIBLY. 
Failure to follow these steps could cause the computer to overheat and 
damage internal components.
Refer to the topic “Thermal Paste Application” for detailed inform\
ation. 
						

							
 iMac (USB 2.0)  Take Apart - 87
 Display, 20" Flat Panel
Display, 20 Flat Panel
Tools
This procedure requires the following tools:
• 1.5 mm hex tool
• Torx-10 screwdriver
Part Location
Preliminary Steps
Before you begin, do the following:
• Position the computer in the service stand. 
						

							
88 - iMac (USB 2.0)  Take Apart
 Display, 20" Flat Panel
Procedure
1. Remove three screws that connect the back cover to the flat panel LCD display. Use 
the 1.5 mm hex tool to remove these screws. 
2. Support the back cover and push on the display bezel (as shown) to separate the  display bezel from the display’s back panel. 
						

							
 iMac (USB 2.0)  Take Apart - 89
 Display, 20" Flat Panel 3. Carefully raise the top side of the display and disconnect the inverter cables (yellow 
circles). 
Replacement Note:   Important:  Make sure that the inverter cables (red circles 
below) are NOT pinched when the panel is lowered into place. 
4. Raise the display a bit more to access the TMDS display connector. Peel back the  black tape. 
						

							
90 - iMac (USB 2.0)  Take Apart
 Display, 20" Flat Panel
5. Disconnect the TMDS display connector by squeezing the clips (1) on each side of the 
connector and gently pulling the cable (2) out of the slot.
6. Raise the panel all the way up. Disconnect the power on LED cable (on the left).  
						

							
 iMac (USB 2.0)  Take Apart - 91
 Display, 20" Flat Panel 7. Disconnect the microphone cable (on the right).
8. Separate the panel from the rear housing/shield.
9. Set the panel face down. Remove the four screws that connect the LCD panel to the 
display bezel.