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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. Mail your letter, DA Form 2028 (Recommended Changes to Publications and Blank Forms), or DA Form 2028-2 located
in the back of this manual direct to: Commander, US Army Communications-Electronics Command and Fort Monmouth, ATTN:
AMSELME-MP, Fort Monmouth, NJ 07703-5007. A reply will be furnished to you.

TABLE OF CONTENTS

Section

Page

WARNINGS ................................................................................................................................................................... A through D

O GENERAL ................................................................................................................................................................... 0-1
0-1

Scope ......................................................................................................................................................... 0-1

0-2

Consolidated Index of Army Publications and Blank Forms ........................................................................ 0-1

0-3

Maintenance Forms, Records and Reports ................................................................................................ 0-1

0-4

Reporting Equipment Improvement Recommendations ............................................................................. 0-1

0-5

Administrative Storage................................................................................................................................ 0-1

0-6

Destruction of Army Electronics Materiel .................................................................................................... 0-1

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Summary of Contents for 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: ...ER 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 5 1 2 3 4 5 A ...

Page 3: ... shut off before beginning work on the equipment Take particular care to ground every capacitor likely to hold a dangerous potential When working inside the equipment after the power has been turned off always ground every part before touching it Be careful not to contact high voltage connections or 115 volt ac input connections when installing or operating this equipment Whenever the nature of th...

Page 4: ...losure for the purpose of servicing or adjusting the equipment except in the presence of someone who is capable of rendering aid RESUSCITATION FIRST AID Each person engaged in electrical operations will be trained in first aid particularly in the technique of mouth to mouth resuscitation and closed chest heart massage FM 21 11 The following warnings appear in this volume and are repeated here for ...

Page 5: ... 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 Do not try to lift more than 35 pounds by yourself Get a helper Bend legs while lifting Don t support heavy weight with your back D ...

Page 6: ...Form 2028 Recommended Changes to Publications and Blank Forms or DA Form 2028 2 located in the back of this manual direct to Commander US Army Communications Electronics Command and Fort Monmouth ATTN AMSELME MP Fort Monmouth NJ 07703 5007 A reply will be furnished to you TABLE OF CONTENTS Section Page WARNINGS A through D O GENERAL 0 1 0 1 Scope 0 1 0 2 Consolidated Index of Army Publications and...

Page 7: ...A5 Performance Test 2 Sheets 67 3 5 First Frequency Converter A1A1A1 Schematlc 25 Power Supply A1A5 Alignment 69 3 6 First Frequency Converter A1A1A1 Component Location 2 Sheets 26 3 7 Frequency Converter A1A1A1 A1A1A2 A1A1A3 Performance Test Setup 28 8 1 Amplifler CouplerA2 Schematic 71 3 8 First Frequency Converter A1A1A1 Performance Test 29 8 2 Amplifier Coupler A2 Component Location 2 Sheets 7...

Page 8: ...t and forward Discrepancy in Shipment Report DISREP SF 361 as prescribed in AR 55 38 NAVSUPINST 4610 33C AFR 75 18 MCO P4610 19 DLAR 4500 15 0 4 REPORTING EQUIPMENT IMPROVEMENT RECOMMENDATIONS EIR If your Radio Set AN PRC 104 A needs improvement let us know Send us an EIR You the user are the only one who can tell us why you don t like the design Put it on an SF 368 Quality Deficiency Report Mail ...

Page 9: ... malfunction or faulty test indication All electrical connections should be double checked before proceeding with test or fault isolation TECHNICAL CHARACTERISTICS Characterlstlc Description RADIO SET AN PRC 104 Radio Set Frequency Range 2 0000 to 29 9999 MHz in 0 0001 MHz 100 Hz increments 280 000 possible frequency settings Frequency Accuracy 1 ppm for 51 F 46 C to 160 F 71 C 2 to 30 Hz of setti...

Page 10: ...TM 11 5820 919 40 2 Figure 1 1 Radio Set Block Diagram Sheet 1 of 2 2 ...

Page 11: ...TM 11 5820 919 40 2 Figure 1 1 Radio Set Block Diagram Sheet 2 of 2 3 ...

Page 12: ...TM 11 5820 919 40 2 Figure 1 2 Radio Set Power Distribution 4 ...

