Telex IC-1 User manual

IC-I AND IC-I F
GENERAL DESCRIPTION
The IC-1 and IC-1Fare single-channel, single-
line intercom stations designed for use with
dynamic headsets.
The IC-1 is a compact, lightweight unitwhich
may be worn on the user's belt, or mounted
permanentlyto other equipment. Parallel-wired
male and female XLR-3 connectors, mounted on
the rear panel, allow unitsto be daisy-chained
using prefabricated intercom cables.
The IC-1
F is aflush-mount version of the IC-1
designed for permanent installation in an
electrical pull box. The unit is connected tothe
intercom system by meansof combination wire-
wrap, screw clamp terminals.
Boththe IC-1 and IC-1Fare available with and
without light signalling capability. The light
signal versions are distinguished by the presence
of a Call Indicator Light onthe front panel. For
purposes of documentation, the light signal
versions will be designated the IC-1/LS (an IC-1
with lightsignalling, and the IC-1F/LS (an IC-1F
with lightsignalling).
SPECIFICATIONS
Specifications apply to all versions unless
otherwise noted.
Frequency Response:
Transmit: 150-7,000 Hz t1,-3 dB.
Receive: 180-6,000
Hz +1, -3 dB.
Equivalentlnput Noise:
Mic Input: 2 microvolts (-116dBV)
150-7,000
HZ.
Input Level:
Mic: 5 millivolts nominal, 12 millivolts
maximum.
Line: 1volt (0dBM) nominal, 4 volts (12dBM)
maximum.
lnput Impedance:
Mic: Greater than 5,000 ohms. (Unit is
designed for use with 50-600 ohm phones).
Line: Greater than 10,000 ohms.
Output Impedance:
Phones: 60 ohms (Unit is designed for
use with 150-600ohm phones.)
Output Power:
Phones: 75 milliwatts into 150ohms.
Line: 10milliwatts (+I0 dBM).
Total Harmonic Distortion:
Transmit: 1%at 10dBM.
Receive: 1% at 75 milliwatts.
Common Mode Rejection:
Line: 40 dB at 60 Hz.
Power Requirements:
Voltage: 24 Vdc nominal. Unitwill
operate on 12-30 Vdc.
Current: Nosignal
- 8 milliamps (IC-1, IC-IF),
12 milliamps (IC-1/LS, IC-1F/LS).
Average talk
- 12 milliamps (IC-1, IC-IF),
20 milliamps (IC-1/LS, IC-1F/LS).
Signalling
- 30 milliamps (IC-I/LS, IC-1F/LS).
Dimensions(withoutexternal connectors):
IC-1, IC-I/LS: 1.75 inches (44.45 mm) high x
3.0 inches (76.2 mm) wide x 5.39 inches
(136.9 mm) long.
IC-IF, IC-1F/LS: 4.5 inches (114.3 mm) highx
4.62 inches (117.35 mm) wide x 2.5 inches
(63.5 mm) deep behindfront panel. If unit is
installed using screw-clamp terminals, wire-
wrap pins may be cut off and depth reduces to
2.15 inches (54.61 mm).
Weight:
IC-1, IC-1/LS: 1.5 Ibs (0.51 kg)
Connectors:
IC-1/LS: One XLR-4M for headset
connection. One XLR-3M and one XLR-3F,
wired in parallel, for intercom line
connection.
IC-1F, IC-1F/LS: One XLR-4M for headset
connection. Three combination screw-clamp,
wire-wrap terminals for intercom line
connection. Screw-clamp terminals accept
No. 22 through No. 14AWG stranded or solid
wire.

