Clear-Com RS-100A Troubleshooting guide

RS-
00A
Belt-pack
Station
INSTRUCTION
and
SERVICE
MANUAL
C)
lear-Come
Intercom
systems
0
1111 1 7th
Street
* San Francisco,
California
94107
* 415-861-6666
100A/12-82
ORI

CLEAR-COM MODEL RS-100A REMOTE BELT-PACK STATION
OPERATING
AND SERVICE
INFORMATION
I. INTRODUCTION TO THE BELT-PACK STATION
The Clear-Com RS-100A
is a portable pedance, as many as 100 units may
remote intercom
station,
housed in
be connected
in one system,
over
a 16-gauge,
stainless-steel
case
distances of
up to one mile.
that provides strength
and durabil-
ity. The
unit attaches
to your
A Visual Call
Signal is standard
belt with
a sturdy stainless-steel
on
Clear-Com equipment,
and allows
clip.
the user to visually attract the
attention of operators who have
The RS-100A
contains a
headset removed their
headsets,
amplifier that provides sufficient
output
to drive one Clear-Com
head- The RS-100A
also provides a
unique
set to a level greater than 110 dB sidetone adjustment, which allows
SPL with no distortion. It can
the user to vary the level of
drive
two headsets
if connected
his/her
voice as heard
in his/her
with a suitable "I"-cord.
headset.
This control need only
be
set once, even
if other Stations
Because of the Station s low subsequently join or leave the
current draw and high bridging im- intercom network.
II. INSTALLATION
OF THE BELT-PACK
Interconnect Cable handset) should have the following
Use standard 2-conductor microphone
characteristics--
cable
to interconnect
Stations.
Microphone
type:
dynamic
Unshielded cable may be used where Impedance: 150-250 ohms
AC interference
is not
a problem.
Output
Levrl:
-55 dB
We recommend
rubber-insulated
and
Headphone Type:
dynamic
jacketed cable,
such as:
Output Impedance:
300-2000 ohms
Belden
8413 or equivalent (24 ga.,
The headset connector pin-out
is:
stranded conductors) for lines
running up to 500 feet in length; Pin 1: mic common
Pin 2: mic hot
Belden 8412
or equivalent (20 ga.,
Pin
3: headphone common
stranded conductors) for lines Pin 4: headphone hot
running 500-5000 feet in length;
NOTE: Do NOT connect headphone
Belden 8428 or equivalent (18 ga., ground and mic ground together at
low-capacity) for lines greater any point.
than 5000 feet in length.
Connections
Headsets Bring mic cable from the Main
Headset connectors in Clear-Com Station or Power Supply and plug
equipment are XLR-type, 4-pin male into D3E connector labelled "input"
connectors. on belt-pack. The pin-out is:
Pin 1: Common
To insure proper level and Pin 2: +28 volts
performance, the headset (or Pin 3: Audio

The
D3M
connector
labelled
"exten-
In
locations where sending
DC power
sion"
provides
an internal
loop-
is
not
convenient,
the RS-100A
can
through,
allowing
you
to
daisy-
be operated
at
12
volts
using
a
chain
additional Stations
along
one
portable
battery
pack
and termina-
stretch
of cable.
ting
network,
such
as
Clear-Com
s
Model BP-10
Battery
Pack.
NOTE To prevent
shock hazard,
ground
loops,
and
noises,
NEVER
After
completing
all
connections,
connect
Pin
1 (common)
directly
to
plug
in
the headset
and
turn up
the
the
station
chassis.
In addition,
volume
The
Station
is now
ready
to
never
connect
Pin 1
to the
shell
of
operate.
the mic
cable.
III.
OPERATING CONTROLS
The switch
labelled Off/Mic/Call
on the side of
the belt-pack, and
turns
the
headset
mic ON
and OFF,
is used
to
vary
the amount
of your
and activates
the Call signal
for
voice as
hear-1 in the
headset.
It
all
Stations
on the
same
channel.
does not
affect
the level
of inco-
Momentarily
press this
switch to
ming or outgoing
signals, and
is
the
"Call" position
to signal
other
set at the
factory
to be approxi-
stations.
Their
Call lights
will mately
6 dB
lower
than
incoming
stay
on for
as long
as
the switch signals.
To
re-set
it,
locate
the
is depressed. When
the
switch
is
unmarked
hole
(which
contains
a
released,
it automatically
returns
trimpot).
Plug
in your
headset,
to
the mic-on
position.
insert
a small-bladed
screwdriver
through the hole, and
engage the
The Call Light lights
up to attract
slot on the trimpot. Turn
up the
your attention
when another
Sta-
headset
volume all
the
way, and
tion
(connected
to
the same
chan-
start
talking
to yourself
while
nel)
activates
the Call
signal.
slowly turning
the
screwdriver.
A
null point will be found where
you
The Headset
Volume knob adjusts
the can
barely hear yourself;
the pro-
audio
level in
your earphone(s).
per setting
is anywhere
to the left
of the null.
The Sidetone adjustment is
located
IV. SERVICE
If
the RS-100A needs
to be chassis.
serviced,
the
PC
board may
be
5) Unplug
connector
from
PC board.
removed
as follows:
Gently
remove
PC board from
chassis.
1) Remove
the two
screws
on the
cover
of the
belt-pack.
When
re-installing
the
PC board,
2) Remove Volume
knob
and nut.
reverse
the above procedure. Make
3)
Remove nut
from Off/Mic/Call
sure
the two rubber bumpers
are
switch
installed
on the PC board,
as they
4) Remove
the two flat-head
screws
provide proper
shock mounting.
holding the PC board
to the

