Sun Microsystems Desktop SunStation Sun-3/75 Manual page 45

Basic
Hardware
Configuration
and
Options
CAUTION Some
of the devices
on
the
Sun-3/75
boards
are very
sensitive to electro-
static
discharge,
such as
can be
built
up
in
the
human body by walking
across
a carpet.
Extreme care
must be used
when
handling any
of the
boards.
This
chapter describes the
hardware
configuration for the Sun-3/75, including
monitor, keyboard,
mouse, and optional
memory expansion.
Basic
configuration
of
the
Sun-
3/75
is
with a
2060
CPU
board.
To
this
basic
model you
may
add
a
2061 expansion board,
an
SCSI board,
a
71
Mbyte
disk
subsystem, or a
blank
VME(2)-to-VME(3)
adapter board.
In general, the
Sun-3/75
is
shipped with
its
board(s) already installed.
However,
if
you
arc
upgrading
a
Sun-3/75,
you can use
this
section
to
install
the
boards.
3.1.
The
Sun-3/75
Configuration
CAUTION
Turn
off
the
power and disconnect the
power
cord before
inserting
or
removing any boards.
Devices
on the
Sun-3/160 boards
are very sensitive to
electro-static
discharge.
Extreme care
must be used
when handling
any of the boards.
3.2.
Installing
or
Removing
All
boards
are inserted
or extracted
from
the
back of
the
Sun-
3/75.
Boards
To rcm0V
e a
board,
unscrew the four size
#0 Allen screws (one
at
each
comer
of
the
board)
retaining the
board
to
the chassis.
Then
flip
the
two
levers
outward
to
loosen the
board
for
removal.
The board
will slide right out.
To
install
the
board, slide
it
in
on
its
sliderails
and
make
certain that
it i.v
se^ureh
seated in the
backplane. Flip
the
two
levers
inward
to
lock the
board
in
place.
Screw
in
the
four size
#0
Allen screws
that
fasten the
board
to
the chassis.
#sun
XT
microsystems
31
Revision
A
of 31
September 1986