Apple imac 17 inch User Manual

							
Modem

Tools 
This procedure requires the following tools: 
• Torx-8 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. 
18 iMac (Flat Panel) Take Apart
 RJ-11 Modem Filter Board  
						

							
Procedure 
1. Remove two screws and disconnect the cable. 
2. Lift the modem from the connector on the logic board. 
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 minim\
um 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 the 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 could cause the computer to overheat and da\
mage 
internal components. 
Refer to the topic, “Thermal Paste Application” for detailed infor\
mation. 
RJ-11 Modem Filter Board  iMac (Flat Panel)  Take Apart -
19 
						

							
Memory (factory-installed)

Tools 
This procedure requires the following tools: 
• No tools are required 
Part Location 
Note: The factory-installed memory slot is identified as Slot J13 by Apple Hardware Test 
and Apple System Profiler. 
Preliminary Steps 
Before you begin, do the following: 
• Position the computer in the service stand. 
• Remove the user access plate. 
• Remove the bottom housing. 
20  iMac (Flat Panel) Take Apart
 Memory (factory-installed)  
						

							
Procedure 
1. Push down on the ejector tabs to release the memory module. 
2. Pull the memory up and out of the slot. 
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 minim\
um 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. 
Memory (factory-installed)  iMac (Flat Panel)  Take Apart -
21 
						

							
Battery

Tools 
This procedure requires the following tools: 
• No tools are required 
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. 
22 iMac (Flat Panel) Take Apart
 Battery  
						

							
Procedure 
1. Using a flatblade screwdriver, gently pry the battery from the battery holder. 
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 minim\
um 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 the 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 could cause the computer to overheat and da\
mage 
internal components. 
Refer to the topic, “Thermal Paste Application” for detailed infor\
mation. 
Battery  iMac (Flat Panel)  Take Apart -
23 
						

							
Logic Board

Tools 
This procedure requires the following tools: 
• Phillips #2 screwdriver (for the plastic screw) 
• Torx-15 screwdriver 
Part Location 
Note: The battery, RJ-11 board, AirPort card, modem, I/O port covers, and memory (on 
the top and the bottom of the logic board) need to be removed from the logic board before 
returning the board to Apple for service. 
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 RJ-11 board. 
24  iMac (Flat Panel) Take Apart
 Logic Board  
						

							
Procedure 
1. Remove the three metal torx screws and the one plastic screw. 
Logic Board iMac (Flat Panel)  Take Apart -
25
 
						

							
2.	Grab the logic board by the battery retainer and the hard drive connector. Lift the 
board and pull back to release the board from the bottom housing and I/O ports.  Note: 
The I/O port covers may come out with the logic board when it’s removed. 
3.	Remove the I/O port covers from the logic board. 
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 the 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 could cause the computer to overheat and da\
mage 
internal components. 
Refer to the topic, “Thermal Paste Application” for detailed infor\
mation. 
Warning:  Whenever the logic board is separated from the bottom housing, you must 
install new thermal pads to three surfaces on the bottom housing. The thermal pads help 
cool components on the logic board. Failure to apply these pads whenever the logic board 
26  iMac (Flat Panel) Take Apart	
 Logic Board  
						

							
is separated from the bottom housing could cause these parts to overheat. Short term 
separation, where the thermal pads are not handled excessively 
(an exception would be 
if you are simply testing the logic board and only detach it for a few m\
inutes)
, 
does not require replacement. Refer to “Thermal Pad Installation” in this chapter for 
detailed information. 
Important:  Diagnostic service cables allow the unit to run while the bottom housing is 
open (as shown above). However, the computer cannot run for more than five minutes with 
the bottom housing open. If it is open longer, the CPU may overheat and become 
damaged. 
Logic Board  iMac (Flat Panel)  Take Apart -
27