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Maintenance and Service Guide 1–11
1.4 Desi gn Ove rview
This section presents a design overview of key parts and features
of the expansion base. Refer to Section , “Illustrated Parts
Catalog,” to identify replacement parts, and Section , “Removal
and Replacement Procedures,” for disassembly steps.
The expansion base provides the following device connections:
■ Expansion cable
■ S/PDIF (Sony/Philips Digital Interface) audio connector
■ Audio-out (headphone) jack
■ Composite out
■ RJ-11 (modem) connection (from wall to expansion base)
■ RJ-11 (modem) connection (from expansion base to
computer)
■ RJ-45 (network) port
■ USB 2.0 connectors (3)
■ S-Video-out
■ Serial port
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CAUTION: To properly ventilate the expansion base, allow at least a
7.6-cm (3-inch) clearance on the left and right sides of the unit.
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.