HP 520 Maintenance And Service Manual page 62

Remove the fan assembly (3).
3.
Reverse this procedure to install the fan assembly.
NOTE:
To properly ventilate the computer, allow at least a 7.6-cm (3-inch) clearance on the left and
right sides of the computer.
The computer uses an electric fan for ventilation. The fan is controlled by a temperature sensor and is
designed to be turned on automatically when high temperature conditions exist. These conditions are
affected by high external temperatures, system power consumption, power management/battery
conservation configurations, battery fast charging, and software applications. Exhaust air is displaced
through the ventilation grill located on the left side of the computer.
54 Chapter 4 Removal and replacement procedures