Telex IC-S User manual

GENERAL DESCRIPTION output Impedance:
Phones: 60 ohms (Designed for usewith
The IC-S is asingle-channel speaker station 150-600 ohm phones.)
designed for use with an external microphone.
There are four versions of the IC-S; all identified
Output Power:
by the same model name, but distinguished from Phones: 75 milliwatts into 150ohms.
one another by certain features. For purposes of Speaker: 2watts into 8 ohms.
documentation, the four versions will be Line: 10 milliwatts ($10 dBM).
designated according tofeatures as follows:
1. IC-SF: Wall-mounted station without light
signal (no indicator light onfront panel).
Speaker Acoustic Output:
100dB SPL at 1meter on axis at full power.
2. IC-S: An IC-SF mounted in a carrying case
Total Harmonic Distortion:
with rear panel audio connectors. Micto line: 1%at 10milliwatts.
Line to phones: 1% at 75 milliwatts.
3. IC-SF/LS: Wall-mounted station with light
signal (has indicator light on front panel).
Common Mode Rejection:
4. IC-S/LS: An IC-SF/LS mounted ina Line: 40 dB at 60 Hz.
carrying case with rear panel audio
connectors.
Voltage Gain:
Mic to line: 200 (46 dB).
Lineto phones: 24 (28 dB) adjustable to zero.
/
I
\-/
Speaker Attenuation:
With mic only connected: 0 dB.
With headset connected (mic
+ phones): 6 dB.
SPECIFICATIONS With -10 switch: 10d~ (non-LS units only).
With headset and-10 switch: 16dB (non-LS
Frequency Response: units only).
Transmit: 150-7,000 Hz+1, -3 dB.
Receive: 180-6,000 Hz+1, -3 dB for phones.
Power Requirements:
200-5,000 Hz usablefor speaker. Voltage: 24 Vdc nominal. Will operate on
Equivalent lnput Noise:
Mic Input: 2 microvolts (-116dBV)
150-7.000 HZ.
lnput Level:
Mic: 5 millivolts nominal, 12millivolts
maximum.
Line: 1volt (0dBM) nominal, 4 volts (12 dBM)
maximum.
Input Impedance:
Mic: Greater than 5,000 ohms. (Designedfor
use with 50-600 ohm microphones). .
Line: Greater than 10,000ohms. Transformer
coupled.
/'
12-30 Vdc.
Current: Nosignal - 25 milliarnps.
Average talk
- 60 milliamps.
Signalling (LSunits only) - 60 milliamps.
Dimensions (connectors not included):
IC-S, IC-S/LS: 10.25 inches (260.35 mm) wide
x 7.7 inches (195.6 mm) high x 3.75 inches
(95.25 mm) deep.
IC-SF, IC-SF/LS: 9 inches (228.6 mm) wide x
7 inches (177.8 mm) high
x 2.75 inches
(69.85 mm) deep behind front panel. If unit is
installed using screw-clamp terminals, wire
wrap pin may be cut off; depth reduces to
2.38 inches (60.45 mm).

Connectors:
IC-S, IC-SILS: Miclheadset - one XLR-4M.
Line
- one XLR-3M and one XLR-3F wired in
parallel.
IC-SF, IC-SFILS: Miclheadset
- one XLR-4M.
Line
- three combination screw-clamp, wire-
wrap terminals (screw-clamps will accept No.
22
- No. 14 AWG stranded or solid wire).
External power -three combination screw-
clamp, wire-wrap terminals (use optional).
INSTALLATION
IC-Sand IC-SILS
These stations may be connected to the intercom
line using prefabricatedcables with XLR-3 end
connectors, or cables may be madeto lengths as
required and terminated with XLR-3 cable
connectors.
IC-SFand IC-SFILS
When powering from the intercom line:
1.
Refer to the label on the rear cover
2. Connect the two intercom line wires to the
LlNEterminals.
3. Connect the dc return wire to the SHLD
terminal.
4. Connect ajumper between the 4-24 and
PH
terminals (disregard this step with factory-
fresh units
- jumper should already be in
place).
When poweringfrom
a separate dc supply:
1.
Refer to the label on the rear cover.
2.
Connect the two intercom line wires to the
LlNEterminals.
3. Removethe jumper between the +24 and
PH
terminals.
4. Connect the
"+" lead of the supply to the
+24 terminal.
5. Connect the "-" lead of the supply to the
COMterminal.
When all connections are completed, mount unit
in electrical box using the four screws supplied.
OPERATION
SpeakerlHeadphone VOLUME Control: Adjusts
listen level only. Does not affect mic level.
SPEAKER Switch (IC-S, IC-SF): This is athree-
position switch. Inthe ON position,the speaker
has normal volume output. Inthe
-10 dB position,
speaker output is reduced. Inthe OFF position,
there is nospeaker output. The
- 10 dB and OFF
positions do not affect the headphone or
microphone levels.
SPEAKER ONIOFFand CALL Switch (IC-SILS,
IC-SFILS):
This is a three-position switch.The
ON and OFF positions turn the speaker on and
off but do not affect the headphone output or
microphone level when using a headset. The
CALL position is used for light signalling. Inthe
CALL position, with the switch held continuously,
an inaudible signal is sent to all other stations on
the line. On those stations with light signalling
the Call Indicator lights will illuminate. When
another station responds verbally, release the
switch and it will automatically return tothe ON
position for two-way voice communication.
MicIHeadset Connector: Accepts a push-to-talk
microphone or a headset with dynamic
microphone and headphones.
Call Indicator Light (IC-SILS, IC-SFILS):
Provides a visual indication when the station is
being called.

