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LORAL TERRACOM AN / PRC- 1 04(A) Technical Manual

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TM 11-5820-919-40-2
TECHNICAL MANUAL
GENERAL SUPPORT MAINTENANCE MANUAL
RADIO SET
AN / PRC- 1 04(A)
(NSN 5820-01-141-7953)
HEADQUARTERS, DEPARTMENT OF THE ARMY
15 JANUARY 1986

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Summary of Contents for LORAL TERRACOM AN / PRC- 1 04(A)

  • Page 1 TM 11-5820-919-40-2 TECHNICAL MANUAL GENERAL SUPPORT MAINTENANCE MANUAL RADIO SET AN / PRC- 1 04(A) (NSN 5820-01-141-7953) HEADQUARTERS, DEPARTMENT OF THE ARMY 15 JANUARY 1986...
  • Page 2 TM 11-5820-919-40-2 SAFETY STEPS TO FOLLOW IF SOMEONE IS THE VICTIM OF ELECTRICAL SHOCK DO NOT TRY TO PULL OR GRAB THE INDIVIDUAL IF POSSIBLE, TURN OFF THE ELECTRICAL POWER IF YOU CANNOT TURN OFF THE ELECTRICAL POWER, PULL, PUSH, OR LIFT THE PERSON TO SAFETY USING A DRY WOODEN POLE OR A DRY ROPE OR SOME OTHER INSULATING MATERIAL SEND FOR HELP AS SOON AS POSSIBLE AFTER THE INJURED PERSON IS FREE OF CONTACT WITH THE SOURCE OF ELECTRICAL SHOCK, MOVE THE PERSON A SHORT DISTANCE AWAY AND IMMEDIATELY START ARTIFICIAL RESUSCITATION...
  • Page 3 TM 11-5820-919-40-2 HIGH VOLTAGE is used in the operation of this equipment DEATH ON CONTACT may result if personnel fail to observe safety precautions Never work on electronic equipment unless there is another person nearby who is familiar with the operation and hazards of the equipment and who is competent in administering first aid.
  • Page 4 TM 11-5820-919-40-2 SAFETY SUMMARY The following are general safety precautions that are not related to any specific procedures and therefore do not appear elsewhere in this publication. These are recommended precautions that personnel must understand and apply during many phases of operation and maintenance. KEEP AWAY FROM LIVE CIRCUITS Operating personnel must at all times observe all safety regulations.
  • Page 5 TM 11-5820-919-40-2 WARNING Prior to performing the following functions all electrical power is to be removed from the system. External power disconnected and a "MAINTENANCE IN PROGRESS" tag attached or power switches will be locked out to prevent inadvertent energizing of the system. WARNING Lifting heavy equipment incorrectly can cause serious injury.
  • Page 6 TM 11-5820-919-40-2 Technical Manual HEADQUARTERS DEPARTMENT OF THE ARMY No. 11-5820-919-40-2 Washington, DC, 15 January 1986 GENERAL SUPPORT MAINTENANCE MANUAL RADIO SET AN/PRC-104A (NSN 5820-01-141-7953) REPORTING OF ERRORS AND RECOMMENDING IMPROVEMENTS You can help improve this manual. If you find any mistakes or if you know of a way to improve the procedures, please let us know.

  • Page 7: Table Of Contents

    TM 11-5820-919-40-2 TABLE OF CONTENTS Paragraph Page INTRODUCTION ..................1 APPENDIX A - REFERENCES ...............1 NOTE Maintenance Kit,OA-9169/GRC-213,ls available for Army use In maintaining this equipment. LIST OF ILLUSTRATIONS Figure Title Page Figure Title Page Radio Set Block Diagram (2 Sheets)............Synthesizer A1A3 Schematic..............

  • Page 8: Scope

    TM 11-5820-919-40-2 SECTION 0 GENERAL 0-1. SCOPE. This manual covers Radio Set AN/PRC-104(A). This manual provides instructions for general support maintenance. Throughout this manual AN/PRC-104 should be AN/PRC-104(A). 0-2. CONSOLIDATED INDEX OF ARMY PUBLICATIONS AND BLANK FORMS Refer to the latest issue of DA Pam 310-1 to determine whether there are new editions, changes or additional publications pertaining to the equipment.

