Service manual

II-E.
Mounting
The
MS-400A
The
MS-400A
is
designed
to
mount
in
a
rate,
as
the
front
panel
extends
only
a
standard
19"
rack,
using
3.5"
vertical-
very
small
amount
beyond
the
top
and
ly.
It
can
also
mount
in
a
console
or
bottom
of
the
chassis.
See
page
15
for
sit
atop
a
shelf
if
necessary.
The
mounting
dimensions.
Before
mounting
station
extends
9"
back
from
the
front
the
station,
insure
that
any
special
panel,
but
avoid
sharp
bends
in
cabling
features
you
require
have
been
set
up
and
allow
an
additional
3"
behind
the
(ISO
or
IFB
operation
or
split-feed
unit.
If
mounting
the
station
in
a
headphones).
console,
the
cut-out
must
be
very
accu-
.
Il-F.
Station
Connection
Once
you
determine
the
configuration
of
or
all
of
the
thee
wiring
methods
de-
your
intercom
system,
decide
upon
a
scribed
in
Section
IID.
Pin
assign-
location
for
the
main
station.
Then:
ments
for
the
rear
panel
intercom
XLR
g
connectors
are:
Pin
1,
COMMON;
Pin
2,
1)
Position
the
unit
near
a
source
of
+VDC;
Pin
3,
INTERCOM
AUDIO.
115
or
230
VAC
(power
consumption
is
80
watts
maximum).
4)
Route
cables
away
from
heavy
AC
power
sources
such
as
lighting
panels
or
2)
Use
standard
multi-pair
shielded
ca-
electric
motors.
ble
described
in
Section
IIB._
5)
In
permanent
installations,
cables
3)
Route
all
cables
from
the
remote
should
be
installed
in
accordance
stations
to
the
main
station.
Use
any
with
approved
local
building
codes.
.
II-G.
Set-Up
After
connecting
the
MS-400A
to
the
Next,
check
that
the
program
gain
switch
remote
stations,
set
the
channel
access
is
set
to
match
the
level
of
the
in-
(talk
presets)
and
termination
switches.
going
program
(mic-
or
line-level).
IMPORTANT:
Before
turning
on
the
unit,
Finally,
adjust
operating
controls
for
be
sure
that
the
line
voltage
switch
is
desired
operation
and
comfortable,
Ie-
correctly
set,
and
that
the
fuse
is
the
vels.
proper
rating!
14