Apple imac usb 2 0 User Manual

							
 
2 -  
 iMac (USB 2.0)  Take Apart  General Information 
 Service Stand
 
1. Support the computer by neck and the base (A). Gently position the computer in the  service stand with the flat panel facing up (B). 
2.    
Note:  
 The base of the computer can be rotated when servicing internal parts. 
						

							
  iMac (USB 2.0)  Take Apart - 
 
3
 
 User Access Plate 
 User Access Plate
 
Tools
 
This procedure requires the following tools:
• Phillips #0 screwdriver 
Part Location
Preliminary Steps
 
Before you begin, do the following:
• Position the computer in the service stand. 
						

							
 
4 -  
 iMac (USB 2.0)  Take Apart  User Access Plate 
Procedure
 
1. Loosen the four captive screws on the access panel.
2. Remove the panel by grabbing onto two captive screws and lift the panel off the base. 
						

							
  iMac (USB 2.0)  Take Apart - 
 
5
 
 AirPort Extreme Card 
AirPort Extreme Card
 
Tools
 
This procedure requires no tools. 
Part Location
Preliminary Steps
 
Before you begin, do the following:
• Position the computer in the service stand.
• Remove the user access plate. 
						

							
 
6 -  
 iMac (USB 2.0)  Take Apart  AirPort Extreme Card 
Procedure
 
1. Unplug all cables from the computer   
except  
 the power cord. 
2.  
Important:  
 To avoid electrostatic discharge, always ground yourself by touching 
metal before you touch any parts or install any components inside the co\
mputer. To 
avoid static electricity building back up in your body, do not walk arou\
nd the room until 
you have completed the installation and closed the computer. 
3. Touch a metal surface inside the computer to ground yourself.
4. Unplug the power cord.
5. Pull the plastic tab on the AirPort Extreme card to remove it from the slot. Disconnect  the AirPort antenna from the card. 
						

							
  iMac (USB 2.0)  Take Apart - 
 
7
 
 Memory, SO-DIMM (user-installable) 
Memory, SO-DIMM (user-
installable)
 
Tools
 
No tools are required for this procedure. 
Part Location
Preliminary Steps
 
Before you begin, do the following:
• Position the computer in the service stand.
• Remove the user access plate.  
Note:  
  DIMMs used in this slot should be a low-profile PC2700 (DDR333) SO-DIMM. Only 
the SO-DIMM slot is accessible by the user.  
						

							
 
8 -  
 iMac (USB 2.0)  Take Apart  Memory, SO-DIMM (user-installable) 
Procedure
 
1. Unplug all cables from the computer except the power cord.
2.  
Important:  
 To avoid electrostatic discharge, always ground yourself by touching 
metal before you touch any parts or install any components inside the co\
mputer. To 
avoid static electricity building back up in your body, do not walk arou\
nd the room until 
you have completed the installation and closed the computer. 
3. Touch a metal surface inside the computer to ground yourself.
4. Unplug the power cord.
5. Release the memory by spreading apart the tabs in the expansion slot from the  notches in the card.  
						

							
 
 iMac (USB 2.0)  Take Apart -   
9
 
 Memory, SO-DIMM (user-installable) 6. Allow the memory to pop up slightly, and pull it out of the memory slot.  
						

							
 
10 -  
 iMac (USB 2.0)  Take Apart  Bottom Housing 
Bottom Housing
 
Tools
 
This procedure requires the following tools:
• Torx-15 screwdriver 
Part Location
Preliminary Steps
 
Before you begin, do the following:
• Position the computer in the service stand.
• Remove the user access plate. 
						

							
 
 iMac (USB 2.0)  Take Apart -   
11
 
  
Procedure
 
1. When opening the bottom housing, rotate the base so the optical drive door is on the  right. (This position is less stressful on the internal cables when the bottom is open).
2. Remove the four torx screws.   
Note:  
 The bottom housing on the 20-inch iMac (USB 
2.0) display has a different part number (922-6288) from the bottom housing (922-
5804) used on the 15-inch and the 17-inch iMac (USB 2.0) computers. Exchange 
them like-for-like.  
Replacement Note:  
  
  
These torx screws must be tightened to at least 17 in.-lbs. If you do 
not have a torque driver, you will have to make sure these screws are tightened by hand 
FIRMLY, BUT NOT FORCIBLY. Or, purchase the service tool (076-0899) in order to ensure 
the thermal pipe is firmly mated with the top base. If the bottom housing is not securely 
attached to the base in this fashion, the CPU may overheat and become damaged. For 
more information, refer to “Thermal Paste Application’” in this chapter. Rotate the base so 
that the optical drive door is on the right.