11 SPEAKER SWITCH
SPEAKER/HEADPHONE
VOLUME CONTROL
1 MICROPHONEIHEADSET
CONNECTOR
SPEAKER ON/OFF
AND CALL SWITCH
I r'
SPEAKER/HEADPHONE
VOLUME CONTROL
I 4CALLINDICATOR LIGHT
[----I MICROPHONE/ HEADSET
CONNECTOR
IC-S, IC-SF FRONT PANEL IC-SILS, IC-SFILS FRONT PANEL
IC-S, IC-SILS REAR PANEL
IC-S Reference Guide

MAINTENANCE
IC-S Mechanical ExplodedView
1-4

IC-S Mechanical Parts List
All parts used on all versions unless otherwise specified *
92909. Rev AC
92910. Rev J
92931, Rev G
92921, Rev H,
92930. Rev C
PART NO.
92913-000
54993-097
52188-008
50014-001
57823-000
92906-000
50014-004
50033-001
92904-000
51845-098
63356-001
50014-103
51845-128
53432-11
6
51847-112
50994-004
57483-000
57481-003
57145-002
52264-014
54460-001
92902-001
57798-000
92908-000
50014-002
51845-041
56471-000
92933-000
50994-000
51847-01
1
50995-000
95219-000
52188-006
95215-000
51845-038
58683-000
53627-002
96080-000
52264-006
54460-001
53434-101
53433-115
59739-000
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
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
DESCRIPTION
Cover, End (IC-S, IC-S/LS)
Screw, 6-32 x
3/4 (IC-S, IC-S/LS)
Nut, Hex, No. 6
Washer, Lock, No. 6
Speaker, 5-Inch, 8-Ohm
Chassis
Washer, Lock
Nut, Hex
Panel, Front
Screw, 6-32 x 1 (IC-S, IC-S/LS)
Microphone Hanger
Washer, Lock
Screw, 8-32 x
!4
Knob
Screw, 4-40 x
3/s
Connector, XLR-4M (J2)
Switch, Toggle, DPDT (IC-S, IC-SF)
Switch, Toggle, SPDT (IC-S/LS, IC-SF/LS)
Potentiometer, 100K,
%W, +20°/0 (R22)
Connector, 14-Position (J1)
Terminal (For item 19)
PCBAssembly, Audio
Spacer
Cover, Rear
Washer, Lock
Screw, 4-40
x %
Foot, Self-Adhesive (IC-S, IC-S/LS)
Housing (IC-S, IC-S/LS)
Connector, XLR-3M (J4
- IC-S, IC-S/LS)
Screw, (J3
- IC-S, IC-S/LS)
Connector, XLR-3F (IC-S, IC-S/LS)
Bezel (IC-S, IC-SF)
Nut, Hex, No. 4 (IC-S/LS, IC-SF/LS)
Angle Bracket
Screw, 4-40 x
!4 (IC-S/LS, IC-SF/LS)
LED (IC-S/LS, IC-SF/LS) (DS1)
Clip, LED Mtg. (IC-S/LS, IC-SF/LS)
PCB Assy, 20 kHz Light Signal (IC-S/LS, IC-SF/LS)
Connector (IC-S/LS, IC-SF/LS)
Terminal (For item 37)
Collet
Cap
. Lens, LED (IC-S/LS, IC-SF/LS)
* IC-S: Portablestation, no light signal.
IC-SF: Flush-mount station, no light signal.
IC-S/LS: Portable station, light signal.
IC-SF/LS: Flush-mount station, light signal.

