Apple imac usb 2 0 User Manual
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![Page 67
58 - iMac (USB 2.0) 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 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...](http://img.usermanuals.tech/thumb/462/38804/w64_imac-usb-2-0-66.png "Page 67
58 - iMac (USB 2.0) 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 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...")
![Page 70
iMac (USB 2.0) Take Apart - 61
Fan 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...](http://img.usermanuals.tech/thumb/462/38804/w64_imac-usb-2-0-69.png "Page 70
iMac (USB 2.0) Take Apart - 61
Fan 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...")
![Page 72
iMac (USB 2.0) Take Apart - 63
Power Supply Insulators
Procedure
1. Carefully pull the insulators from the chassis (Faraday cage). These are attached to
the chassis with double-sided tape.
2. Note: The insulators on the 20-inch iMac (USB 2.0), 922-6217 and 922-6214, \
are
different from the insulators used on the 15-inch and the 17-inch iMac (USB\
2.0)
computers.
Warning: Whenever the bottom housing is opened for service, you must do two things:
1.You must clean the original thermal film from...](http://img.usermanuals.tech/thumb/462/38804/w64_imac-usb-2-0-71.png "Page 72
iMac (USB 2.0) Take Apart - 63
Power Supply Insulators
Procedure
1. Carefully pull the insulators from the chassis (Faraday cage). These are attached to
the chassis with double-sided tape.
2. Note: The insulators on the 20-inch iMac (USB 2.0), 922-6217 and 922-6214, \
are
different from the insulators used on the 15-inch and the 17-inch iMac (USB\
2.0)
computers.
Warning: Whenever the bottom housing is opened for service, you must do two things:
1.You must clean the original thermal film from...")
![Page 75
66 - iMac (USB 2.0) Take Apart
Fan Retainer Bracket (under fan)
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...](http://img.usermanuals.tech/thumb/462/38804/w64_imac-usb-2-0-74.png "Page 75
66 - iMac (USB 2.0) Take Apart
Fan Retainer Bracket (under fan)
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...")
62 - iMac (USB 2.0) Take Apart Power Supply Insulators Power Supply Insulators Tools No tools are required for this procedure. Part Location Note: Insulator color and transparency may vary from those shown above. 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.
iMac (USB 2.0) Take Apart - 63 Power Supply Insulators Procedure 1. Carefully pull the insulators from the chassis (Faraday cage). These are attached to the chassis with double-sided tape. 2. Note: The insulators on the 20-inch iMac (USB 2.0), 922-6217 and 922-6214, \ are different from the insulators used on the 15-inch and the 17-inch iMac (USB\ 2.0) computers. 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.
64 - iMac (USB 2.0) Take Apart Fan Retainer Bracket (under fan) Fan Retainer Bracket (under fan) 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.
iMac (USB 2.0) Take Apart - 65 Fan Retainer Bracket (under fan) Procedure 1. Remove the four screws connecting the fan bracket to the chassis (Faraday cage). 2. Lift the fan bracket out of the chassis. Note the orientation of the neck cables (see below) in the fan bracket before removing the cables. For orientation purposes, the drive door would be on the right.
66 - iMac (USB 2.0) Take Apart Fan Retainer Bracket (under fan) 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 - 67 Fan Gasket 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 fan retainer bracket.
68 - iMac (USB 2.0) Take Apart Fan Gasket Procedure 1. Remove the fan retainer bracket and turn it over. Gently peel the fan gasket off the back of the fan bracket. 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 - 69 Cap, Neck Spoke Retainer 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.
70 - iMac (USB 2.0) Take Apart Cap, Neck Spoke Retainer Procedure 1. Before removing the neck cap screws, note the cable routing, including the location of the empty spoke. 2. Note: There are five screws on the neck cap. For this step, remove only the three silver screws and the neck cap. (The two black screws secure the neck to the base.)
iMac (USB 2.0) Take Apart - 71 Cap, Neck Spoke Retainer 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.