INSTALLATION
IC-1 and IC-11LS
Permanent installation may be accomplished by
removing the belt clip and utilizingthe threaded
belt clip mounting holes along with the additional
threaded hole inthe case to secure the unit to
other equipment. These holes accept No. 6-32
machine screws. Screws may extend 3/16-inch
into unit. These units may also be rack mounted
using an RM-13 Rack Mounting Kit.
IC-1F and IC-1FILS
After runningwires to the electrical box where
the unit will be located, refer to the label on the
rear cover of the unit and make connections as
indicated. It is not necessaryto observe polarity
when connecting intercom linewires. Connect
the power supply dc return wire to the SHLD
terminal. If another set of wires isto be run from
this unitto another intercom station, connect
these wires at this time.
OPERATION
HeadsetJack: Accepts headsetswith dynamic
microphone and dynamic headphone(s).
Headphone VOLUME Control: Adjusts
headphone listen level. Does not affect mic level.
MICION Switch (IC-1, IC-IF): Inthe MIC
position, the microphone is shut off but the
intercom line is still monitored by the phones. In
the ON position, the microphone is operational
for two-way communication.
OFFIMICICALL Switch (IC-IILS, IC-1FILS): In
the
OFF position, the microphone is shut off but
the intercom line is still monitored by the phones.
Inthe MIC position, the microphone is
operational for two-way communication. Inthe
CALL position, with the switch held continuously,
an inaudiblesignal is sent to all other stations on
the line: on those stations with light signalling,
the Call Indicator lightswill illuminate. When
another station responds verbally, releasethe
switch and it will automatically returnto the MIC
position for two-way communication.
Call Indicator LED (IC-1/LS, IC-1FILS):
Illuminates when station is being called. Does not
illuminate when sending acall signal.
HEADPHONE VOLUME
CONTROL
MICROPHONE ON/OFF
IC-1 FRONT PANEL
HEADPHONE VOLUME
CONTROL
CALL INDICATOR LIGHT
IC-1ILS FRONT PANEL
INTERCOM LINE CONNECTORS
REAR PANEL
J
IC-1 ReferenceGuide

HEADSET CONNECTOR
MIC ON/OFFAND
CALL SWITCH
MICROPHONE
ON/OFF SWITCH
HEADPHONE VOLUME CONTROL
CONTROL
IC-IFFRONT PANEL IC-1FILS FRONT PANEL
-.---
IC-IF Reference Guide

MAINTENANCE
IC-1, IC-IILS Mechanical Exploded
View
2-4

IC-I, IC-IILS Mechanical Parts List
92852, Rev F
92853. Rev W
PART NO.
95220-000
50033-001
58683-000
59739-000
53627-002
51847-111
50994-004
92847-005
51849-011
52264-014
54460-000
52264-007
54460-000
96080-000
51845-046
63410-002
57481-000
57481-003
50995-003
50994-003
51847-122
92874-003
92874-004
92873-001
50049-001
54993-074
57145-001
50014-004
92854-000
ITEM NO.
1
*
2
3**
4*
*
5**
6
7
8
9
10
11**
12**
13
14
15*
**
16
17
18
19*
**
20
21
22
23
24
25
DESCRIPTION
Bezel
Nut, Hex No. 3/8-32
LED
Lens, LED
Clip, Lens Mtg.
Screw No. 4-40
x !4
Connector, XLR-4M (J2)
PCB Assembly, Audio
Screw, No. 4-40
x !4
Connector, 14-Position (J1)
Pin, Snap In (Not Shown)
Connector (J5)
Pin, Snap In (Not Shown)
PCB Assembly, 20 kHz Light Signal
Screw, No. 4-40 x 1
!4
Spacer, Hex, 15/16-inch
Switch, Toggle, SPDT (wlhardware) (S1)
Switch, Toggle, SPDT (w/hardware) (S1)
Connector, XLR-3F (J3)
Connector, XLR-3M (J4)
Screw, No. 6-32 x
%
Housing, Remote
Housing, Remote
Clip, Belt
Washer, Lock, Ext. Tooth, No. 6
Screw, No. 6-32 x
1/4
Potentiometer, IOOK, %W,+20°/o (R22)
Washer, Lock, Int. Tooth, No.
3/8
Chassis
* Unitswithout light signalling only.
** Unitswith light signalling only.