Page 13: ...r AN URM 127 1 VTVM AN USM 116 1 Dummy Load 50 ohm DA 553 4 1 Signal Generator RF AN USH 323 1 Digital Multimeter AN USM 341 1 DVM oh meter function Attenuator Step CN 1128 U 1 10 db steps 0 5w 50 ohm Watt Meter RF Power Meter Hewlett Packard HP 435A 1 Thermocouple Power Hewlett Packard HP 8482A 1 Sensor Spectrum Analyzer Hewlett Packard HP 141 T 1 High Resolution Hewlett Packard HP 8552B 1 IF Sec...

Page 14: ...8 889 0 USB 8 8900 b 8 889 0 LS 8 8880 No 5 a 15 554 0 USB 15 5550 b 15 554 0 LSB 15 5530 No 6 a 27 778 0 USB 27 7790 b 27 778 0 LSB 27 7770 NOTE 2 Harmonic filter bands are 2 3 MHz 3 5 MHz 5 8 MHz 8 12 MHz 12 20 MHz and 20 30 MHz NOTE 3 For a thorough test use all the test frequencies listed in Note 1 on USB only NOTE 4 Frequency must be changed each tine to cause tune up tone when PIT is closed ...

Page 15: ...TM 11 5820 919 40 2 Figure 1 4 Radio Set Performance Test Sheet 2 of 2 7 ...

Page 16: ...one produced would be 1 4 KHz TABLE A FREQ MHz FREQ MHz FREQ MHz FREQ MHz FREQ MHz 2 2222 5 6250 12 0833 17 7777 25 3571 2 5000 5 7143 12 5000 17 9167 25 4167 2 9412 5 8000 12 7273 17 9169 25 5555 3 0555 5 8333 12 8125 18 6666 25 6250 3 1250 6 0000 12 9167 18 7500 25 7143 3 3333 6 1338 13 1250 18 8235 26 0000 3 4375 6 2500 13 3333 18 8888 26 2500 3 5294 6 6666 13 5000 19 0909 26 3636 3 7500 7 0833...

Page 17: ...Figure 2 1 Receiver Exciter A1 Interconnection Schematic 9 TM 11 5820 919 40 2 ...

Page 18: ...TM 11 5820 919 40 2 Figure 2 2 Receiver Exciter A1 Component Location Sheet 1of 2 10 ...

Page 19: ...m 12 Cover Assembly 36 Connector Stud 13 Screw Captive 37 Multipin Connector 8 places A1A3J3 14 Screw Captive 38 Mounting Screw 4 places 2 places 15 Power Supply Module 39 Mounting Screw A1A5 2 places 16 Multipin Connector 40 Multipin Connector A1A5P1 A1A1J2 41 Ribbon Cable Assembly 17 RF Cables A1A1J1 W2 A1W1 A1A1J2 W3 42 Circuit Board Mounting A1A1J3 W1P2 Screws A1len A1A1J4 W4 4 places 18 Modul...

Page 20: ...r AN URM 127 1 VTVM AN USM 116 1 Dummy Load 50 ohm DA 553 4 1 Signal Generator RF AN USM 323 1 Digital Multimeter AN USM 341 1 DVM ohmmeter function Attenuator Step CN 1128 U 1 10 db steps 0 5w 50 ohm Watt Meter RF Power Meter Hewlett Packard HP 435A 1 Thermocouple Power Hewlett Packard HP 8482A 1 Sensor Spectrum Analyzer Hewlett Packard HP 141 T 1 High Resolution Hewlett Packard HP 8552B 1 IF Sec...

Page 21: ...No 5 a 15 554 0 USB 15 555 b 15 554 0 LSB 15 553 No 6 a 27 778 0 USB 27 779 b 27 778 0 LSB 27 777 NOTE 2 Harmonic bands are 2 3 MHz 3 5 MHz 5 8 MHz 8 12 MHz 12 20 MHz and 20 30 MHz NOTE 3 Replace original modules in reverse order except for the faulty module and listen for tone in handset Otherwise the good modules would be con demned as faulty NOTE 4 Frequency must be changed or mode changed each...

Page 22: ...TM 11 5820 919 40 2 Figure 2 4 Receiver Exciter A1 Performance Test Sheet 2 of 2 14 ...

Page 23: ...TM 11 5820 919 40 2 Figure 3 1 Modulator Demodulator A1A1 Schematic 15 ...

