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1–16 Maintenance and Service Guide
Product Description
1.5 Design Overview
This section presents a design overview of key parts and features
of the computer. Refer to Chapter 3, “Illustrated Parts Catalog,”
to identify replacement parts, and Chapter 5, “Removal and
Replacement Procedures,” for disassembly steps. The system
board provides the following device connections:
■ Memory expansion board
■ Hard drive
■ Display
■ Keyboard/TouchPad or pointing stick
■ Audio
■ Intel Mobile Pentium 4 processors with SpeedStep
technology
■ Fan
■ PC Card
■ Modem or modem/NIC
The computer uses an electrical 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 applications.
Exhaust air is displaced through the ventilation grill located on
the left side of the computer.
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CAUTION: To properly ventilate the computer, allow at least a
3-inch (7.6 cm) clearance on the left and right sides of the
computer.
268135-002.book Page 16 Thursday, October 24, 2002 4:10 PM