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Maintenance
7.1
Introduction
This
section contains
information necessary
to
maintain
and
troubleshoot the
Mode!
707
A
Switching
Matrix.
Handling
and
cleaning procedures
are also included.
WARNING
The
servicing
procedures
in
this
section
are
intended only
for qualified electron-
ics
service personnel.
Do
not
attempt
to
perform
these
procedures
unless
you
are
qualified to
do
so.
Some
of the
proce-
dures
may
expose
you
to potentially
lethal
voltages
{>30V
RMS)
that could
result
in
personal
injury
or
death
if
nor-
mal
safety
precautions are not observed.
The
section
is
outlined as follows:
7.9
Mainframe
troubleshooting:
Outlines
trouble-
shooting procedures
for the
Model 707A.
7.10
Using an
extender
card: Explains
usage of an
extender card
to
access switching card
circuitry.
7.1
1
Cleaning: Gives
the
procedure
for
cleaning the back-
plane board
and
the fan
filter.
7.2
Line voltage sensing
The Model 707
A
operates
from
a
line
voltage
in
the
range of
100
to
240V,
at
a frequency
of
50
or
60Hz. Line
voltage
and
frequency
are automatically sensed, therefore there are
no
switches
to
set.
Check
to
see
that the line
power
in
your
area
is
compatible.
Perform
the following steps
to
connect
the
power
supply
to
the line
power
and
turn
it
on:
1.
Before plugging
in
the
power
cord,
make
sure the
front
panel
power
switch
is
in
the off (0) position.
2.
Connect
the
female end of
the
supplied
power
cord
to
the
AC
receptacle
on
the rear panel.
WARNING
The
power
cord supplied with
the
Model
707
A
contains
a
separate
ground
use
with
grounded
outlets.
When
proper
connections are
made,
instrument chas-
sis
is
connected
to
power
line
ground
through
the
ground
wire
in
the
power
cord. Failure
to
use a
grounded
outlet
may
result
is
personal
injury or
death
due
to electric
shock.
7.2
Line Voltage
Sensing: Provides a
description
of
set-
ting
the
instrument operating
voltage.
7.3
Fuse Replacement:
Gives
the
procedure
for
replacing
the
line
fuse located
on
the rear panel.
7.4
Fixed
Rack
Installation:
Lists
the
installation
instructions for
a
fixed
rack
mount
kit
for
a
Model
707A.
7.5
Disassembly: Covers
the
procedure
for
disassembling
the instrument,
including
circuit
board removal.
7.6
Backplane Jumpers:
Covers removal and
installation
of
the
backplane jumpers.
7.7
Battery
Replacement:
Outlines
the
procedure
for
replacing the lithium
battery.
7.8
Static-sensitive
Devices:
Covers
precautions neces-
sary
when
handling
static-sensitive parts
within the
instrument.
7-1
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