HP Tx2635us HP Pavilion tx2500 Entertainment PC - Maintenance and Service Guid - Page 76

Fan/heat sink assembly

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Fan/heat sink assembly Description Fan/heat sink assembly (includes thermal paste and thermal pads) Spare part number 487925-001 NOTE: To properly ventilate the computer, allow at least a 7.6-cm (3-inch) clearance on the right side and rear panel 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. Shut down 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 all external devices connected to the computer. 3. Disconnect the power cord. 4. Remove the battery (see Battery on page 39). 5. Remove the following components: a. Hard drive (see Hard drive on page 41) b. Memory module compartment cover (see Memory module on page 44) c. Optical drive (see Optical drive on page 43) d. Keyboard (see Keyboard on page 49) e. Switch cover (see Switch cover on page 51) f. Display assembly (see Display assembly on page 53) g. Top cover (see Top cover on page 56) h. Power switch assembly (see Power switch assembly on page 59) i. System board (see System board on page 62) Remove the fan/heat assembly: 1. Disconnect the fan cable (1) from the system board. 2. Remove the four Phillips PM2.0×4.0 screws (2) that secure the fan/heat sink assembly to the system board. 68 Chapter 4 Removal and replacement procedures

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Fan/heat sink assembly
Description
Spare part number
Fan/heat sink assembly (includes thermal paste and thermal pads)
487925-001
NOTE:
To properly ventilate the computer, allow at least a 7.6-cm (3-inch) clearance on the right side
and rear panel 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.
Shut down 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 all external devices connected to the computer.
3.
Disconnect the power cord.
4.
Remove the battery (see
Battery
on page
39
).
5.
Remove the following components:
a.
Hard drive (see
Hard drive
on page
41
)
b.
Memory module compartment cover (see
Memory module
on page
44
)
c.
Optical drive (see
Optical drive
on page
43
)
d.
Keyboard (see
Keyboard
on page
49
)
e.
Switch cover (see
Switch cover
on page
51
)
f.
Display assembly (see
Display assembly
on page
53
)
g.
Top cover (see
Top cover
on page
56
)
h.
Power switch assembly (see
Power switch assembly
on page
59
)
i.
System board (see
System board
on page
62
)
Remove the fan/heat assembly:
1.
Disconnect the fan cable
(1)
from the system board.
2.
Remove the four Phillips PM2.0×4.0 screws
(2)
that secure the fan/heat sink assembly to the
system board.
68
Chapter 4
Removal and replacement procedures