Table of Contents
Advertisement
Power Distribution Boards
There are several power distribution boards in your server (see Chapter 4,
Service Information, in this handbook for removal instructions). They are
associated with the following components:
♦
Motherboard
♦
Removable media (5.25 Inch) drives
♦
Hard disk drives
♦
Electronics chamber cooling fans
The main purpose of these boards is to distribute electric power from a
single source to several different components. However, the motherboard
power distribution board and the cooling fan board have additional
functions. The following paragraphs explain the additional functions for
each board.
Motherboard Power Distribution Board
There are three additional functions for this board:
♦
The board receives the audio signals from the motherboard and the
system controller, mixes and amplifies them and sends them to the
loudspeaker.
♦
The board contains a 5V-3.3V DC to DC converter. This
accommodates the dual Pentium processor card, which requires
3.3V while all the other components connected to this board require
5V.
♦
The board also contains an internal temperature sensor.
Cooling Fan Board
This board is equipped with the following items:
♦
Three power connectors for the fans
♦
One microsensor for the side panel lock
♦
One power connector for the cable from the motherboard power
distribution board
♦
One thermistor mounted on the board which serves as an ambient
temperature sensor.
T e c h n i c a l I n f o r m a t i o n
OWNER'S HANDBOOK 5-49
Advertisement
Table of Contents
