HP 15-f001xx HP 15 Notebook PC Maintenance and Service Guide - Page 73

Heat sink assembly

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Heat sink assembly Description Heat sink Spare part number 749040-001 NOTE: To properly ventilate the computer, allow at least 7.6 cm (3 in) of clearance on the left side of the computer. The computer uses an electric fan for ventilation. The fan is controlled by a temperature sensor and is designed to turn 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 requirements. Exhaust air is displaced through the ventilation grill located on the left side of the computer. Before removing the fan/heat sink assembly, follow these steps: 1. Turn off the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, and then shut it down through the operating system. 2. Disconnect the power from the computer by unplugging the power cord from the computer. 3. Disconnect all external devices from the computer. 4. Remove the battery (see Battery on page 27), and then remove the following components: a. Optical drive (see Optical drive on page 32). b. Service door (see Service door on page 28). c. WLAN module (see WLAN module on page 30). d. Memory module (see Memory module on page 29). e. Keyboard (see Keyboard on page 37). f. Top cover (see Top cover on page 40). g. Hard drive (see Hard drive on page 44). h. System board (see System board on page 55). Remove the heat sink assembly: 1. Turn the system board upside down, with the front toward you. 2. Disconnect the fan cable from the system board. 3. Following the 1, 2, 3, 4 sequence stamped into the fan/heat sink assembly, loosen the four Phillips M2.0×10.0 captive screws (1) that secure the fan/heat sink assembly to the system board. Component replacement procedures 63

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Heat sink assembly
Description
Spare part number
Heat sink
749040-001
NOTE:
To properly ventilate the computer, allow at least 7.6 cm (3 in) of clearance on the left side of
the computer. The computer uses an electric fan for ventilation. The fan is controlled by a temperature
sensor and is designed to turn 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 requirements. Exhaust air is displaced
through the ventilation grill located on the left side of the computer.
Before removing the fan/heat sink assembly, follow these steps:
1.
Turn off the computer. If you are unsure whether the computer is off or in Hibernation, turn
the computer on, and then shut it down through the operating system.
2.
Disconnect the power from the computer by unplugging the power cord from the computer.
3.
Disconnect all external devices from the computer.
4.
Remove the battery (see
Battery
on page
27
), and then remove the following components:
a.
Optical drive (see
Optical drive
on page
32
).
b.
Service door (see
Service door
on page
28
).
c.
WLAN module (see
WLAN module
on page
30
).
d.
Memory module (see
Memory module
on page
29
).
e.
Keyboard (see
Keyboard
on page
37
).
f.
Top cover (see
Top cover
on page
40
).
g.
Hard drive (see
Hard drive
on page
44
).
h.
System board (see
System board
on page
55
).
Remove the heat sink assembly:
1.
Turn the system board upside down, with the front toward you.
2.
Disconnect the fan cable from the system board.
3.
Following the 1, 2, 3, 4 sequence stamped into the fan/heat sink assembly, loosen the four Phillips
M2.0×10.0 captive screws
(1)
that secure the fan/heat sink assembly to the system board.
Component replacement procedures
63