TEXAS RANGER TR-296GK Service Manual
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TEXAS RANGER TR-296GK Service Manual

Cb radios mobile transceiver
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Summary of Contents for TEXAS RANGER TR-296GK

  • Page 2: Table Of Contents

    TABLE OF TR-296GK/DX CONTENTS PAGE CHAPTER 1 SPECIFICATIONS General ..........

  • Page 3: Specifications

    CHAPTER 1 TR-296GK/DX SPECIFICATIONS 1.0 GENERAL Model TR-296GK / TR-296DX (B),(C) Frequency Range 26.965 - 27.405MHz. Emission Modes AM/USB/LSB Frequency Control Phase Lock Loop (PLL) synthesizer. ± 0.005 %. Frequency Tolerance ± 0.001 %. Frequency Stability Operating Temperature Range -30°C to +50°C.

  • Page 4: Introduction

    TR-296GK/DX OPERATION Figure 2-1 Front Panel 2.0 INTRODUCTION This section explains the basic operating procedures for the TEXAS RANGER TR-296GK / TR- 296DX mobile transceiver. 2.1 CONTROLS AND CONNECTIONS 2.1.1 FRONT PANEL Refer to the above Figure 2-1 for the location of the following controls.
  • Page 5 4. SWR CAL CONTROL This SWR CAL control allows the user to calibrate the SWR meter. 5. MIC GAIN CONTROL Adjusts the microphone gain in the transmit and PA modes. This controls the gain to the extent that full talk power is available several inches away from the microphone. In the Public Address (PA) mode, the control functions as the volume control.

  • Page 6: Rear Panel

    16. CHANNEL DISPLAY The channel display indicates the current selected channel. 2.1.2 REAR PANEL Figure 2-2 represent the location of the following connections: Figure 2-2 Rear Panel 1. ANTENNA This jack accepts 50 ohms coaxial cable with a PL-259 type connector. 2.
  • Page 7 26.965 27.215 26.975 27.225 26.985 27.255 27.005 27.235 27.015 27.245 27.025 27.265 27.035 27.275 27.055 27.285 27.065 27.295 27.075 27.305 27.085 27.315 27.105 27.325 27.115 27.335 27.125 27.345 27.135 27.355 27.155 27.365 27.165 27.375 27.175 27.385 27.185 27.395 27.205 27.405 2.2 MICROPHONE The receiver and transmitter are controlled by the push-to-talk switch on the microphone.

  • Page 8: Microphone

    microphone two inches from the mouth and speak clearly in a normal voice. The radio comes complete with a low impedance (500 ohm) dynamic microphone. For installation instructions of the microphone, see section 2.4 “ALTERNATE MICROPHONES AND INSTALLATION”. 2.3 OPERATION 2.3.1 PROCEDURE TO RECEIVE 1.
  • Page 9 5 WIRE MIC CABLE Pin Number Mic Cable Lead Audio Shield Audio Lead Receive Control Grounding Transmit Control Figure 2-3 Transceiver Microphone Schematic Figure 2-4 Microphone Plug Wiring Figure 2-5 Microphone plug pin numbers viewed from rear of pin receptacle. - 8 -...

  • Page 10: Circuit Description

    CIRCUIT TR-296GK/DX DESCRIPTION 3.0 INTRODUCTION This section explains the technical theory of operation for the TR-296GK / TR-296DX mobile transceiver. 3.1 PLL CIRCUIT The Phase Lock Loop (PLL) circuit is responsible for developing the receiver’s first local oscillator signal and the transmitter’s exciter signal. The PLL circuit consists primarily of IC1, IC2, TR20, TR29 and TR30.
  • Page 11 - 10 -...

  • Page 12: Alignment

    CHAPTER 4 TR-296GK/DX ALIGNMENT 4.0 REQUIRED TEST EQUIPMENT & DC Power Supply (13.8VDC, 10A) Frequency Counter (100 MHz) " RF Wattmeter (25~60 MHz, 25W) RF Signal Generator (100 MHz) Multimeter Automatic Distortion Meter Automatic Modulation Meter Oscilloscope (50 MHz) Audio Signal Generator Sinad Meter 4.1 ALIGNMENT PROCEDURES...

