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Ranger TR-127GK/DX manual

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Table of contents for the manual

  • Page 1

    REV. A Dec. 2004 TR-127GK/DX 40 CHANNEL AM CB MOBILE RADIO Service Manual Communications, Inc.[...]

  • Page 2

    - 1 - TR-127GK/DX TABLE OF CONTENTS PAGE CHAPTER 1 SPECIFICATIONS 1.0 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1 Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.[...]

  • Page 3

    - 2 - 1.0 GENERAL Model TR-127GK, TR-127DX Channels 40 Frequency Range 26.965 – 27.405 MHz Emission Modes AM Frequency Control Phase Lock Loop (PLL) synthesizer Frequency Stability 0.001 % Operating Temperature Range -30 ° C to +50 ° C Antenna Impedance 50 Ohms Input Voltage 13.8V DC Antenna Connector Standard SO-239 type Dimensions 7 1/4”(W)[...]

  • Page 4

    - 3 - TR-127GK/DX CHAPTER 2 OPERATION Figure 2-1 Front Panel 2.0 INTRODUCTION This section explains the basic operating procedures for the T R-127 GK or TR-127DX mobile CB radio. 2.1 CONTROLS AND CONNECTIONS 2.1.1 FRONT PANEL Refer to the above Figure 2-1 for the location of the following controls. 1. MICROPHONE JACK: Used to connect microphone for[...]

  • Page 5

    - 4 - background noise is just eliminated. Further clockwise rotati on will increase the threshold level which a signal must overcom e in order to be hear d. Only strong signals will be heard at a maxim um clockwise setting. 5. RF GAIN CONTROL: This control is us ed to reduce the ga in of the RF (rece ive) amplifier und er strong signal conditions.[...]

  • Page 6

    - 5 - REAR PANEL Figure 2-2 represents the location of the following connections: This devi ce complies wit h part 15 o f the FCC Rules. Operation is subject to the condition that t his device MADE IN CHI NA FCC ID : MEE−VX−129CN MODEL NO. : TR−1 27 AM 40 CH SERIAL NO. : CB TRANSCEIVER does not caus e harmful interference. +POWER− ANT. EXT.[...]

  • Page 7

    - 6 - 2.1.3 FREQUENCY CHART CHANNEL CHANNEL FREQUENCY (MHz) CHANNEL CHANNEL FREQUENCY (MHz) 1 26.965 21 27.215 2 26.975 22 27.225 3 26.985 23 27.255 4 27.005 24 27.235 5 27.015 25 27.245 6 27.025 26 27.265 7 27.035 27 27.275 8 27.055 28 27.285 9 27.065 29 27.295 10 27.075 30 27.305 11 27.085 31 27.315 12 27.105 32 27.325 13 27.115 33 27.335 14 27.1[...]

  • Page 8

    - 7 - 2.2 MICROPHONE The push-to-talk switch on the microphone controls th e receiver and transmitter. Press the switch and the transmitter is activated, re lease switch to receive. W hen transmitting, hold the microphone two inches from your mouth and speak clearly in a norma l voice. This transceiver com es complete with a low impedance dynamic m[...]

  • Page 9

    - 8 - 2.4 ALTERNATE MICROPHONES AND INSTALLATION For best results, the user should select a low im pedance dynamic type microphone or a transistorized microphone. Transistorized type microphones have a low output im pedance characteristic. The microphones must be provided with a four-lead cab le. The audio conductor and its shielded lead comprise t[...]

  • Page 10

    - 9 - TR-127GK/DX CHAPTER 3 CIRCUIT DESCRIPTION 3.0 INTRODUCTION This section explains the technical theory of operation for the TR-127GK or TR-127DX mobile CB radio. 3.1 PLL CIRCUIT The Phase Lock Loop (PLL) circuit is responsible for developing the receiver’s first local o scillator signal and the transmitter’s exciter sig nal. The PLL ci rcu[...]

  • Page 11

    - 10 - Q23 Q27 Q28 15.48M Q6 - Q 8 1ST MIXER ANT RX Q12 RF AMP RF GAIN Q11 NB Q1 - Q5 Q13 AM/FM MIX Q14 C.F. 455KHz FL1 Q9,Q10,Q15 D2,3 AM IF AM DET SQ AF POWER IC1 IC3 L23 TX MIXER MIXER L.P.F TX POWER LOW PA SS PLL TX L21 GPS-668 ROTARY SW PLL CODE L12,13,14 FILTER OSC Q16 Q17 IC2 Q18 DRIVER DRIVER X2 10.695MHz Q24 TX,RX SW VCO PLL IC IC4 X1 10.2[...]

  • Page 12

    - 11 - TR-127GK/DX CHAPTER 4 ALIGNMENT 4.0 REQUIRED TEST EQUIPMENT c DC Power Supply (13.8VDC, 10A) d RF Wattmeter (10W ) e Multi-meter f Automatic Modulation Meter g Audio Signal Generator h Frequency Counter (100 MHz) i RF Signal Generator (100 MHz) j Automatic Distortion Meter k Oscilloscope (50 MHz) l Sinad Meter 4.1 ALIGNMENT PROCEDURES This t[...]

  • Page 13

    - 12 - 4.1.2 TRANSMITTER ALIGNMENT ITEM U.U.T. SETTING ADJUST POINT MEASUREMENT TX Power Set radio to CH 19 AM TX mode. Connect RF Power Meter to antenna jack. L26, L27, L18 MAX > 4W Balance Power Between CH. 1 - 40 AM TX Power Set radio to CH 19 AM TX mode. L14 3.8 W RF Power Meter Set radio to CH 19 AM TX mode. Set S/RF /SWR/CAL Switch to S/RF[...]

