Data General AViiON 5500 Series, Installing, Expanding, And Maintaining

Page: 109 / 192

Adding or replacing an I/O expansion board
7-5
014–002250–01
Adding or replacing an I/O expansion
board
This section describes how to add or replace I/O expansion boards.
Your base system includes one Small Computer System Interface
(SCSI) controller and one Ethernet LAN controller integrated on
the system board. AViiON 5500 series computers contain slots for
one or two I/O option boards that contain additional LAN or SCSI
controllers.
NOTE: AViiON 550 workstations with an 8–bit graphics controller
(the base configuration) support only one expansion board.
AViiON 550 series computers with a 24–bit graphics
controller do not support I/O expansion boards.
An I/O expansion board plugs into interboard connectors on the
system board; it is secured via system board and computer rear
panel screws.
Your configuration can include any combination of two I/O
expansion boards: one LAN, one SCSI, one of each, two LAN, or two
SCSI boards.
NOTE: Illustrations in this section show a configuration with one
LAN and one SCSI expansion I/O board.
Removing an I/O expansion board
If your system includes an I/O expansion board, you will need to
remove the board to replace it or to replace a failed system board.
Before you can remove any printed–circuit board, you must prepare
a worksite, remove the computer unit cover, and attach the ESD
wrist strap as described in Chapter 4.
CAUTION: Unless you are properly grounded, you can discharge static
electricity and damage components in the system.