Page 24: ...TM 11 5820 919 40 2 Figure 3 2 Modulator Demodulator A1A1 Component Location Sheet 1 of 2 A B 16 ...

Page 25: ...EM C12 Capacitor E5 Core EM FL1 Filter Bandpass C26 Capacitor J3 Connector Coaxial RF E1 Core EM E3 Core EM ITEM DESCRIPTION B CR4 Diode CR3 Diode CR2 Diode R13 Resistor R14 Resistor R15 Resistor R22 Resistor 2 Strap Handle P1 Connector Receptacle R29 Resistor Variable R23 Resistor R25 Resistor R8 Resistor Variable R26 Resistor R27 Resistor R21 Resistor CR1 Diode CR6 Diode R12 Resistor Variable R1...

Page 26: ...27 1 VTVM AN USM 116 1 Dummy Load 50 ohm DA 553 4 1 Signal Generator RF AN USM 323 1 Oscilloscope Storage Hewlett Packard BP 1741A 1 Digital Multimeter AN USM 361 1 DVM ohmmeter function Attenuator Step CN 1128 U 1 10 db steps 0 5w 50 ohm Watt Meter Power Meter Hewlett Packard HP 435A 1 Thermocouple Power Sensor Hewlett Packard HP 8482A 1 Spectrum Analyzer Hewlett Packard HP 141 T 1 High Resolutio...

Page 27: ...TM 11 5820 919 40 2 Figure 3 4 Modulator Demodulator A1A1 Performance Test Sheet 1 of 4 19 ...

Page 28: ...TM 11 5820 919 40 2 Figure 3 4 Modulator Demodulator A1A1 Performance Test Sheet 2 of 4 20 ...

Page 29: ...TM 11 5820 919 40 2 Figure 3 4 Modulator Demodulator A1A1 Performance Test Sheet 3 of 4 21 ...

Page 30: ...TM 11 5820 919 40 2 Figure 3 4 Modulator Demodulator A1A1 Performance Test sheet 4 of 4 22 ...

Page 31: ...Connect the audio oscillator R13 R14 and R15 as necessary in order supply for 6VDC at J1 11 Remove probe is the gate to ground with a jumper wire to the step attenuator Monitor the out meet the requirements of step 3 And turn on the radio set Inject 6V to put of the step attenuator with the DVM P 1 11 close CW key 5 Adjust receive audio level adjust shunted with 150 ohms and adjust the level 5 Ope...

Page 32: ...esistor Values OHMs DB R13 R14 R15 3 db 4 db 5 db 6 db 7 db 8 db 9 db 10 db 11 db 12 db 13 db 300 220 180 150 130 110 110 91 91 82 82 18 24 30 36 43 51 62 68 82 91 110 300 220 180 150 130 110 110 91 91 82 82 Ω OHMs Military No 18 RLR05C18R0GM 24 RLR05C24R0GM 30 RLR05C30R0GM 36 RLR05C36R0GM 43 RLR05C43R0GM 51 RLR05C51R0GM 62 RLR05C62R0GM 68 RLR05C68R0GM 82 RLR05C82R0GM 91 RLR05C91R0GM 110 RLR05C110...

Page 33: ...TM 11 5820 919 40 2 Figure 3 5 First Frequency Converter A1A1A1 Schematic 25 ...

Page 34: ...TM 11 5820 919 40 2 Figure 3 6 First Frequency Converter A A A Component Location Sheet 1 of 2 26 ...

Page 35: ... RF C7 Capacitor T6 Inductor R7 Resistor C12 Capacitor R14 Resistor CR3 Diode CR2 Diode Q3 Transistor T5 Transformer RF R19 Resistor C11 Capacitor C14 Capacitor R11 Resistor R12 Resistor R9 Resistor C16 Capacitor Q3 Transistor L8 Inductor R8 Resistor C20 Capacitor R10 Resistor R16 Resistor C9 Capacitor T7 Transformer T4 Transformer U2 Mixer RF C8 Capacitor U1 Amplifier RF T3 Inductor L9 Inductor R...

Page 36: ...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 Name Designation Quantity Radio Set Test Bed AN PRC 104 1 Signal Generator RF AN USM 323 1 Digital Multimeter AN USM 341 1 DVM ohmmeter function Spectrum Analyzer Hewlett Packard HP 141 T 1 High Resolution Hewlett Packard HP 8552B 1 IF Section ...

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 31 ...