  • Page 9: Introduction

    TM 11-5820-919-40-2 INTRODUCTION This technical manual provides maintenance prints for Radio Set ANtPRC-104 (radio set). It is used in conjunction with the general instructions, maintenance information, and theory contained with the general instructions, maintenance information, and theory contained in TM 11-5820-919-40-1. For parts ordering information refer to TM 11-5820-919-24P Maintenance prints are provided for the radio set;...
  • Page 10 TM 11-5820-919-40-2 Figure 1-1. Radio Set Block Diagram (Sheet 1 of 2)
  • Page 11 TM 11-5820-919-40-2 Figure 1-1. Radio Set Block Diagram (Sheet 2 of 2)
  • Page 12 TM 11-5820-919-40-2 Figure 1-2. Radio Set Power Distribution...
  • Page 13 TM 11-5820-919-40-2 SPECIAL TOOLS, MATERIALS, AND FABRICATED TEST CABLES AND FIXTURES Description Part Number Reference Audio Input/Keying Adapter Figure 3-11C Whip Adapter Figure 3-11D Kit, Tool, Electrons TK-100/G None Bench Repair Center Pace PRC-350C None Maintenance Kit, Printed Circuit MK-984/A None NOTE: Referenced figures are in TM 11-5820-919-40-1.
  • Page 14 TM 11-5820-919-40-2 RADIO SET PERFORMANCE TEST NOTE 1: Radio Set RF Signal Generator Frequency (kHz) Sideband Frequency (MHz) No. 1. a. 2,221.0 2.2220 2,221.0 2.2200 No. 2 a. 3,334.0 3.3350 3,334.0 3.3330 No. 3 a. 6,665.0 6.6660 6,665.0 6.6640 No. 4 a. 8,889.0 8.8900 8,889.0...
  • Page 15 TM 11-5820-919-40-2 Figure 1-4. Radio Set Performance Test (Sheet 2 of 2)
  • Page 16 TM 11 5820-919-40-2 TABLE A NOTE 5. SPURIOUS RECEIVE SIGNALS FREQ (MHz) FREQ (MHz) FREQ (MHz) FREQ (MHz) FREQ (MHz) 1. A spurious receive signal is an audio tone heard in the handset in receive when no tone should be present (i.e., no 2.2222 5.6250 12.0833...
  • Page 17 TM 11-5820-919-40-2 Figure 2-1. Receiver/Exciter A1 Interconnection Schematic...
  • Page 18 TM 11-5820-919-40-2 Figure 2-2. Receiver/Exciter A1 Component Location (Sheet 1of 2)
  • Page 19 TM 11-5820-919-40-2 ITEM DESCRIPTION ITEM DESCRIPTION Cover Assembly Multipin Connector ITEM DESCRIPTION Screw, Captive A1A4P1 (8 places) Captive Allen Screw Printed Wiring Board Screw, Captive (2 places) Connector, Receptacle (4 places) Printed Wiring Board Diode Harmonic Filter Ribbon Cable Assembly Lead Socket Module A1A2 RF Cables A1A2J2(W1)
  • Page 20 Figure 2-3. Receiver/Exciter A1 Performance Test Setup TM 11-5820-919-40-2 SPECIAL TOOLS, MATERIALS, AND FABRICATED TEST CABLES AND FIXTURES Description Part Number Reference • • • Audio Input/Keying Adapter Figure 3-11C • • • Lip Adapter Figure 3-11D Kit, Tool, Electronic TK-100/G None Bench Repair Center...
  • Page 21 TM 11-5820-919-40-2 RECEIVER/EXCITER PERFORMANCE TEST NOTE 1: Radio Set RF Signal Generator Frequency (kHz) Sideband Frequency (MHz) No. 1. a. 2,221.0 2.222 2,221.0 2.220 No. 2. a. 3,334.0 3.335 3,334.0 3.333 No. 3. a. 6,665.0 6.666 6,665.0 6.664 No. 4. a. 8,889.0 8.890 8,889.0...
  • Page 22 TM 11-5820-919-40-2 Figure 2-4. Receiver/Exciter A1 Performance Test (Sheet 2 of 2)

