Apple IMAC Service Source - Page 46

There should be no air pockets.

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Procedure 1. Remove the old thermal pads from the bottom housing. Note: If you don't see the two thermal pads on the bottom housing, check the under side of the logic board. The thermal pads may stick to the logic board. Always remove the old thermal pads, and install new pads if you are taking the unit apart to this level. 2. Using the thermal pad kit, remove the clear protective backing from the new thermal pads. 3. Place the new thermal pads on the bottom housing. Press down on the blue protective backing to make sure the thermal pad has even contact with the bottom housing. There should be no air pockets. 4. Remove the blue protective backing from the new thermal pad. Note: Avoid unnecessary contact with either side of the thermal pad as dirt and body oils reduce the thermal pad's conductivity. 5. Slide the logic board back into the bottom housing (make sure the I/O port covers are on the logic board). Thermal Pad Installation iMac (USB 2.0) Take Apart - 37

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iMac (USB 2.0)
Take Apart -
37
Thermal Pad Installation
Procedure
1.
Remove the old thermal pads from the bottom housing.
Note:
If you don’t see the two
thermal pads on the bottom housing, check the under side of the logic board. The
thermal pads may stick to the logic board. Always remove the old thermal pads, and
install new pads if you are taking the unit apart to this level.
2.
Using the thermal pad kit, remove the clear protective backing from the new thermal
pads.
3.
Place the new thermal pads on the bottom housing. Press down on the blue protective
backing to make sure the thermal pad has even contact with the bottom housing.
There should be no air pockets.
4.
Remove the blue protective backing from the new thermal pad.
Note:
Avoid
unnecessary contact with either side of the thermal pad as dirt and body oils reduce
the thermal pad's conductivity.
5.
Slide the logic board back into the bottom housing (make sure the I/O port covers are
on the logic board).