Telex TR-200 Service Manual
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Telex TR-200 Service Manual

Telex TR-200 Service Manual

Professional wireless intercom system
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TELEX
Service Manual
PROFESSIONAL
WIRELESS
INTERCOM SYSTEM
TR-200 SERIES
TELEX,

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Summary of Contents for Telex TR-200

  • Page 1 TELEX Service Manual PROFESSIONAL WIRELESS INTERCOM SYSTEM TR-200 SERIES TELEX,...

  • Page 2: Table Of Contents

    Internal Controls CHAPTER 2 IDENTIFICATION OF CIRCUIT BOARD VERSION GENERAL TRANSMIT AND R E C E I ~ CIRCUIT BOARDS CHAPTER 3 TR-200 INSTRUMENT DISASSEMBLY TRANSMIT BOARD CIRCUIT DESCRIPTION ALIGNMNENT PROCEDURE VOLTAGE TABLES - TRANSMIT BOARD RECEIVE BOARD CIRCUIT DESCRIPTION...
  • Page 3 Transmit P.C. Board Assembly Component Layout (Foil Side View) Receive P . C . Board Assembly Component Layout (Foil Side View) Schemat~c Diagram TR-200 Version 4 Schematic Diagram TR-2M) Version 3 Schematic Diagram TR-200 Version 2 Schematic Diagram TR-200 Version 1...

  • Page 4: Chapter 1- General Ineormation

    The Telex Models TR-200 and TR-200P Belt-pack Transceivers are designed with one transmit and one receive channel. The TR-200 is a portable unit which communicates in full duplex with either the BTR-200 base station or a mirror image TR-200. Push-to-Talk with Lock-to-TaLk feature switch for the TR-200 and Push-to-Transmit with Lock-to- Transmit feature for the TR-200P.

  • Page 5: Specifications Tr-200

    SPECIFICATIONS Overall Transmit . . . Receive ~~~- TR-200 6 AA cells (Alkaline, NEDA, MN 1500) Nickel Cadmium Optional typ c to 1 3 0 ' ~ (-20'~ to 55'~) 4.25" W x 4.125" H x 2.0" D (108mm x 105mm x 51mm)

  • Page 6: Controls And Connections

    & & l . . BELTCLI CONTROLS AND CONNECTIONS Push-To-Talknock-To-Talk Switch: For Model TR-200, this switch enables the talk function. For Model TR-200J?, this switch enables the transmit and audio function and otherwise operates as a volume described for TR-200.

  • Page 7: Internal Controls

    "D" when using a Dynamic Microphone or" E" when using an Electret Microphone. NOTE: All Telex headsets that are used with this intercom are dynamic microphones. Unit is shipped* the*" Battery Compartment: Holds 6 AA batteries in a removable battery holder.

  • Page 8: Identification Of Circuit Board Version

    IDENTIFICATION OF CIRCUIT BOARD VERSION GENERAL Version 1 units may be identified by the absence of chokes in the cable connecting the two 1.2 board assembly to the headset connector. Versions 2, 3, and have two such chokes immediately P.C. following the board connector.

  • Page 9: Transmit And R E C E I ~ Circuit Boards

    #4 and 1 each #2 socket head 2. Remove screws from the back of the unit 3. Turn the TR-200 overand remove the front case half. NOTE: When refitting the case front the volume control knob must be positioned slots mate properly.

  • Page 10: Exploded View Of Tr-200

    2 PLACES (TYPICAL 2 PLACES Li : - 1 4 PIN IAGRAM TRANSMIT WIRING DIAGRAM RECEIVE Figure 3-1 Exploded View of TR-200...

  • Page 11: Transmit Board

    CIRCUIT DESCRIPTION From the headset connector the microphone signal is first amplified by Q3 and Q4. This pair has a gain of 12 dB. Depending upon which type of microphone is used, S1 is set by the userto dynamic or electret. The electret position provides an l l d B drop in gain to compensate for the extra output.

  • Page 12: Voltage Tables - Transmit Board

    7. Adjust L11 for the correct frequency. This is on Y 1 printed and stamped into the rear case. 8. Repeat steps 6 and 7 as necessary. Adjust I228 for a deviation o f f 3. KHz. VOLTAGE TABLES TRANSMIT BOARD...

  • Page 13: Receive Board

    ~t may be desirable in some instances to gate not only the audio on and off with the push-to-talk button but also the transmitter itself. This would be the case if several TR-200 units which were transmitting on the same frequency were being used togeth~;--F~r-ths~pti~n,--R44,...

  • Page 14: Voltage Tables - Receive Board

    VOLTAGE TABLES RECEIVE BOARD 4101 NOTE: If this part is absent, then surface mount part has been installed on foil side. Pad designations are the same.
  • Page 15 VOLTAGE TABLES RECEIVE BOARD CONTINUED 3-7/34 Blank...

  • Page 16: Figure

    Figure 3-3 figure 3-2 P.C. Board Assembly Transmit (879976-) P.C. Board Assembly Receiver (879977-) Component Layout (Component dde) Component Layout (Component Side)

  • Page 17: Transmit P.c. Board Assembly Component Layout (Foil Side View)

    Figure 3-4 Transmit P.C. Board Assembly Component Layout (Foil Side View) Component Layout (Foil Side View)

  • Page 18: Schematic Diagram Tr-2M) Version 3

    Figure 3-6 Schematic Diagram TR-200 Version...

  • Page 19: Schematic Diagram Tr-200 Version

    1 _ _ - _ - _ - - _ _ - _ - - _ - _ 1 RECEIVE BOARD FOR BELTPACKTO B&TP*CK U D D N ~-~~~~ ~~~~ Figure 3-7 Schematic Diagram TR-200 Version 3 TRANSMIT BOARD...
  • Page 20 ,----- TRANSMIT BOARD Figure 3-8 Schematic Diagram TR-200 Version 2...
  • Page 21 BRWACKTO R I B '" BELTPACK MODELS y r e Schematic Diagram TR-200 Version 1 TRANSMIT BOARD...

  • Page 22: Receive P . C

    Receive PCB Assembly AU Capacitors in picofarads unless otherwise noted Description Capacitors Capacitor, 82 capacitor, 62 Capacitor, 56 Capacitor, .75 Capacitor, .33 Capacitor, 56 Capacitor, 39 Capacitor, 33 Capacitor, 33 Capacitor, 27 Capacitor, 15 Capacitor, 100 Capacitor, ,001 Capacitor, 100 Capacitor, 27 Capacitor, 22 Capacitor, 15...
  • Page 23 Ref No. Description Resistors Resistor, 1.5K Resistor, 4.7K Resistor, 10K Resistor, 150 Resistor, 47 (Not Used) Resistor, 18K Resistor, 10K Resistor, 330 Resistor, 47 Resistor, 3K Resistor, 270 Resistor, IOOK Resistor, 100 Resistor, 330 Resistor, 20 Resistor, l00K Resistor, 22K Resistor, 22K Resistor, 750K Resistor, 68K...

  • Page 24: Electrical Parts Transmit Pcb Assembly (879976-*)

    AU capacitors picofarads unless otherwise noted. Ref. No. Description Capacitors Capacitor, Capacitor, 4.7@ Capacitor, 100 (Not Used) Capacitor, 100 1 w F Capacitor, Ca~acitor, I00 capacitor, 4.7pF Capacitor, lpP Capacitor, lpF Ca~acitor. .l UF ~ 1 2 c$acitor; 1 ; ~ (Not Used) capacitor,'.0l p~ Capacitor, 1 0 ~ F...

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Tr-200 series

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