Page 39: ...TM 11 5820 919 40 2 Figure 3 10 Second Frequency Converter A1A1A2 Component Location Sheet 1 of 2 32 ...

Page 40: ... U3 Mixer R19 Resistor C32 Capacitor R20 Resistor C31 Capacitor C20 Capacitor L6 Inductor L5 Inductor L8 Inductor R2 Resistor C33 Capacitor R1 Resistor C9 Capacitor R3 Resistor L1 Coil RF U1 Amplifier RF R29 Resistor C1 Capacitor CR1 Diode C22 Capacitor R11 Resistor U4 Mixer RF C6 Capacitor R18 Resistor C8 Capacitor R17 Resistor R10 Resistor C18 Capacitor R9 Resistor L2 Inductor T1 Transformer RF ...

Page 41: ...TM 11 5820 919 40 2 Figure 3 11 Second Frequency Converter A1A1A2 Performance Test 34 ...

Page 42: ...TM 11 5820 919 40 2 Figure 3 12 Third Frequency Converter A1A1A3 Schematic 35 ...

Page 43: ...TM 11 5820 919 40 2 Figure 3 13 Third Frequency Converter A1A1A3 Components Location Sheet 1 of 2 36 ...

Page 44: ... R4 Resistor C19 Capacitor C6 Capacitor L4 Inductor C9 Capacitor C18 Capacitor C15 Capacitor R12 Resistor C10 Capacitor R9 Resistor C11 Capacitor Q1 Transistor C12 Capacitor R8 Resistor C8 Capacitor C16 Capacitor U3 Microcircuit R13 Resistor C7 Capacitor R11 Resistor C5 Capacitor CR1 Diode L1 Coil RF C17 Capacitor U1 Microcircuit K2 Relay Electromagnetic R7 Resistor R5 Resistor C3 Capacitor C13 Ca...

Page 45: ...TM 11 5820 919 40 2 Figure 3 14 Third Frequency Converter A1A1A3 Performance test 38 ...

Page 46: ...IGNATION PREFIX WITH A1A2 2 CAPACITANCE VALUES ARE IN PICOFARADS 5 500V 3 INDUCTOR RESONANT FREQ ARE IN MEGAHERTZ MHz 4 ALL RELAYS EXCEPT FOR FL1 K ARE SHOWN DE ENERGIZED 5 INDICATES DEPENDENCY ON BENCH POWER SUPPLY VOLTAGE 6 VOLTAGES IN TRANSMIT MOOD WITH 50 OHM RADIO SET LOAD RF OUTPUT 20W 7 FOR SIGNAL INPUT OUTPUT ROUTING REFER TO FIGURE 2 1 39 ...

Page 47: ...tor CR2 Diode R2 Resistor Variable T1 Inductor R1 Resistor Variable R4 Resistor J2 Connector Coaxial RF C1 Capacitor CR1 Diode C2 Capacitor R3 Resistor C7 Capacitor C8 Capacitor J1 Connector Coaxial RF P1 Connector Receptacle Electric 2 Strap Handle FL1 Filter Submodule C9 Capacitor FL2 Filter Submodule FL6 Filter Submodule FL4 Filter Submodule FL5 Filter Submodule FL3 Filter Submodule 40 ...

Page 48: ...Hewlett Packard HP 8552B 1 IF Section RF Section Hewlett Packard 8553B 1 Tracking Generator Hewlett Packard HP 8443A 1 Power Supply DC Hewlett Packard HP 64398 1 Attenuator Coaxial Narda 765 20 1 20 db 30w man 50 ohm Figure 4 3 Harmonic Filter A1A2 Module Performance Test Setup CAUTION TO AVOID DAMAGE TO THE BENCH TEST CABLE RADIO PROTECTION CIRCUITS APPLY POWER AS FOLLOWS 1 CONNECT BENCH TEST CAB...

Page 49: ...db 20 db Bandwidth 100 kHz 300 KHz Center Frequency 2 5 MHz 50 MHz Scan width 0 2 MHz Per Division 05 KHz 0 100 MHz Inner Red Tracking Generator Function Track Analyzer Same RF Level O dbm Same Each filter can legitimately be checked by attaching the RF signal genera tor to A2J1 and the power meter to A2J2 the of signal generator is set to upper middle and lower points on the passband and the inse...

