Acer Aspire X3475 Service Manual page 41

Lay down the heat sink fan assembly, in an upright position, on top of the optical drivey, as shown below,
5.
then disconnect the fan cable from the mainboard connector.
Remove the heat sink fan assembly from the chassis then lay it down in an upright position—with the
6.
thermal patch facing upward. Do not let the thermal patch on the heat sink fan assembly touch the work
surface.
Use an alcohol pad to wipe off the thermal grease from both the heat sink and the processor.
7.
Chapter 3 33