  • Page 23: Modulator/Demodulator A1A1 Schematic

    TM 11-5820-919-40-2 Figure 3-1. Modulator/Demodulator A1A1 Schematic...
  • Page 24 TM 11-5820-919-40-2 Figure 3-2. Modulator/Demodulator A1A1 Component Location (Sheet 1 of 2)
  • Page 25 ITEM DESCRIPTION ITEM DESCRIPTION Modulator/Demodulator Diode Assembly Diode Connector, Coaxial, RF Diode Core, EM Resistor Resistor Capacitor Resistor Capacitor Resistor Capacitor Strap, Handle Capacitor Connector, Receptacle Capacitor Resistor Variable Capacitor Resistor Capacitor Capacitor Resistor Capacitor Resistor, Variable Connector, Coaxial, RF Resistor Capacitor Resistor...
  • Page 26 TM 11-5820-919-40-2 Figure 3-3. Modulator/Demodulator A1A1 Performance Test and Alignment Setup SPECIAL TOOLS, MATERIALS, AND FABRICATED TEST CABLES AND FIXTURES Description Part Number Reference Modulator/Demodulator Test Extender Cable Figure 3-10A RF Coax Cable (2 each) Figure 3-11A RF Extender Cable (3 each) Figure 3-11B Audio Input/Keying Adapter Figure 3-11C...
  • Page 27 TM 11-5820-919-40-2 Figure 3-4. Modulator/Demodulator A1A1 Performance Test (Sheet 1 of 4)
  • Page 28 TM 11-5820-919-40-2 Figure 3-4. Modulator/Demodulator A1A1 Performance Test (Sheet 2 of 4)
  • Page 29 TM 11-5820-919-40-2 Figure 3-4. Modulator/Demodulator A1A1 Performance Test (Sheet 3 of 4)
  • Page 30 TM 11-5820-919-40-2 Figure 3-4. Modulator/Demodulator A1A1 Performance Test (sheet 4 of 4)
  • Page 31 TM 11-5820-919-40-2 MODULATOR/ DEMODULATOR A1A1 ALIGNMENT The alignment procedure is to be used an either of these situations: (1) the performance test calls a potentiometer out of adjustment, or (2) one of the following is replaced: 1. First Converter, A1A1A1 2.
  • Page 32 TM 11-5820-919-40-2 TABLE 3-1. Selected Resistors for Mod/Demod R13, R14 & R15 Transmit fixed 50Ω pad adjustment. Refer to modulator/demodulator A1A1 alignment. (Prior to replacing R13, 14, 15, examine these resistors on modulator/demodulator, record individual values for reference.) Pad Attenuation Resistor Values (OHMs) 3 db 4 db...
  • Page 33 TM 11-5820-919-40-2 Figure 3-5. First Frequency Converter A1A1A1 Schematic...
  • Page 34 TM 11-5820-919-40-2 Figure 3-6. First Frequency Converter A!A!A! Component Location (Sheet 1 of 2)
  • Page 35 TM 11-5820-919-40-2 ITEM DESCRIPTION ITEM DESCRIPTION A1A1A1 First Frequency Resistor Converter Resistor (755002A0230) Resistor Relay, Electromagnetic Capacitor Diode Resistor Diode Inductor Capacitor Capacitor Resistor Capacitor Resistor Inductor Capacitor Capacitor Transistor Inductor Inductor Capacitor Capacitor Inductor Resistor Resistor Capacitor Capacitor Diode Coil, RF Capacitor Inductor...
  • Page 36 TM 11-5820-919-40-2 Figure 3-7. Frequency Converter A1A1A1, A1A1A2, A1A1A3 Performance Test Setup SPECIAL TOOLS, MATERIALS, AND FABRICATED TEST CABLES AND FIXTURES Description Part Number Reference RF Coax Cable (2 each) Figure 3-11A RF Extender Cable (3 each) Figure 3-11B Audio Input/Keying Adapters Figure 3-11C Modulator/Demodulator Test Figure 3-10A...
  • Page 37 TM 11-5820-919-40-2 Figure 3-8. First Frequency Converter A1A1A1 Performance test 29/(30 blank)
  • Page 38 TM 11-5820-919-40-2 Figure 3-9. Second Frequency Converter A1A1A2 Schematic...
  • Page 39 TM 11-5820-919-40-2 Figure 3-10. Second Frequency Converter A1A1A2 Component Location (Sheet 1 of 2)
  • Page 40 TM 11-5820-919-40-2 ITEM DESCRIPTION ITEM DESCRIPTION A1A1A2 Second Frequency Transistor Converter Resistor (755002A0237) Capacitor Resistor Resistor Capacitor Coil Transistor Resistor Capacitor Capacitor Capacitor Transformer, RF Resistor Resistor Capacitor Resistor Resistor Transistor Resistor Resistor Relay, Electromagnetic Capacitor Capacitor Capacitor Inductor Capacitor Capacitor Resistor Capacitor...