Page 50: ...TM 11 5820 919 40 2 Figure 4 4 Harmonic Filter A1A2 Performance Test Sheet 2 of 3 43 ...

Page 51: ...TM 11 5820 919 40 2 Figure 4 4 Harmonic Filter A1A2 Performance Test Sheet 3 of 3 44 ...

Page 52: ... Packard HP 8482A 1 Sensor Power Supply DC Hewlett Packard HP 6439B 1 Power Supply Current Hewlett Packard HP 6215A 1 Limited Attenuator Coaxial Narda 765 20 1 20 db 30w min 50 ohm Attenuator Step CN1128 U Figure 4 5 Harmonic Filter A1A2 Alignment Setup 45 NOTES 1 EQUIVALENT TEST EQUIPMENT MAY BE USED 2 USE ONLY TEST EQUIPMENT THAT IS PROPERLY CALIBRATED FAILURE TO DO SO MAY PROVIDE ERRONEOUS OR M...

Page 53: ...ricated rf control to obtain 20 watts output 2 coax cable in its place milliwatts indicated on the wattmeter from the harmonic filter module 3 Connect the test radio module cables and test equipment as shown in 3 Adjust R1 to obtain 14 5 0 1 vdc figure 4 5 Comply with notes 1 5 on at TP1 of the module with 20 watts module figure 4 5 output 4 Select the rf signal generator fre 4 Change the DVM moni...

Page 54: ...E 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 VALUES SHOWN WITH FREQUENCY KHz SET TO 16005 4 TEST POINT ACCEPTABLE RANGE 15 31VT087V Figure 5 1 Synthesizer A1A3 Schematic 47 ...

Page 55: ...TM 11 5820 919 40 2 Figure 5 2 Synthesizer A1A3 Component Location Sheet 1 of 2 48 ...

Page 56: ...onnector Coaxial RF C7 Capacitor C6 Capacitor C18 Capacitor C19 Capacitor C20 Capacitor C21 Capacitor C22 Capacitor C9 Capacitor C8 Capacitor FL1A Filter Bandpass AR3 Amplifier RF U1 Oscillator Crystal Temp FL1B Filter Bandpass C10 Capacitor C16 Capacitor U4 Microcircuit U2 Microcircuit Q2 Transistor B R11 Resistor R12 Resistor R6 Resistor R5 Resistor R7 Resistor R4 Resistor R8 Resistor R9 Resisto...

Page 57: ...er Power Meter Hewlett Packard HP 435A 1 Thermocouple Power Bewlett Packard BP 8482A 1 Sensor Spectrum Analyzer Bewlett Packard BP 141 T 1 High Resolution Bewlett Packard BP 8552B 1 IF Section RF Section Hewlett Packard BP 8558B 1 Tracking Generator Hewlett Packard HP 8443A 1 High Impedance Probe Hewlett Packard BP 1121A 1 Power Supply DC Hewlett Packard HP 6439B 1 Figure 5 3 Synthesizer A1A3 Perf...

Page 58: ...low adjust R19 of VCO U3 If unable to raise power continue with troubleshooting flowchart NOTE 4 Spurious signal applies between 60 and 110 MHz TP5 frequency is 70 090 000 Hz XY where X is 1 kHz frequency kHz digit and Y is 100 Hz frequency Hz digit Set spectrum analyzer as in Note 2 except that the center frequency is 91 MHz NOTE 5 When 1 kHz digit of frequency kHz is 0 TP15 voltage is 3v When th...

Page 59: ...TM 11 5820 919 40 2 Figure 5 4 Synthesizer A1A3 Performance Test Sheet 2 of 2 52 ...

Page 60: ...ch on control panel to USB 6 Set FREQUENCY KHZ switches on control panel to 29 990 0 1 Monitor TP15 filth DVM If required remove turns from T3 winding 1 2 red wire until DVM reads 3 1 0 4v 2 Adjust R21 so that A3J3 is at the frequency stenciled on TCXO U1 case 0 5 Hz 3 Disconnect rf extender cable from A3J2 Disconnect rf coax cable Connect the watt meter to A3J2 via rf coax cable 4 Adjust R4 of li...

