User manual TELEX AUDIOCOM IC-3M REV A

[. . . ] Dimensions (without external connectors): IC-3M, 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-3MF/LS: 4. 5 inches (114. 3 mm) high x 4. 62 inches (117. 35 mm) wide x 2. 5 inches (63. 5 mm) deep behind front panel. If unit is installed using screw-clamp terminals, wirewrap pins may be cut off and depth reduces t o 2. 15 inches (54. 61 mm). Weight: IC-3M, IC-3M/LS: 1. 5 Ibs (0. 51 kg) Connectors: IC-3M/LS: One XLR-4M for headset connection. [. . . ] 14 AWG stranded or solid wire. SPECIFICATIONS Specifications apply to all versions unless otherwise noted. Frequency Response: Transmit: 150-7, 000 Hz t 1 , -3 dB. Equivalent lnput Noise: Mic Input: 2 microvolts (-116 dBV) 150-7, 000 HZ. Input Level: Mic: 5 millivolts nominal, 12 millivolts maximum. Line: 1 volt (0 dBM) nominal, 4 volts (12 dBM) 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. INSTALLATION IC-3M and IC-3M1LS HEADPHONE VOLUME CONTROL Permanent installation may be accomplished by removing the belt clip and utilizing the threaded belt clip mounting holes along with the additional threaded hole in the case to secure the unit to other equipment. These units may also be rack mounted using an RM-13 Rack Mounting Kit. MICROPHONE ON/OFF IC-3M F and IC-3M FILS After running wires 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 necessary to observe polarity when connecting intercom line wires. Connect the power supply dc return wire to the SHLD terminal. If another set of wires is to be run from this unit to another intercom station, connect these wires at this time. IC-3M FRONT PANEL HEADPHONE VOLUME CONTROL OPERATION Headset Jack: Accepts headsets with dynamic microphone and dynamic headphone(s). 6-32 x 3/8 Cover Plate, Front Bracket Washer, Lock, Int. 4-40 x 3/16 PCB Assembly, 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 ( J I ) Terminal (Not Shown, For J1) Washer, Lock, Int. 3/8 Connector, 7-Position (J5) Terminal, (Not Shown, For J5) Nut, Hex, No. 4 PCB Assembly, 20 kHz Light Signal Angle Bracket Screw, 4-40 x !A *Units without light signaling only. **Units with light signaling only. PART NO. 50033-001 53434-101 53432-1 16 53433-1 15 59739-000 58683-000 51847-1 11 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 92863, Rev AB 92846. Rev R I C - I Audio PCB Assembly Component Layout IC-IILS, IC-IFILS 20 KHz Light Signal PCB Assembly Component Layout 96079. Rev H 2-8 I C - I Audio PCB Assembly Parts List All resistors in ohms, 1/4 watt, +5% unless otherwise noted. All capacitors are in microfarads unless otherwise noted. REFERENCE NO. C1 C2, 21 C5, 11 C6, 9, 12 C7 C8, 14 C13 C15 C16, 23 C17 C18 C22 J1 J2 J3 J4 Q1 R1 R2 R3, 4 R5, 6, 7, 8 R9 R10 R11, 15 R12, 16 R13, 18, 19 R14, 20 R17 R18, 19 R22 R23 S1 TI U1 U2 DESCRIPTION Capacitor, 1, 35V, Tantalum Capacitor, 0. 01, 1O V O Capacitor, 10, 25V Electrolytic Capacitor, 0. 1 Capacitor, 47 pF Capacitor, 100 pF 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, 1O K O Potentiometer, 100K, %W, 20% Resistor, 10K Switch, Toggle SPST Transformer IC, Low Noise Preamplifier, AN360 IC, Dual Low Noise Op Amp, NE5532 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 Socket, &Pin MICROPHONE PRE-AMPLIFIER 16V/19V I LINE AMPLIFIER I I -HEADPHONE AMPLIFIER ' NOTES: 1. ALL RESISTORS IN OHMS, 1/4 WATT, +5% UNLESS OTHERWISE NOTED. ALL CAPACITORS IN MICROFARADS UNLESS OTHERWISE NOTED. ALL VOLTAGES ARE D C MEASURED USING A HIGH IMPEDANCE METER UNDER NO-SIGNAL CONDITIONS WlTH CHASSIS AS REFERENCE. [. . . ]