  • Page 41: Second Frequency Converter A1A1A2 Performance Test

    TM 11-5820-919-40-2 Figure 3-11. Second Frequency Converter A1A1A2 Performance Test...
  • Page 42 TM 11-5820-919-40-2 Figure 3-12. Third Frequency Converter A1A1A3 Schematic...
  • Page 43 TM 11-5820-919-40-2 Figure 3-13. Third Frequency Converter A1A1A3 Components Location (Sheet 1 of 2)
  • Page 44 TM 11-5820-919-40-2 ITEM Description ITEM DESCRIPTION A1A1A3 Third Frequency Relay, Electromagnetic Converter Resistor (755002A0343) Capacitor Coil, RF Resistor Capacitor Capacitor Mixer, RF Resistor Resistor Capacitor Capacitor Microcircuit Inductor Resistor Capacitor Capacitor Inductor Capacitor Capacitor Capacitor Resistor Capacitor Resistor Capacitor Transistor Capacitor Resistor Capacitor...
  • Page 45 TM 11-5820-919-40-2 Figure 3-14. Third Frequency Converter A1A1A3 Performance test...

  • Page 46: Harmonic Filter A1A2 Schematic

    TM 11-5820-919-40-2 NOTES: UNLESS OTHERWISE SPECIFIED 1. PARTIAL REF DESIGNATIONS ARE SHOWN FOR COMPLETE DESIGNATION PREFIX WITH A1A2 2. CAPACITANCE VALUES ARE IN PICOFARADS +5%, 500V 3. INDUCTOR RESONANT FREQ. ARE IN MEGAHERTZ (MHz). ALL RELAYS EXCEPT FOR FL1-K ARE SHOWN DE-ENERGIZED.

  • Page 47: Harmonic Filter A1A2 Component Location

    TM 11-5820-919-40-2 Figure 4-2. Harmonic Filter A1A2 Component Location ITEM DESCRIPTION A1A2 Harmonic Filter Assembly Capacitor Inductor Capacitor Inductor Capacitor Capacitor Diode Resistor, Variable Inductor Resistor, Variable Resistor Connector, Coaxial, RF Capacitor Diode Capacitor Resistor Capacitor Capacitor Connector, Coaxial, RF Connector, Receptacle, Electric Strap, Handle...
  • Page 48 TM 11-5820-919-40-2 SPECIAL TOOLS, MATERIALS, AND FABRICATED TEST CABLES AND FIXTURES Description Part Number Reference • • • Harmonic Filter/Power Amplifier Figure 3-1OD Test Extender Cable • • • RF Coax Cable (2 each) Figure 3-11A • • • Audio Input/Keying Adapter Figure 3-110 Kit, Tool, Electronic TK-100/G...
  • Page 49 TM 11-5820-919-40-2 Figure 4-4. Harmonic Filter A1A2 Performance Test (Sheet 1 of 3) HARMONIC FILTER PERFORMANCE TEST NOTE 1: The narrowband criterion is a maximum of 1.8 db insertion loss in the passband. A shorting bar, connected between the two fabricated rf cables, should be used to achieve a 0-db reference.
  • Page 50 TM 11-5820-919-40-2 Figure 4-4. Harmonic Filter A1A2 Performance Test (Sheet 2 of 3)
  • Page 51 TM 11-5820-919-40-2 Figure 4-4. Harmonic Filter A1A2 Performance Test (Sheet 3 of 3)
  • Page 52 TM 11-5820-919-40-2 SPECIAL TOOLS, MATERIALS, AND FABRICATED TEST CABLES AND FIXTURES Description Part Number Reference • • • Harmonic Filter/Power Amplifier Test Figure 3-10D Extender Cable of-40-1 • • • RF Coax Cable (2 each) Figure 3-11A of -40-1 RF Coax Cable ( 1 each) Figure 3-11B of -40-1 NOTE: Referenced figures are in TM 11-5820-919-40-1.
  • Page 53 TM 11-5820-919-40-2 HARMONIC FILTER A1A2 ALIGNMENT The alignment procedure is to be used in either of these d situations: (1) the performance test calls a potentiometer out of adjustments or (2) the following is replaced: RF Detector T1, CRT, CR2, C1, C2, C3, and C4. The procedure consists of a preliminary setup and an adjustment procedure.