Page 61: ...JAN1N4148 2 RESISTANCE VALUES ARE IN OHMS 5 1 2W 3 TRANSISTORS ARE JAN2N2222A 4 DS1 THROUGH DS6 ARE PART OF SWITCH ASSEMBLY S1 THROUGH S6 RESPECTIVELY 5 PARTIAL REF DESIGNATIONS ARE SHOWN FOR COMPLETE DESIGNATION PREFIX WITH A1A4 6 CAPACITANCE VALUES ARE IN MICROFARADS 10 7 VOLTAGES WITH FREQUENCY KHZ SET TO 02 500 0 54 ...

Page 62: ...TM 11 5820 919 40 2 Figure 6 1 Control Panel A1A4 Schematic Sheet 2 of 2 55 ...

Page 63: ... 6 places 17 Nut 18 Deleted 19 Gasket 20 Gasket 21 Gasket 22 Gasket 23 Switch Volume 24 Switch Mode 25 Switch Light 26 Switch Rotary SB 27 100 Hz 28 1 KHz 29 10 KHz 30 100 KHz 31 1 MHz 32 Switch Rotary 10 MHz 33 Connector Multipin A1A4J1 34 Allen Screw 12 places 35 Circuit Board Assembly Control Panel A1A4A1 36 Audio Filter Assembly A1A4A2 37 Connectors A1A4A2J1 A1A4A2J2 38 Connector Washer 2 plac...

Page 64: ... C7 Capacitor C5 Capacitor C8 Capacitor C6 Capacitor A1 2 Control Panel Circuit Card Assembly PWB Machined Board Q4 Transistor Mounting Pad Q5 Transistor Mounting Pad U2 Microcircuit CR4 Diode R5 Resistor R4 Resistor U1 Microcircuit CR5 Diode R6 Resistor R3 Resistor CR3 Diode R2 Resistor CR2 Diode CR1 Diode R1 Resistor Q2 Transistor Q1 Transistor Q3 Transistor Figure 6 2 Control Panel A1A4 Compone...

Page 65: ...Set Test Bed AN PRC 104 1 Digital Multimeter AN USM 341 1 DVM ohmmeter function Power Supply DC Hewlett Packard HP 6439B 1 CAUTION TO AVOID DAMAGE TO THE BENCH TEST CABLE RADIO PROTECTION CIRCUITS APPLY POWER AS FOLLOWS 1 CONNECT BENCH TEST CABLE TO RADIO 2 TURN ON POWER SUPPLY AND CHECK OUTPUT LEVEL 3 THEN CONNECT BENCH TEST CABLE TO POWER SUPPLY NOTES 1 EQUIVALENT TEST EQUIPMENT MAY BE USED 2 US...

Page 66: ... 4 Control Panel A1A4 Performance Test Sheet 1 of 4 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 59 ...

Page 67: ...TM 11 5820 919 40 2 Figure 6 4 Control Panel A1A4 Performance Test Sheet 2 of 4 60 ...

Page 68: ...TM 11 5820 919 40 2 Figure 6 4 Control Panel A1A4 Performance Test Sheet 3 of 4 61 ...

Page 69: ...TM 11 5820 919 40 2 Figure 6 4 Control Panel A1A4 Performance Test Sheet 4 of 4 62 ...

Page 70: ...TM 11 5820 919 40 2 Figure 7 1 Power Supply A1A5 Schematic 63 ...

Page 71: ...TM 11 5820 919 40 2 Figure 7 2 Power Supply A1A5 Component Location Sheet 1 of 2 64 ...

Page 72: ... Core EM E2 Core EM E8 Core EM E7 Core EM E6 Core EM Q1 Transistor R3 Resistor R23 Resistor R25 Resistor R24 Resistor Variable R9 Resistor R26 Resistor R7 Resistor 1 Strap Handle DISASSEMBLY NOTE Apply moderate heat to the five hex alien head cover plate screws to loosen loctite prior to loosening screws B R8 Resistor R12 Resistor R17 Resistor Variable R16 Resistor R18 Resistor R19 Resistor R13 Re...

Page 73: ...it MK 984 A None NOTE Referenced figures are in TM 11 5820 919 40 1 TEST EQUIPMENT Name Designation Quantity Radio Set Test Bed AR PRC 104 1 VTVM AN USM 116 1 Digital Multimeter AN USM 341 1 DVM ohmmeter function Dummy Load 50 ohm DA 553 4 1 Watt Meter Power Meter Hewlett Packard EP 435A 1 Thermocouple Power Sensor Hewlett Packard HP 8482A 1 Power Supply DC Hewlett Packard EP 6439B 1 Attenuator Co...

