Cpu Board - Sun Microsystems Desktop SunStation Sun-3/75 Manual

32
Sun-3/75
Hardware
Installation
Manual
3.3.
Board Arrangements
Figure 3-1
Sun-3/75
CPU
Board
WARNING
I/O Connectors
Board arrangements
for the
Sun-
3/75
look
like
this:
Board Arrangements and
Options for Sun-3 175
There
is
a Lithium
Battery
(BBCV2),
Matsushita
Electric
Type
No. BR2325,
located
on
the Sun-3/75
CPU
Board. This
battery
is
NOT
a
field
replaceable
part.
The
battery
is
marked
as
follows:
"Warning
—
Replace
battery
with
MATSUSHITA ELECTRIC
or
PANASONIC
Part No.
BR2325
only."
The
battery
may
explode
if
mistreated.
Do
not dispose of the battery
in
fire.
Do
not disassemble or attempt
to
recharge
it
The 2060
CPU
(Central Processing Unit) board
is
installed in the
lower
slot
of the
Sun-3/75.
It
contains the
68020 CPU,
a
minimum
of
two megabytes
of
memory,
I/O connections, Ethernet
controller,
and
monochrome
video
circuitry.
Three
jacks connect
the
2060
board
to the
backplane
inside the
Sun-3/75
base,
and
five
I/O connectors
are at
the opposite end of
the board.
The
rear
of
the
CPU
board
is
terminated
in five
I/O connectors. In sequence,
as
they
are aligned
on
the board, they
are:
asa
Revision
A
of
31 September 1986