  • Page 54: Synthesizer A1A3 Schematic

    TM 11-5820-919-40-2 NOTES: UNLESS OTHERWISE SPECIFIED 1. CAPACITANCE VALUES ARE IN MICROFARADS 10% l 00 V 2. RESISTANCE VALUES ARE IN OHMS 1/IIW 3. ALL DIODES ARE JAN1 N4148 4. FOR SIGNAL INPUT/OUTPUT ROUTING REFER TO FIGURE 2-1 5. PARTIAL REF DESIGNATION ARE SHOWN FOR COMPLETE DESIGNATION PREFIX WITH A1A3 6.
  • Page 55 TM 11-5820-919-40-2 Figure 5-2. Synthesizer A1A3 Component Location (Sheet 1 of 2)
  • Page 56 TM 11-5820-919-40-2 ITEM DESCRIPTION ITEM DESCRIPTION A1A3 Synthesizer Assembly FL1B Filter, Bandpass Capacitor Capacitor Capacitor Capacitor Capacitor Microcircuit Capacitor Microcircuit Microcircuit Transistor Capacitor Capacitor Resistor Transistor Resistor Capacitor Resistor Microcircuit Resistor Microcircuit Resistor Transistor Resistor Microcircuit Resistor Capacitor Resistor Capacitor Resistor Transistor Resistor...

  • Page 57: Synthesizer A1A3 Performance Test And Alignment Setup

    TM 11-5820-919-40-2 NOTES: SPECIAL TOOLS, MATERIALS, AND FABRICATED TEST CABLES AND FIXTURES EQUIVALENT TEST EOUIPMENT MAY BE USED USE ONLY TEST EQUIPMENT THAT L PROPERLY CALIBRATED FAILURE TO DO SO MAY PROVIDE Description Part Number Reference ERRONEOUS OR MISLEADING PERFORMANCE OR FAULT INDICATIONS.
  • Page 58 TM 11-5820-919-40-2 SYNTHESIZER PERFORMANCE TEST NOTE 1: Spurious signal applies between 4.995 and 5.005 MHz. Set spectrum analyzer at: Log Reference Level 10 db Linear Sensitivity Bandwidth 1 kHz Scan Width 10 kHz/div Scan Time 2 sec/div. Video Falter 10 Hz Center Frequency 5 MHz 10 db Log...
  • Page 59 TM 11-5820-919-40-2 Figure 5-4. Synthesizer A1A3 Performance Test (Sheet 2 of 2)