  • Page 13: Receiver Alignment

    ITEM U.U.T. SETTING ADJUST MEASUREMENT POINT BIAS Current Set radio to CH 19, USB TX mode. MOD off. Connect current meter to TP8 (+) and green 30 mA lead wire (-). Connect current meter to TP7 (+) and violet 50 mA lead wire (-).
  • Page 14 POINT AM Sensitivity Set radio to CH 20, AM RX MODE. L13, L15, Audio output > 2V Clarify setting in 12 o’clock. L3, L4, L5, S/N > 10 dB Set RF gain fully clockwise. L6, L7, L8, Set SQ fully counter clockwise. L9, L10 Set VOL control to 2 o’clock.
  • Page 15 Figure 4-2 Receiver test setup - 14 -...

  • Page 16: Chapter 5

    Figure 4-3 Main PCB Adjustment Location CHAPTER 5 - 15 -...

  • Page 17: Maintenance

    TR-296GK/DX MAINTENANCE 5.0 PRECAUTIONS The inherent quality of the solid-state components used in this transceiver will provide many years of continuous use. Taking the following precautions will prevent damage to the transceiver. (i) Never key the transmitter unless an antenna or suitable dummy load is connected to the antenna receptacle.
  • Page 18 TR-296GK/DX PARTS LIST 6.0 GENERAL Information on most electrical and mechanical parts is included in the parts list. The reference designators are in alphanumeric order. 6.1 ORDERING REPLACEMENT PARTS Parts orders should be referred to the parts department at: • Ranger Communications, Inc.
  • Page 19 TR-296GK/DX ROTARY SW. P.C.B ITEM REFERENCE RANGER PART DESCRIPTION NUMBER NUMBER EPT014831Z ROTARY SW. P.C.B ROTARY SW PCB EWRT32059S ROTARY SW R401-R414 RCU146814Z 680 ohm 1/4W J402 WX01070705 JUMPER WIRE J401 WX01070715 JUMPER WIRE J403 WX01070712 JUMPER WIRE REMARK: SOLDER SIDE (BLUE) PART LIST: TR-296GK/DX MIC P.C.B...
  • Page 20 REMARK: LEFT: COMPONENT SIDE RIGHT: SOLDER SIDE PART LIST: TR-296GK/DX CH DISPLAY P.C.B ITEM REFERENCE RANGER PART DESCRIPTION NUMBER NUMBER EPT014821Z CH DISPLAY P.C.B CH DISPLAY PCB EX03N40003 LED DISPLAY REMARK: SOLDER SIDE (BLUE) - 19 -...
  • Page 21 - 20 -...
  • Page 22 TR-296GK/DX MAIN PCB. REMARK: COMPONENT SIDE - 21 -...
  • Page 23 TR-296GK/DX MAIN PCB. REMARK: COPPER SIDE PART LIST TR-296GK/DX MAIN PCB - 22 -...
  • Page 24 1.8K Ω 1/4W RCM141824B 3.3K Ω 1/4W R34,224 RCM143324B REFERENCE RANGER DESCRIPTION 3.9K Ω 1/4W RCM143924B NUMBER PART NO. 10K Ω 1/4W R113 RCM141034B EPT014813Z MAIN P.C.B 1 Ω 1/4W 100K Ω 1/4W R208 RCU141094Z R225 RCM141044B 3.3 Ω 1/4W 56 Ω...
  • Page 25 C132 CE0502257H 2.2uF 50V ECIFT12005 I.F.T C23,25,108,135,230, CE050474Z 0.47uF 50WV ECIFT12006 I.F.T ECIFT12372 I.F.T C33,134,144,174,191, CE0501057Z 1uF 50WV ECIFT12373 I.F.T ECIFT12374 I.F.T C99,232 CE0502257Z 2.2uF 50WV ECIFT12375 I.F.T C24,92,180 CE0504757Z 4.7uF 50WV ECIFT12376 I.F.T C181,133,173 CE0251067Z 10uF 25WV ECIFT12377 I.F.T C73,109 CE0252267Z 22uF 25WV...
  • Page 26 WL0125009Z LEAD WIRE WL0725009Z LEAD WIRE MAIN WP0818005Z SHIELD WIRE MAIN WP0923005Z SHIELD WIRE TP7,8 GZZZ50145Z D35,69(COPPER SIDE) EDHU00200Y DIODE(SMD) 68 Ω 1/4W R502(COPPER SIDE) RCP146804Z MAIN(COPPER SIDE) WP0812005Z SHIELD WIRE FREQ. COUNTER EX07N48793 WIRE CONN/H DCx1 CC0501027L 0.001uF 50WV DCx1 CC0501037L 0.01uF 50WV...
  • Page 29 AT0296040A  COPYRIGHT 1999, RANGER COMMUNICATIONS INC.

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Tr-296dx

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