IC-1 F, IC-1FILS Mechanical Exploded View
2-6

,/ -\d
92863, Rev AB
IC-IF, IC-1FILS Mechanical Parts List
PART NO.
50033-001
53434-101
53432-116
53433-115
59739-000
58683-000
51847-111
50994-004
95218-000
51847-124
92857-000
92859-000
50014-002
51845-037
92847-004
57481-000
57481-003
92862-003
92862-004
51845-041
57798-000
53627-002
57145-000
52264-014
54460-000
50014-004
52264-007
54460-000
52188-006
96080-000
95215-000
51845-038
ITEM NO.
1
2
3
4
5*
*
6* *
7
8
9*
10
11
12
13
14**
15
16*
**
17*
**
18
19
20
21
22
23
24
25
26**
27
28
DESCRIPTION
Nut, Hex, No. 3/8-32
Collet
Knob, Control
Cap
Lens, LED
LED
Screw, No. 4-40 x
!4
Connector, XLR-4M (J2)
Bezel
Screw, No. 6-32 x
3/8
Cover Plate, Front
Bracket
Washer, Lock, Int. Tooth, No.
4
Screw, No. 4-40 x 3/16
PCBAssembly, Audio
Switch, Toggle, SPDT (w/hardware) (S1)
Switch, Toggle, SPDT (w/hardware) (SI)
Cover, Rear
Cover, Rear
Screw, 4-40
x '/2
Spacer, 3/16 Ig
Clip, LED Mtg.
Potentiometer, look,
%W, f20°/o (R22)
Connector, 14-Position (JI)
Terminal (Not Shown, For J1)
Washer, Lock, Int. Tooth, No.
3/8
Connector, 7-Position (J5)
Terminal, (Not Shown, For J5)
Nut, Hex, No. 4
PCBAssembly, 20 kHz Light Signal
Angle Bracket
Screw, 4-40
x !A
*Units without light signaling only.
**Unitswith light signaling only.

92846. Rev R
IC-I Audio PCBAssembly Component Layout
96079. Rev H
IC-IILS, IC-IFILS 20 KHz Light Signal PCB Assembly Component Layout
2-8

IC-I Audio PCB Assembly Parts List
All resistors in ohms, 1/4 watt, +5% unlessotherwise noted.
All capacitors are in microfarads unless otherwise noted.
92847, Rev Y
PART NO.
52257-049
52157-251
51821-020
52708-024
52157-004
52157-008
52157-022
52157-012
51821-081
51821-045
51821-524
51821-106
52264-012
50994-001
50995-000
50994-000
51547-000
52154-289
52154-297
52154-237
52154-229
52154-293
52154-271
52154-225
52154-209
52154-233
52154-241
52154-271
52154-233
57145-002
52154-257
57481-000
56741-000
53270-000
53295-000
REFERENCE NO.
C1
C2,21
C5,11
C6,9,12
C7
C8,14
C13
C15
C16,23
C17
C18
C22
J 1
J 2
J 3
J 4
Q 1
R1
R2
R3,4
R5,6,7,8
R9
R10
R11,15
R12,16
R13,18,19
R14,20
R17
R18,19
R22
R23
S 1
TI
U1
U2
DESCRIPTION
Capacitor, 1, 35V, Tantalum
Capacitor, 0.01, 1OOV
Capacitor, 10, 25V Electrolytic
Capacitor, 0.1
Capacitor, 47 pF
Capacitor, 100pF
Capacitor, 0.001
Capacitor, 220 pF
Capacitor, 4.7, 25V Electrolytic
Capacitor, 10, 10V Electrolytic
Capacitor, 10, 50V Electrolytic
Capacitor, 1, 50V Electrolytic
Connector, 12-Pin
Connector, XLR-4M
Connector, XLR-3F
Connector, XLR-3M
Transistor, 2N2925
Resistor, 470 Ohm
Resistor, 220 Ohm
Resistor, 68K
Resistor, 150K
Resistor, 330 Ohm
Resistor, 2.7K
Resistor, 220K
Resistor, 1 M
Resistor, 100K
Resistor, 47K
Resistor, 2.7K
Resistor, 1OOK
Potentiometer, 100K,
%W, 20%
Resistor, 10K
Switch, Toggle SPST
Transformer
IC, Low Noise Preamplifier,AN360
IC, Dual Low Noise OpAmp, NE5532

