TEXAS RANGER TR-296DX Service Manual Download Page 1 | Manualshive

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Summary of Contents for TR-296DX

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Page 2: ... Alternate Microphones And Installation 7 CHAPTER 3 CIRCUIT DESCRIPTION 3 0 Introduction 9 3 1 PLL Circuit 9 3 2 Receiver Circuit 9 3 3 Transmitter Modulation Circuit 9 3 4 Transmitter Amplifier Circuit 9 CHAPTER 4 ALIGNMENT 4 0 Required Test Equipment 11 4 1 Alignment Procedures 11 4 1 1 PLL Alignment 11 4 1 2 Transmitter Alignment 12 4 1 3 Receiver Alignment 13 CHAPTER 5 MAINTENANCE 5 0 Precauti...

Page 3: ...B Spurious Emissions 55 dB Carrier Suppression 55 dB Audio Frequency Response 300 to 2500 Hz Antenna Impedance 50 Ohms Output Indicators Meter shows relative RF output power signal strength and SWR Transmit LED glows red when transmitter is in operation 1 2 RECEIVER Sensitivity For 10dB S N AM 0 5 µV Sensitivity For 10dB S N SSB 0 25 µV IF Frequency AM 10 695 MHz 1st IF 455 KHz 2nd IF Image Reject...

Page 4: ...ceiver background noise in the absence of an incoming signal For maximum receiver sensitivity it is desired that the control be adjusted only to the point where the receiver background noise is eliminated Turn fully counter clockwise then slowly clockwise until the receiver noise disappears Any signal to be received must now be slightly stronger than the average received noise Further clockwise ro...

Page 5: ...ct a desired transmit and receive channel 10 FRONT PANEL METER The Front Panel Meter allows the user to monitor signal strength RF output power and SWR level 11 NB ANL OFF SWITCH In the ANL position the automatic noise limiter in the audio circuits is activated When the switch is placed in the NB ANL position the RF noise blanker is also activated The noise blanker is very effective in eliminating...

Page 6: ...io has a black and red wire The black goes to negative and the red goes to positive 3 FREQUENCY COUNTER CONNECTOR This F C connector is used for an external frequency counter which indicates the frequency of the selected channel 4 PA SP This jack is for PA operation Before operating you must first connect a PA speaker 8 ohms 4W to this jack 5 EXT SP This jack accepts 4 to 8 ohms 5 watts external s...

Page 7: ... 085 MHz 31 27 315 MHz 12 27 105 MHz 32 27 325 MHz 13 27 115 MHz 33 27 335 MHz 14 27 125 MHz 34 27 345 MHz 15 27 135 MHz 35 27 355 MHz 16 27 155 MHz 36 27 365 MHz 17 27 165 MHz 37 27 375 MHz 18 27 175 MHz 38 27 385 MHz 19 27 185 MHz 39 27 395 MHz 20 27 205 MHz 40 27 405 MHz 2 2 MICROPHONE The receiver and transmitter are controlled by the push to talk switch on the microphone Press the switch and ...

Page 8: ...o far or some of weaker signals will not be heard 6 Set the CHANNEL selector switch to the desired channel 7 Set the RF GAIN control fully clockwise for maximum receive gain 8 Adjust the CLARIFY control to clarify the SSB signals or to optimize AM signals 2 3 2 PROCEDURE TO TRANSMIT 1 Select the desired channel of transmission 2 Set the MIC GAIN control fully clockwise 3 If the channel is clear de...

Page 9: ...able Lead 1 Audio Shield 2 Audio Lead 3 Receive Control 4 Grounding 5 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 ...

Page 10: ...he first RF amplifier TR14 The RF signal is fed into the mixer TR15 and then into the AM IF section of the receiver depending on the mode of operation The signal is then detected by either the AM detector or product detector and then fed to the audio amplifier section of the receiver and finally out to the speaker 3 3 TRANSMITTER MODULATION CIRCUIT i The transmitter modulation circuit modulates th...

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Page 12: ...X mode Clarify setting in 12 o clock position Connect DC Voltmeter to TP9 R207 Connect Oscilloscope to TP10 R101 Connect Oscilloscope to TP1 R106 L19 L21 L20 2 5 VDC 0 1 CH 1 CH 40 Max Output and Balance AM Frequency Set radio to CH 1 AM RX mode Connect frequency counter to TP1 R106 L23 34 76500 MHz 20 Hz LSB Freq Set radio to CH 1 LSB RX mode Connect frequency counter to TP1 R106 L22 34 76350 MHz...

Page 13: ...n CH 1 and CH 40 4W SSB ALC Set radio to CH 19 USB TX mode Set Mic Gain fully clockwise AF signal 25 mV 1 KHz to microphone VR11 12 W SSB Carrier Balance Set radio to CH 19 USB TX mode Connect Oscilloscope to L44 TR39C Mic Gain off VR4 Spurious Emission to minimum AM Modulation Set radio to CH 19 AM TX mode Set Mic Gain fully clockwise AF signal 30 mV 1 KHz to microphone VR7 95 RF Power Meter Set ...

