Apple imac 17 inch User Manual

							
Neck Cable Retainer (under fan)

Tools 
This procedure requires the following tools: 
• Torx-10 screwdriver 
Part Location 
Note: View the document at a larger size to enlarge this graphic. 
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 fan. 
58 iMac (Flat Panel) Take Apart
 Neck Cable Retainer (under fan)  
						

							
Procedure 
1.	WIth the optical door oriented upward, remove the four screws connecting the plastic 
cable retainer to the chassis (Faraday cage). 
Note:  View the document at a larger size to enlarge this graphic. 
2.	Lift the plastic cable retainer from the chassis.  Note: The fan gasket is stuck to the 
back side of the plastic cable retainer. 
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. 
Neck Cable Retainer (under fan)	 iMac (Flat Panel)  Take Apart -
59 
						

							
Fan Gasket

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. 
• Remove the fan. 
• Remove the plastic cable retainer. 
60 iMac (Flat Panel) Take Apart
 Fan Gasket  
						

							
Procedure 
1.	Remove the plastic cable retainer and turn it over. Gently peel the fan gasket off the 
back of the cable retainer. 
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 Gasket	 iMac (Flat Panel)  Take Apart -
61 
						

							
 Cap, Neck Spoke Retainer

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 fan. 
• Remove the plastic cable retainer. 
62 iMac (Flat Panel) Take Apart
 Cap, Neck Spoke Retainer 
						

							
Procedure 
1.	The neck cables are highlighted below. Note the cable routing, including the blind 
mate connector orientation before removing the cap screws and neck cap. 
Note:  View the document at a larger size to enlarge the next two graphics. 
2. Loosen the three silver screws (circled below) to remove the neck cap. Lift the cap off 
the spokes.  Note: The two black screws keep the neck attached to the base. 
Cap, Neck Spoke Retainer	 iMac (Flat Panel)  Take Apart -
63 
						

							
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. 
64  iMac (Flat Panel) Take Apart
 Cap, Neck Spoke Retainer  
						

							
Blind Mate Connector

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 fan. 
• Remove the plastic cable retainer. 
• Remove the cap neck spoke retainer. 
Blind Mate Connector iMac (Flat Panel)  Take Apart -
65 
						

							
Procedure 
1.	Remove the two blind mate screws. Replacement Note: The tab on the blind mate 
connector faces inward. 
2.	Lift the blind mate connector off the chassis.  Note: The blind mate connector is part of 
the neck assembly. 
Replacement Notes: 
Blind Mate Connector:  Make sure to replace the blind mate connector into the chassis 
with the tab facing inward (toward the fan). And, when tightening the screws, the blind 
mate connector should have some play; do not tighten down so it doesn’t move at all. 
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. 
66  iMac (Flat Panel) Take Apart	
 Blind Mate Connector  
						

							
Chassis (Faraday Cage)

Tools 
This procedure requires the following tools: 
• Torx-10 screwdriver 
• Torx-8 screwdriver for the logo screw 
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 fan. 
Chassis (Faraday Cage) iMac (Flat Panel)  Take Apart -
67