  • Page 60: Synthesizer A1A3 Alignment

    TM 11-5820-919-40-2 SYNTHESIZER A1A3 ALIGNMENT The alignment procedure is to be used whenever TCXO U1, VCO U3, or 1lmlter U7 is replaced or whenever the first LO, second LO, or TCXO output frequency or power is out of alignment. The procedure consists of preliminary setup and adjustment.
  • Page 61 TM 11-5820-919-40-2 NOTES: UNLESS OTHERWISE SPECIFIED DIODES ARE JAN1N4148. RESISTANCE VALUES ARE IN OHMS ±5%, 1/2W. TRANSISTORS ARE JAN2N2222A. DS1 THROUGH DS6 ARE PART OF SWITCH ASSEMBLY S1 THROUGH S6 RESPECTIVELY. PARTIAL REF DESIGNATIONS ARE SHOWN FOR COMPLETE DESIGNATION PREFIX WITH A1A4. CAPACITANCE VALUES ARE IN MICROFARADS ±10%.
  • Page 62 TM 11-5820-919-40-2 Figure 6-1. Control Panel A1A4 Schematic (Sheet 2 of 2)
  • Page 63 TM 11-5820-919-40-2 ITEM DESCRIPTION Panel Connector Ring (2 places) Deleted Allen Screw (2 places) SB Switch Knob Retainer (threaded) Allen Screw N Light switch Knob Mode Switch Knob Allen Screw (2 places) Deleted Volume Knob Allen Screw (2 places) Screw, Captive (6 places) Deleted Gasket Gasket...
  • Page 64 TM 11-5820-919-40-2 ITEM DESCRIPTION Audio Filter, A1A4 Inductor, Filter Connector, Audio Capacitor Capacitor Inductor, Filter Inductor, Filter Capacitor Capacitor Connector, Audio Inductor, Filter Capacitor Capacitor Capacitor Capacitor Control Panel Circuit Card Assembly Machined Board Transistor Mounting Pad Transistor Mounting Pad Microcircuit Diode Resistor...

  • Page 65: Control Panel A1A4 Performance Test Setup

    TM 11-5820-919-40-2 Figure 6-3. Control Panel A1A4 Performance Test Setup SPECIAL TOOLS, MATERIALS, AND FABRICATED TEST CABLES AND FIXTURES Description Part Number Reference Kit, Tool, Electronic TK-100/G None Bench Repair Center Pace PRC-350C None Maintenance Kit, Printed Circuit MK-984/A None TEST EQUIPMENT Name Designation...
  • Page 66 TM 11-5820-919-40-2 NOTES 1. UNLESS OTHERWISE SPECIFIED, ALL VOLTAGE MEASUREMENTS TAKEN WITH RESPECT TO CHASSIS GROUND. 2 LOGIC LEVELS CAN BE VERIFIED FASTER BY USING AN OSCILLOSCOPE IN PLACE OF DVM. Figure 6-4. Control Panel A1A4 Performance Test (Sheet 1 of 4)
  • Page 67 TM 11-5820-919-40-2 Figure 6-4. Control Panel A1A4 Performance Test (Sheet 2 of 4)
  • Page 68 TM 11-5820-919-40-2 Figure 6-4. Control Panel A1A4 Performance Test (Sheet 3 of 4)
  • Page 69 TM 11-5820-919-40-2 Figure 6-4. Control Panel A1A4 Performance Test (Sheet 4 of 4)

  • Page 70: Power Supply A1A5 Schematic

    TM 11-5820-919-40-2 Figure 7-1. Power Supply A1A5 Schematic...
  • Page 71 TM 11-5820-919-40-2 Figure 7-2. Power Supply A1A5 Component Location (Sheet 1 of 2)
  • Page 72 TM 11-5820-919-40-2 ITEM DESCRIPTION ITEM DESCRIPTION Core, EM Core, EM A1A5 Power Supply Assembly Core, EM Core, EM Microcircuit Capacitor Core, EM Microcircuit Transistor Resistor Microcircuit Capacitor Resistor Capacitor Resistor Resistor, Variable Diode Resistor Capacitor Capacitor Resistor Resistor Connector, PCB Strap, Handle Capacitor Capacitor...
  • Page 73 TM 11-5820-919-40-2 SPECIAL TOOLS, MATERIALS, AND FABRICATED TEST CABLES AND FIXTURES Description Part Number Reference Synthesizer Test Extender Cable Figure 3-10C Audio Input/Keying Adapter Figure 3-11C RF Extender Cable Figure 3-11B Kit Tool, Electronic TK-100/G None Bench Repair Center Pace PRC-350C None Maintenance Kit, Printed Circuit MK-984/A...
  • Page 74 TM 11-5820-919-40-2 POWER SUPPLY PERFORMANCE TEST NOTE 1: If volume differs by a small amount, refer to alignment of R17. NOTE 2: If voltage differs by a small amount, refer to alignment of R24.. NOTE 3: Unless otherwise specified, all voltage measurements taken with respect to chassis ground.
  • Page 75 TM 11-5820-919-40-2 Figure 7-4. Power Supply A1A5 Performance Test (Sheet 2 of 2)