Page 74: ...rs 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 Figure 7 4 Power Supply A1A5 Performance Test Sheet 1 of 2 67 ...

Page 75: ...TM 11 5820 919 40 2 Figure 7 4 Power Supply A1A5 Performance Test Sheet 2 of 2 68 ...

Page 76: ...rom the receiver exciter 2 Plug the power supply unit to be aligned into the test bed radio 3 Except for the keying adapter sad watt meter connect the test radio cables adapters and test equipment as shown in figure 7 3 Set the do power supply 7 amp to 26 5v 4 Set the following test radio controls as follows a FREQUENCY KHz to 29 990 0 b SB to USB c ANT SEL to 50 OHM bypass d MODE to V TR e VOLUME...

Page 77: ...TM 11 5820 919 40 2 Figure 8 1 Amplifier Coupler A2 Schematic 71 ...

Page 78: ...TM 11 5820 919 40 2 Figure 8 2 Amplifier Coupler A2 Component Location Sheet 1 of 2 72 ...

Page 79: ...es 21 Latch 22 Screw Allen 2 places 23 Connector Cover 24 Antenna Cover 25 Antenna Mount upper 26 Knob Antenna Select 27 Packing Preform 28 Connector BNC A2J1 29 Packing Preform 30 Post Ground A2E3 31 Gasket 32 Switch Antenna Select A2S1 33 Antenna Mount Lower 34 Terminal Lug A2E4 35 Lockwasher 36 Nut 37 Connector Battery A2P1 ITEM DESCRIPTION 38 Screw 2 places 39 Capacitor 2 places 40 Gasket 41 G...

Page 80: ... 984 A None NOTE Referenced figures are in TM 11 5820 919 40 1 TEST EQUIPMENT Name Designation Quantity Radio Set Test Bed AN PRC 104 1 VTVM AN USM 116 1 Dummy Load 50 ohm DA 553 4 1 Attenuator Step CN 1128 U 1 10 db steps 0 5w 50 ohm Watt Meter Power Meter Hewlett Packard HP 435A 1 Thermocouple Power Hewlett Packard HP 8482A 1 Sensor Power Supply DC Hewlett Packard HP 6439B 1 Attenuator Coaxial N...

Page 81: ...TM 11 5820 919 40 2 Figure 8 4 Amplifier Coupler A2 Performance Test 75 ...

Page 82: ...TM 11 5820 919 40 2 Figure 9 1 Power Amplifier A2A1 Schematic Sheet 1 of 2 76 ...

Page 83: ...TM 11 5820 919 40 2 Figure 9 1 Power Amplifier A2A1 Schematic Sheet 2 of 2 77 ...

Page 84: ...TM 11 5820 919 40 2 Figure 9 2 Power Amplifier A2A1 Component Location Sheet 1 of 3 78 ...

Page 85: ...TM 11 5820 919 40 2 Figure 9 2 Power Amplifier A2A1 Component Location Sheet 2 of 3 79 ...

Page 86: ... Resistor R6 Resistor R7 Resistor R55 Resistor R8 Resistor R26 Resistor R76 Resistor R25 Resistor R34 Resistor R10 Resistor R29 Resistor R20 Resistor R39 Resistor R38 Resistor R35 Resistor R19 Resistor R41 Resistor R42 Resistor R43 Resistor R16 Resistor R14 Resistor R15 Resistor B13 Resistor R18 Resistor R17 Resistor R73 Resistor R74 Resistor R31 Resistor R40 Resistor R24 Resistor R37 Resistor R36...

Page 87: ... Signal Generator RF AN USM 323 1 Oscilloscope Hewlett Packard PP 1741A 1 Digital Multimeter AN USM 341 1 DVM ohmmeter function Attenuator Step CN 1128 U 1 10 db steps 0 5w 50 ohm Dummy Load 50 ohm DA 553 4 1 Watt Meter Power Meter Hewlett Packard HP 435A 1 Thermocouple Power Hewlett Packard HP 8482A 1 Sensor Spectrum Analyzer Hewlett Packard HP 141 T 1 High Resolution Hewlett Packard HP 8552B 1 I...

Page 88: ...TM 11 5820 919 40 2 Figure 9 4 Power Amplifier A2A1 Performance Test Sheet 1 of 3 82 ...