IC-I/LS, IC-IF/LS 20 KHz LightSignal PCB Assembly Parts List
All resistors inohms, '/4 W, +5% unless otherwise noted.
All capacitors are in microfarads unlessotherwise noted.
REFERENCE NO.
C1,2,3
C4
C5,7,9
C6
C8
C10
C11
CR1
J 5
Q1,3
Q2
R1
R2,5
R3,15
R4
R6
R7
R8
R11
R12
R14
U 1
VR1
DESCRIPTION
Capacitor, Ceramic, 0.001, 50V,
klOO/o
Capacitor, Ceramic, 100pF, 500V, flOO/o
Capacitor, Tantalum, 0.1, 35V, f20°/o
Capacitor NPO, Ceramic, 0.0022, 50V, k2%
Capacitor, Electrolytic, 4.7, 25V, +20°/0
Capacitor, Electrolytic, 10, 25V, +20%
Capacitor, Ceramic, 0.047, 25V, +80 -20%
Diode, 1N4148
Connector, 7-Position
Transistor, 2N2925
Transistor, J175
Resistor, 2.2M
Resistor, 1M
Resistor, 20K
Resistor, 1OK
Resistor, 62K
Resistor, 1OK
Resistor, 47K
Resistor, 24K,
%W, +2%
Resistor, Variable, 5K,
%W, +lOO/o
Resistor, 1.2K,
Socket, &Pin
PART NO.
52676-101
52157-008
52257-065
35694-034
52723-013
52723-014
52158-033
52228-000
57721-007
51547-000
54687-001
52154-201
52154-209
52154-250
52154-257
52154-238
52154-257
52154-241
52155-248
57148-048
52154-456
53258-000
51302-017
53041-002

MICROPHONE PRE-AMPLIFIER 16V/19V LINE AMPLIFIER
I
I I
HEADPHONE AMPLIFIER
-- 'a
NOTES:
1. ALL RESISTORS INOHMS, 1/4 WATT, +5% UNLESS OTHERWISE NOTED.
2. ALL CAPACITORS INMICROFARADS UNLESS OTHERWISE NOTED.
3.
ALL VOLTAGES ARE DCMEASURED USING A HIGH IMPEDANCE METER UNDER NO-SIGNAL
CONDITIONS WlTH CHASSIS AS REFERENCE.
4. WHERE TWO VOLTAGESARE INDICATED, THE FIRST ISWlTH A HEADSET CONNECTED AT J2
AND THESECOND ISWITHOUT.
5. --t- INDICATESRECEIVE SIGNAL PATH. INDICATESTRANSMIT SIGNAL PATH.
6. THIS SCHEMATIC SUBJECT TO CHANGE TO ACCOMMODATE DESIGN IMPROVEMENTS.

NOTES:
1. ALL RESISTORS INOHMS, % WATT, f5%UNLESS OTHERWISE NOTED.
2. ALL CAPACITORS INMICROFARADS UNLESS OTHERWISE NOTED.
3. ALL VOLTAGES ARE DC MEASURED USING A HIGH IMPEDANCE METER
WlTH CHASSIS AS REFERENCE.
4. WHERE TWO VOLTAGES ARE INDICATED, THE UPPER
is WlTH NO
SIGNAL AT P5-4 AND THE LOWER ISWlTH 20 KHz AT 100MV (CALL
SIGNAL IN) AT P5-4.
5. ALL SINGLE VOLTAGES REPRESENT NO-SIGNAL CONDITIONS.
6. 20 KHz ADJUSTMENT: CONNECT FREQUENCY METER BETWEEN ANODE
OF CR1AND CHASSISADJUST R12 FOR A READING OF 20 KHz i100Hz.
7. THIS SCHEMATIC SUBJECT TO CHANGE TO ACCOMMODATE DESIGN
IMPROVEMENTS.