  • Page 76: Power Supply A1A5 Alignment

    TM 11-5820-919-40-2 POWER SUPPLY A1A5 ALIGNMENT The alignment procedure is to be used in either of these situations: (1) the performance test calls a potentlometer out of adjustment, or (2) one of the following is replaced: 1. Timers U1. U2 2.
  • Page 77 TM 11-5820-919-40-2 Figure 8-1. Amplifier/Coupler A2 Schematic...
  • Page 78 TM 11-5820-919-40-2 Figure 8-2. Amplifier/Coupler A2 Component Location (Sheet 1 of 2)
  • Page 79 TM 11-5820-919-40-2 ITEM DESCRIPTION ITEM DESCRIPTION Cover Assembly Screw (2 places) Capacitor (2 places) Screw, Captive (8 places) Screw, Captive (4 places) Gasket Amplifier/Coupler Gasket Terminal Housing A2 Latch RF Cables A1J1 (W1P1), A1J2 (W1P3) Mounting Screw (2 places) Marker Ribbon Cable Support Terminal Marker...

  • Page 80: Amplifier/Coupler A2 Performance Test Setup

    TM 11-5820-919-40-2 SPECIAL TOOLS, MATERIALS, AND FABRICATED TEST CABLES AND FIXTURES Description Part Number Reference Audio Input/Keying Adapter Figure 3-11C Whip Adapter Figure 3-11D Kit, Tool, Electronic TK-100/G None Bench Repair Center Pace PRC-350C None Maintenance Kit, Printed Circuit MK-984/A None NOTE: Referenced figures are in TM 11-5820-919-40-1 TEST EQUIPMENT...

  • Page 81: Amplifier/Coupler A2 Performance Test

    TM 11-5820-919-40-2 Figure 8-4. Amplifier/Coupler A2 Performance Test...
  • Page 82 TM 11-5820-919-40-2 Figure 9-1. Power Amplifier A2A1 Schematic (Sheet 1 of 2)
  • Page 83 TM 11-5820-919-40-2 Figure 9-1. Power Amplifier A2A1 Schematic (Sheet 2 of 2)
  • Page 84 TM 11-5820-919-40-2 Figure 9-2. Power Amplifier A2A1 Component Location (Sheet 1 of 3)
  • Page 85 TM 11-5820-919-40-2 Figure 9-2. Power Amplifier A2A1 Component Location (Sheet 2 of 3)
  • Page 86 TM 11-5820-919-40-2 ITEM DESCRIPTION ITEM DESCRIPTION ITEM DESCRIPTION ITEM DESCRIPTION ITEM DESCRIPTION ITEM DESCRIPTION A (Top board) Transformer Resistor D (Bottom Board) Resistor Transistor Capacitor Resistor Transistor Transistor A2A1 Power Amplifier Assembly Resistor CR25 Diode A2A1 Power Amplifier Assembly Capacitor Resistor CR15 Diode...

  • Page 87: Power Amplifier A2A1 Performance Test And Alignment Setup

    TM 11-5820-919-40-2 SPECIAL TOOLS, MATERIALS, AND FABRICATED TEST CABLES AND FIXTURES Description Part Number Reference Harmonic Filter/Power Amplifier Figure 3-10D Test Extender Cable Audio Input/Keying Adapter Figure 3-11C RF Coax Cable Figure 3-11A Kit, Tool, Electronic TR-100/G None Bench Repair Center Pace PRC-350C None Maintenance Kit, Printed Circuit...
  • Page 88 TM 11-5820-919-40-2 Figure 9-4. Power Amplifier A2A1 Performance Test (Sheet 1 of 3)
  • Page 89 TM 11-5820-919-40-2 Figure 9-4. Power Amplifier A2A1 Performance Test (Sheet 2 of 3)
  • Page 90 TM 11-5820-919-40-2 Figure 9-4. Power Amplifier A2A1 Performance Test (Sheet 3 of 3)