  • Page 14

    - 13 - Figure 4-1 Transmitter test setup Figure 4-2 Receiver test setup[...]

  • Page 15

    - 14 - TR-127GK/DX MAIN PCB ADJUSTMENT LOCATION[...]

  • Page 16

    - 15 - TR-127GK/DX CHAPTER 5 MAINTENANCE 5.0 PRECAUTIONS The inherent quality of the solid-state components us ed in this transceiver will provide m any years of continuous use. Taking the following precautions will prevent damage to the transceiver. (i) Never key the transm itter unless an antenna or suitab le dummy load is connected to the antenn[...]

  • Page 17

    - 16 - TR-127GK/DX CHAPTER 6 DIAGRAMS & PARTS LIST 6.0 GENERAL Information on most electrical an d mechanical parts is included in the parts list. The ref erence designators are in alphanumeric order.[...]

  • Page 18

    - 17 - TR-127GK/DX ROTARY SWITCH PCB (EPT092920Z) (SMD-COPPER SIDE) ( COMPONENT SIDE )[...]

  • Page 19

    - 18 - PART LIST: TR-127GK/DX ROTARY SW. P.C.B ITEM REFERENCE NUMBER RANGER PART NUMBER DESCRIPTION 1 EPT012921Z ROTARY SW PCB 2 R305 RCY010004Z CHIP/F/R 0.0 Ω 0.1W 3 R306 RCY013314Z CHIP/F/R 330 Ω 0.1W 4 R307,R308,R309,R310, R311,R312,R313,R314, R315,R316,R317,R318, RCY016814Z CHIP/F/R 680 Ω 0.1W 5 D301,D307,D316,D317, D318,D319,D320,D321, D[...]

  • Page 20

    - 19 - TR-127GK/DX DISPLAY PCB (EPT092930Z) ( COMPONENT SIDE ) ( COMPONENT SIDE ) ( COPPER SIDE )[...]

  • Page 21

    - 20 - PART LIST: TR-127GK/DX DISPLAY P.C.B ITEM REFERENCE NUMBER RANGER PART NUMBER DESCRIPTION 1 EPT012930Z DISPLAY PCB 2 D201 EX01Y40004 LED 3mm RED/GREEN 3 LED DISPLAY EX03N40016 LED DISPLAY GREEN 4 D202 EX01N40140 LED 3mm RED[...]

  • Page 22

    - 21 - TR-127GK/DX MAIN PCB (EPT012910A) ( COMPONENTS SIDE )[...]

  • Page 23

    - 22 - TR-127GK/DX MAIN PCB (EPT012910A) ( COPPER SIDE )[...]

  • Page 24

    - 23 - PART LIST TR−127GK/DX MAIN PCB REFERENCE NUMBER RANGER PART NO. DESCRIPTION EPT012910Z MAIN PCB R131,132 RCM160004Z 0 Ω 1/16W R56,62 RCM161094Z 1 Ω 1/16W R107 RCM162294Z 2.2 Ω 1/16W R64 RCM168294Z 8.2 Ω 1/16W R65 RCM162204Z 22 Ω 1/16W R72,103 RCM163304Z 33 Ω 1/16W R68 RCM163904Z 39 Ω 1/16W R53 RCM164704Z 47 Ω 1/16W R19,104 [...]

  • Page 25

    - 1 - TR3,5,9,10,11, 15,19,21 T2SC00945P 2SC945P TR4,20,22,24 T2SA00733P 2SA733P TR12 T2SC01674L 2SC1674L TR13 F2SK00192L 2SK192ABL TR14 F2SK00192R 2SK192A-GR TR16 T2SC02078D 2SC2078D TR17,28 T2SC02314F 2SC2314F TR18 T2SC01906Z 2SC1906 TR25 T2SD00880Y 2SD880Y TR29 TDTC0114YS DTC114YSA D1,2,3,4,10,11,13, 14 ED1N00060P 1N60P D5,6,7,8,12,15, 16,17,19,[...]

  • Page 26

    TR-127GK/DX SCHEMATIC DIAGRAM[...]

  • Page 27

    45 5 8 4 9 6 3 2 51 7 1 67 68 10 65 66 50 52 52 49 12 11 43 44 42 70 63 14 55 13 29 27 46 47 54 41 40 64 53 58 20 28 26 VR 50KB/50KA/SW (VOL/SQ) 1 RV50303602 46 19 34 25 56 29 32 INSULATING PLATE 13*18*0.15 MM ANT SOCKET 62 EX06T41019 EWRT32059Z BT240N030F 72 71 70 JF413206ZX 66 68 69 67 64 65 63 JS053006MN XZZZ90296A JS053006MN JS033006MN JS052604[...]

  • Page 28

    45 5 8 4 9 6 3 2 51 7 1 67 68 10 65 66 50 52 52 49 12 11 43 44 42 70 63 14 55 13 29 27 46 47 54 41 40 64 53 58 20 28 26 VR 50KB/50KA/SW (VOL/SQ) 1 RV50303602 46 19 34 25 56 29 32 INSULATING PLATE 13*18*0.15 MM ANT SOCKET 62 EX06T41019 EWRT32059Z BT240N030F 72 71 70 JF413206ZX 66 68 69 67 64 65 63 JS053006MN XZZZ90296A JS053006MN JS033006MN JS052604[...]

  • Page 29

    AT0127040A  COPYRIGHT 2004, Ranger Communications, Inc. Communications, I nc.[...]