Page 14: ...MOD off VOL control fully clockwise RF SG setting 27 204 MHz Level 1 uV L12 L14 Audio output 4 5V S N 20 dB NB ANL Adjust Set radio to CH 20 AM RX mode RF SG setting 27 205 MHz Level 100 uV MOD 30 1KHz Set NB ANL OFF switch to NB ANL Connect Voltmeter to D2 Cathode L1 L2 DC voltage to max 1 5V AM Squelch Set radio to CH 20 AM RX mode Set SQ control at fully clockwise RF SG setting 27 205 MHz Level...

Page 15: ... 14 Figure 4 2 Receiver test setup ...

Page 16: ... 15 Figure 4 3 Main PCB Adjustment Location CHAPTER 5 ...

Page 17: ...pected without periodic inspection and maintenance Important points to be checked regularly are as follows Check Item Action Whip antenna option If cracked or broken replace it Coaxial cable If sheath is cracked seal with vinyl tape If immersed with water install new coaxial cable Coaxial power plug connections If loosened reconnect If corroded clean contacts Battery connection If corroded clean p...

Page 18: ...ts 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 3377 Carmel Mountain Road San Diego CA 92121 Tel 858 259 0287 Fax 858 259 0437 PART LIST ...

Page 19: ...59S ROTARY SW 3 R401 R414 RCU146814Z 680 ohm 1 4W 4 J402 WX01070705 JUMPER WIRE 5 J401 WX01070715 JUMPER WIRE 6 J403 WX01070712 JUMPER WIRE REMARK SOLDER SIDE BLUE PART LIST TR 296GK DX MIC P C B ITEM REFERENCE NUMBER RANGER PART NUMBER DESCRIPTION 1 EPT014840Z MIC P C B 2 C404 C407 CC0501027L 0 001µF 50V 3 L404 L405 ECBAD18558 BEAD COIL ...

Page 20: ...COMPONENT SIDE RIGHT SOLDER SIDE PART LIST TR 296GK DX CH DISPLAY P C B ITEM REFERENCE NUMBER RANGER PART NUMBER DESCRIPTION 1 EPT014821Z CH DISPLAY P C B 2 CH DISPLAY PCB EX03N40003 LED DISPLAY REMARK SOLDER SIDE BLUE ...

Page 21: ... 20 ...

Page 22: ... 21 TR 296GK DX MAIN PCB REMARK COMPONENT SIDE ...

Page 23: ... 22 TR 296GK DX MAIN PCB REMARK COPPER SIDE PART LIST TR 296GK DX MAIN PCB ...

Page 24: ...4B 150 Ω 1 4W R42 137 RCM141024B 1K Ω 1 4W R45 RCM141524B 1 5K Ω 1 4W R43 RCM141824B 1 8K Ω 1 4W R34 224 RCM143324B 3 3K Ω 1 4W R32 RCM143924B 3 9K Ω 1 4W R113 RCM141034B 10K Ω 1 4W R225 RCM141044B 100K Ω 1 4W R107 D53 RCP145604Z 56 Ω 1 4W R106 RCP141514Z 150 Ω 1 4W R212 RCP141524Z 1 5K Ω 1 4W R207 RCP142724Z 2 7K Ω 1 4W R101 RCP141034Z 10K Ω 1 4W R86 RCP144734Z 47K Ω 1 4W R178 RCP121034Z 10K Ω 1 ...

Page 25: ...IODE MA27W A L1 ECIFT12366 I F T L2 ECIFT12367 I F T L3 ECIFT12248 I F T L4 ECIFT12369 I F T L5 ECIFT12005 I F T L6 ECIFT12006 I F T L7 ECIFT12372 I F T L8 ECIFT12373 I F T L9 ECIFT12374 I F T L10 ECIFT12375 I F T L12 ECIFT12376 I F T L13 ECIFT12377 I F T L14 ECIFT12378 I F T L15 ECIFT12379 I F T L19 ECIFT12380 I F T L20 ECIFT12381 I F T L21 ECIFT12382 I F T L22 ECIFT12383 I F T L23 ECIFT12384 I F...

Page 26: ...ER SIDE RCP146804Z 68 Ω 1 4W MAIN COPPER SIDE WP0812005Z SHIELD WIRE FREQ COUNTER EX07N48793 WIRE CONN H DCx1 CC0501027L 0 001uF 50WV DCx1 CC0501037L 0 01uF 50WV DCx1 CC0502237L 0 022uF 50WV D49 EDNV00001Z DIODE NVS 01 D50 EDNV00002Z DIODE NVS 02 IC4 ENFU03756Z IC MB3756 IC6 ENTA07222A IC TA7222AP TR36 T2SC01969C TR 2SC1969C TR38 T2SC02166C TR 2SC2166C TR41 T2SD01135Z TR 2SD1135 ...

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Page 29: ...AT0296040A COPYRIGHT 1999 RANGER COMMUNICATIONS INC ...

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