  • Page 91: Power Amplifier A2A1 Alignment

    TM 11-5820-919-40-2 POWER AMPLIFIER A2A1 ALIGNMENT The alignment procedure is to be used in either of these situations: (1) the performance test calls a potentiometer out of adjustment, or (2) one of the following is replaced: Overshoot Control AR3, AR4 ALC, AR3 Buffers ART, AR2 Power Transistors Q3, Q6, Q10, Q11...
  • Page 92 TM 11-5820-919-40-2 Figure 10-1 Antenna Tuner A2A2 Schematic (Sheet 1 of 2)
  • Page 93 TM 11-5820-919-40-2 Figure 10-1 Antenna Tuner A2A2 Schematic (Sheet 2 of 2)
  • Page 94 TM 11-5820-919-40-2 Figure 10-2. Antenna Tuner A2A2 Component Location (Sheet 1 of 3)
  • Page 95 TM 11-5820-919-40-2 Figure 10-2. Antenna Tuner A2A2 Component Location (Sheet 2 of 3)
  • Page 96 TM 11-5820-919-40-2 ITEM DESCRIPTION ITEM DESCRIPTION ITEM DESCRIPTION ITEM DESCRIPTION CR21 Diode Resistor CR14 Diode Resistor Resistor CR23 Diode Resistor Resistor CR21 Diode A2A2 Antenna Tuner Assembly TOP Transistor CR20 Diode Transistor CR22 Diode Transistor Coil Transistor CR13 Diode CR19 Diode Transistor CR20...

  • Page 97: Antenna Tuner A2A2 Performance Test Setup

    TM 11-5820-919-40-2 SPECIAL TOOLS, MATERIALS, AND FABRICATED TEST CABLES AND FIXTURES Description Part Number Reference Antenna Tuner Test Extender Cable Figure 3-10B Audio Input/Keying Adapter Figure 3-11C Kit, Tool, Electronic TR-100/G None Bench Repair Center Pace PRC-350C None Maintenance Kit, Printed Circuit MK-984/A None NOTE: Referenced figures are in TM 11-5820-919-40-1.
  • Page 98 TM 11-5820-919-40-2 ANTENNA TUNER PERFORMANCE TEST NOTE 1: Changing the MODE switch from V-TR to V-RCV to V-TR causes a tune start signal to be routed from the modulator/demodulator. This will cause all capacitive and inductive elements to be removed from the rf pathway. When PIT or CW key is closed.
  • Page 99 TM 11-5820-919-40-2 Figure 10-4. Antenna Tuner A2A2 Performance Test (Sheet 2 of 3)
  • Page 100 TM 11-5820-919-40-2 Figure 10-4. Antenna Tuner A2A2 Performance Test (Sheet 3 of 3)
  • Page 101 TM 11-5820-919-40-2 SPECIAL TOOLS, MATERIALS, AND FABRICATED TEST CABLES AND FIXTURES Description Reference 100-Ohm Load Figure 3-11E 130-Ohm Load Figure 3-11F RF Coax Cable Figure 3-11A Audio Input/Keying Adapter Figure 3-11C NONE: Referenced figures are in TM 11-5820-919-40-1. TEST EQUIPMENT Name Designation Quantity...

  • Page 102: Antenna Tuner A2A2 Alignment

    TM 11-5820-919-40-2 ANTENNA TUNER A2A2 ALIGNMENT The alignment procedure is to be used in either of these situations: (1) the performance test calls a potentiometer out of adjustment, or (2) one of the following is replaced: Comparator/Control Hybrid A1 RF Sensor Bridge The procedure consists of a preliminary setup and adjustment procedure.
  • Page 103 TM 11-5820-919-40-2 APPENDIX A REFERENCES AR 55-38 Reporting of Transportation Discrepancies in Shipments AR 735-11-2 Reporting of Item and Packaging Discrepancies DA Pam 310-1 Consolidated Index of Army Publications and Blank Forms DA Pam 738-750 The Army Maintenance Management System (TAMMS) TM 11-582919-24P Organizational, Direct Support, and General Support Maintenance Repair Parts and Special Tools List for Radio Set AN/PRC-104A...
  • Page 105 PIN: 059437...

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