V.
PARTS
LISTING
Part
#
Descriction
Reference
Designator
710052 Remote
Station
PC
Module
---
210013
Headset Connector,
D4M
J-3
210002
Input
Connector,
D3F
J-1
210003
Extension Connector,
D3M
J-2
510020 Switch,
toggle,
3-position
S-1
390000
Lamp
Assembly
I-1
390001
Lamp,
28v,
#327
---
240015
Knob,
black,
1/2"
P-2
250041
Belt-clip,
stainless-steel
---
cc/
R
01.c
A/IC~~~~~~I
PS-/OOA
BELOCK
DIAGRAM
0
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,ttctRH

RS-100A
SPECIFICATIONS
AMPLIFIER
DESIGN:
Solid-state,
integrated
circuit
amplifiers.
Current-limited
and
short-circuit-protected,
with
reverse
polarity
protection.
MICROPHONE
PRE-AMPLIFIER
GENERAL
Mic
Input:
200
ohms, dynamic
Station
Bridging
Mic Pre-amp
Gain:
30 dB,,
adjustable
Impedance:
>20k
ohms (200-10k
Hz)
Max Input
Before
Clipping:
-26
dB
Line Level:
-1
dB max.
Freq.
Response:
250-12k
Hz,
+5 dB
Side
Tone Adjust:
35 dB null-full
on
Signal
Voltage:
11v DC
on audio
line
Call Light
HEADPHONE
AMPLIFIER
Sensitivity:
4 volts
Load
Impedance
Range:
300-2k
ohms
Signal-to-Noise:
75
dB
Output
Level:
+20
dBm
Equiv.Input
Noise:
-121 dB
(before clipping)
Power
Headset
Level:
>110
dB SPL
Requirements:
10 ma
quiescent,
12 ma
(with
standard
Clear-Com
headset)
avg. talk,
45 ma signaling
Distortion:
<0.1%
THD e 1
kHz
DC Voltage
Range:
12-32v,
28v nominal
Amplifier
Gain:
40 dB
Frequency
Response:
150-18k
Hz. ±2dB
PHYSICAL
CHARACTERISTICS
Dimensions:
2.75"
x 4.9" x 1.6"
CONNECTORS
Weight:
1
pound
Headset:
(1) 4-pin
male, D4M
Ambient
Operating
Line:
(1)
3-pin male,
(1) 3-pin
female
Temperature:
0-6Oo
C (32-140o
F)
D3M/D3F
Humidity:
0-90%
relative
humidity
HEADSET
"Y"-CORD
Clear-Com
can provide
you with
Model
fC-100, a
device that
allows
you to plug
two headsets
into
one beltpack.
Alternatively,
you
may also
construct
your own
Y-cord;
we recommend
you
use Belden
8416
or equivalent,
or Belden
8734 or
equivalent.
Refer
to the
diagram
below for
proper connections.
Please
note that
when using
two headsets,
the
output
level will
be decreased
by
3 dB.
HEADSET "Y'CABLE
CONNECTIONS
A4M
A4F
N. H ilcsa3
SHIELDED A4M
CAUTION:
DO NOT CONNECT
P,
MCGROUND &HEADPHONE PVIN:
I ICGROUND
GROUND
TOGETHER AT PIN2: iC HOT
Pln H HEADPHONE
HOT

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