Apple imac 17 inch User Manual

							
Procedure 
1.	Remove the four screws on the power supply metal shield. Set the shield aside. 
Important:  The two screws near the door hinge are shorter than the other power 
supply screws. Failure to replace the shorter screws to their correct location will 
scratch the top housing. See step 4, Replacement Note in the Power Supply section 
for a picture. 
48  iMac (Flat Panel) Take Apart	
 Optical Drive Door  
						

							
2. Slide the plastic door frame off the chassis. 
3. Carefully remove the two door springs with a needlenose pliers. 
Optical Drive Door iMac (Flat Panel)  Take Apart -
49
 
						

							
4. Remove the door hinge screws. 
5. Open the door open. 
50 iMac (Flat Panel) Take Apart
 Optical Drive Door  
						

							
6. Slide the door and hinge off the frame. Remove the door from the base. 
Warning: Whenever the bottom housing is opened for service, you must do two things: 
1.You must clean the original thermal film from the surfaces joining the\
 thermal 
interface layer and reapply thermal paste to the thermal pipe. 
2. You must tighten the four torx screws on the bottom housing to a minimu\
m of 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 th\
e top base. If the 
bottom housing is not securely attached to the base in this fashion, the\
 CPU may 
overheat and become damaged. Failure to follow either of these steps cou\
ld cause 
the computer to overheat and damage internal components. 
Refer to the topic, “Thermal Paste Application” for detailed infor\
mation. 
Optical Drive Door  iMac (Flat Panel)  Take Apart -
51 
						

							
Speaker, Internal

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. 
52 iMac (Flat Panel) Take Apart
 Speaker, Internal  
						

							
Procedure 
1.	Loosen the two screws enough to slide the speaker off the metal posts. Disconnect 
the speaker cable. 
Warning:  Whenever the bottom housing is opened for service, you must do two things: 
1.You must clean the original thermal film from the surfaces joining the\
 thermal 
interface layer and reapply thermal paste to the thermal pipe. 
2. You must tighten the four torx screws on the bottom housing to a minimu\
m of 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 th\
e top base. If the 
bottom housing is not securely attached to the base in this fashion, the\
 CPU may 
overheat and become damaged. Failure to follow either of these steps cou\
ld cause 
the computer to overheat and damage internal components. 
Refer to the topic, “Thermal Paste Application” for detailed infor\
mation. 
Speaker, Internal	 iMac (Flat Panel)  Take Apart -
53 
						

							
Fan

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. 
• Remove the bottom housing. 
• Remove the drive carrier assembly. 
54 iMac (Flat Panel) Take Apart
 Fan  
						

							
Procedure 
1. Remove the two fan screws and disconnect the fan connector. 
2. Lift the fan out of the chassis (Faraday cage). 
Warning: Whenever the bottom housing is opened for service, you must do two things: 
1.You must clean the original thermal film from the surfaces joining the\
 thermal 
interface layer and reapply thermal paste to the thermal pipe. 
2. You must tighten the four torx screws on the bottom housing to a minimu\
m of 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 th\
e top base. If the 
bottom housing is not securely attached to the base in this fashion, the\
 CPU may 
overheat and become damaged. Failure to follow either of these steps cou\
ld cause 
the computer to overheat and damage internal components. 
Refer to the topic, “Thermal Paste Application” for detailed infor\
mation. 
Fan  iMac (Flat Panel)  Take Apart -
55 
						

							
Power Supply Insulators

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. 
• Remove the bottom housing. 
• Remove the drive carrier assembly. 
• Remove the power supply. 
56 iMac (Flat Panel) Take Apart
 Power Supply Insulators  
						

							
Procedure 
1.	Carefully pull the insulators from the chassis (Faraday cage). These are attached to 
the chassis with double-sided tape. 
Warning:  Whenever the bottom housing is opened for service, you must do two things: 
1.You must clean the original thermal film from the surfaces joining the\
 thermal 
interface layer and reapply thermal paste to the thermal pipe. 
2. You must tighten the four torx screws on the bottom housing to a minimu\
m of 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 th\
e top base. If the 
bottom housing is not securely attached to the base in this fashion, the\
 CPU may 
overheat and become damaged. Failure to follow either of these steps cou\
ld cause 
the computer to overheat and damage internal components. 
Refer to the topic, “Thermal Paste Application” for detailed infor\
mation. 
Power Supply Insulators	 iMac (Flat Panel)  Take Apart -
57