IC-S Audio PCB Assembly Parts List
All parts used in all versions.
Capacitors are in microfarads unless otherwise specified.
Resistors are in ohms, carbon,
%W, +5% unlessotherwise specified.
92902, Rev Y
PART NO.
52257-049
52157-251
51821-020
52708-024
52157-004
52157-008
51821-010
52676-113
52157-022
52157-012
51821-045
52160-092
51821-106
51821-011
51821-079
50745-002
52263-014
51547-000
52154-289
52154-291
52154-237
52154-229
52154-293
52154-271
52154-209
52154-241
52154-275
52154-233
52154-253
52154-249
52154-321
52154-281
52154-299
52444-001
53270-000
53295-000
53236-000
57703-000
REFERENCENO.
C1
C2,21,26
C5,16
C6,9,27
C7
C8,14
C11
C12
C13,24
C15
C17
C18
C22
C23
C25,28
CR1
P1
Q1
R1
R2
R3,4,5,7,14
R6,8
R9
R10
R11,12,15,16
' R13,20
R17
R18,19
R21,R28
R23
R24
R25,26
R27
T1
U1
U2
U3
DESCRIPTION
Capacitor, 1, 35V, Tantalum
Capacitor, 0.01, 1OOV
Capacitor, 10, 25V, Electrolytic
Capacitor, 0.1
Capacitor, 47 pF, 100V
Capacitor, 100pF, 100V
Capacitor, 47, 35V, Electrolytic
Capacitor,
.l, 50V, Ceramic
Capacitor, 0.001
Capacitor, 220 pF
Capacitor, 10, 1OV, Electrolytic
Capacitor, 220, 35V
Capacitor, 1, 50V
Capacitor, 100, 35V, Electrolytic
Capacitor, 4.7, 25V, Electrolytic
Diode, 1N4003
Pin Assembly
Transistor, 2N2925
Resistor, 470
Resistor, 390
Resistor, 68K
Resistor, 150K
Resistor, 330
Resistor, 2.7K
Resistor, 1 Meg
Resistor, 47K
Resistor, 1.8K
Resistor, 1OOK
Resistor, 15K
Resistor, 22K
Resistor, 22
Resistor, 1K
Resistor, 180
Transformer
IC, Low Noise Preamplifier, AN360
IC, Dual Low Noise Op Amp, NE5532
IC, Amplifier, Audio Power, ULN2280B
Terminal Block

IC-S 20 KHz Light Signal PCB Assembly PartsList
All resistors in ohms, %W, +5% unless otherwise noted.
All capacitors in microfarads unless otherwise noted.
REFERENCE NO.
C1,2,3
C4
C5,7,9
C6
C8
C10
C11
CRI
J5
Q1,3
Q2
R1
R2,5
R3,15
R4
R6
R7
R8
R11
R12
R14
U 1
VRI
DESCRIPTION
Capacitor, Ceramic, 0.001, 50V,
+lOO/o
Capacitor, Ceramic, 100pF, 500V, +1O0/0
Capacitor, Tantalum, 0.1, 35V, +20°/0
Capacitor NPO, Ceramic, 0.0022, 50V, +2%
Capacitor, Electrolytic, 4.7, 25V, +20°/0
Capacitor, Electrolytic, 10, 25V, +20°/o
Capacitor, Ceramic, 0.047, 25V,
f 80 -20%
Diode, 1N4148
Connector, 7-Position
Transistor, 2N2925
Transistor, J175
Resistor, 2.2M
Resistor, 1M
Resistor, 20K
Resistor, 10K
Resistor, 62K
Resistor, 10K
Resistor, 47K
Resistor, 24K,
%W, k2%
Resistor, Variable, 5K,
%W, +1O0/0
Resistor, 1.2K,
%WI +5%
IC, Tone Decoder, XR567
Diode, Zener, 6.2V,
%W, +5%
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

JUMPER~PH" TO "tz4" FOR LINE POWEREDOPERATION.
FEMOVE JUMPER AND CONNECT P4VDC TO
"+24' AND
COM. FOR SEPARATELY POWERED OPERATION.
--------
NOTES:
1.
ALL RESISTORS INOHMS, 1/4 WATT, 25% UNLESS
R:,5
OTHERWISE NOTED. 23451 6
2. ALL CAPACITORS INMICROFARADS UNLESS
TO LIGHT SIGNAL PCB ASSEMBLY
I
OTHERWISE NOTED.
SPEAKER AMPLIRER
1 ( IC-S/LS. IC-SWLS ONLY)
--- - - ----I
3. -)-- INDICATES RECEIVE SIGNAL PATH.
-
U2
INDICATESTRANSMIT SIGNAL PATH.
4. ALL VOLTAGES ARE DC MEASURED USINGA HIGH
IMPEDANCE METER UNDER NO-SIGNAL
.
CONDITIONSWlTH CHASSIS AS REFERENCE.
5. WHERE TWO VOLTAGES ARE INDICATED, THE FIRST I I
ISWlTH A HEADSET CONNECTEDAT J2AND THE
SECOND ISWITHOUT.
6. THIS SCHEMATIC SUBJECT TO CHANGE TO
ACCOMMODATE DESIGN IMPROVEMENTS.

96078, Rev J
IC-S 20 KHz Light Signal Schematic Diagram
1-10