Page 89: ...TM 11 5820 919 40 2 Figure 9 4 Power Amplifier A2A1 Performance Test Sheet 2 of 3 83 ...

Page 90: ...TM 11 5820 919 40 2 Figure 9 4 Power Amplifier A2A1 Performance Test Sheet 3 of 3 84 ...

Page 91: ...10 db 3 Set ANT SEL to 50 ohm bypass VOLUME to on FREQUENCY KHZ to 29 999 1 SB to USB MODE TO V TR ADJUSTMENTS 1 Monitor TP 3 with DVM close PTT On bottom board adjust R24 for 30 5 0 5 vdc Open PTT 2 On the 18 pin extender cable remove the jumper lead between the two test points Insert a dc ammeter in place of the jumper and select a range of at least 100ma Ensure that positive lead is inserted in...

Page 92: ...TM 11 5820 919 40 2 Figure 10 1 Antenna Tuner A2A2 Schematic Sheet 1 of 2 86 ...

Page 93: ...TM 11 5820 919 40 2 Figure 10 1 Antenna Tuner A2A2 Schematic Sheet 2 of 2 87 ...

Page 94: ...TM 11 5820 919 40 2 Figure 10 2 Antenna Tuner A2A2 Component Location Sheet 1 of 3 88 ...

Page 95: ...TM 11 5820 919 40 2 Figure 10 2 Antenna Tuner A2A2 Component Location Sheet 2 of 3 89 ...

Page 96: ...tor Q6 Transistor Q5 Transistor Q15 Transistor C1 Capacitor Q16 Transistor R1 Resistor R2 Resistor ITEM DESCRIPTION R3 Resistor R4 Resistor R7 Resistor Q2 Transistor Q1 Transistor Q11 Transistor Q12 Transistor Q10 Transistor Q9 Transistor Q7 Transistor Q8 Transistor K1 Relay C2 Capacitor C4 Capacitor K4 Relay C5 Capacitor R7 Relay K5 Relay C6 Capacitor K6 Relay C20 Capacitor C13 Capacitor K8 Relay...

Page 97: ...esignation Quantity Radio Set Test Bed AN PRC 104 1 VTVM AN USM 116 1 Signal Generator RF AN USM 323 1 Oscilloscope Storage Hewlett Packard HP 1741A 1 Digital Multimeter AN USM 341 1 DVM ohmmeter function Attenuator Step CN 1128 U 1 10 db steps 0 5w 50 ohm Dummy Load 50 ohm DA 553 4 1 Watt Meter Power Meter Hewlett Packard HP 435A 1 Thermocouple Power Hewlett Packard HP 8482A 1 Sensor Power Supply...

Page 98: ...way 1 Monitor TP10 with DVM and record voltage measurement 2 Set TP10 to 0v this disables comparator by adjusting R4 3 Monitor bases of S and R driver transistors for RL1 thru E111 and came pare waveforms to those of a functional module see that the L count is performed properly 4 Set TP10 to 6v by adjusting R4 5 Monitor TP8 and TP9 with DVM and record voltage measurement 6 Set TP8 and TP9 to 0v t...

Page 99: ...TM 11 5820 919 40 2 Figure 10 4 Antenna Tuner A2A2 Performance Test Sheet 2 of 3 93 ...

Page 100: ...TM 11 5820 919 40 2 Figure 10 4 Antenna Tuner A2A2 Performance Test Sheet 3 of 3 94 ...

Page 101: ...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 Ratio Set Test Bed AN PRC 104 1 Signal Generator RF AN USM 323 1 Digital Multimeter AN USM 341 1 DVM ohmmeter function Power Supply DC Hewlett Packard HP 6439B 1 95 ...

Page 102: ...tch MODE to V RCV and back to V TR This generates a tune start pulse 2 Ground continuously E7 of ribbon cable 3 Increase level of rf signal generator until TP13 is 10v rms This corresponds to 2 watts in a 50 ohm system 4 Measure the dc output of the Z sensor at TP12 Record voltage at TP12 5 Adjust R4 until the Z comparator reference voltage TP10 is the same as that measured in step 4 6 Replace the...

Page 103: ...ntenance 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 TM 11 5820 919 24P General Support Maintenance Manual Radio Set AN PRC 104A TM 740 90 1 Administrative Storage of Equipment TM 750 244 2 Procedures for Destruction of Electronic Material to Prevent Enemy Use Electronics Comman...

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