AN-PRC-104A_serv_TM11-5820-919-40-1_1986.pdf

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1、T M 1 1 - 5 8 2 0 - 9 1 9 - 4 0 - 1 TECHNICAL MANUAL GENERAL SUPPORT MAINTENANCE MANUAL RADIO SET AN/PRC-104(A) (NSN 5820-01-141-7953) HEADQUARTERS, DEPARTMENT OF THE ARMY 15 JANUARY 1986 TM 11-5820-919-40-1 SAFETY IS THE STEPS VICTIM TO FOLLOW IF OF ELECTRICAL SOMEONE SHOCK DO NOT TRY TO PULL OR GR

2、AB 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 WOODEN POLE OR A ROPE OR SOME OTHER INSULATING MATERIAL SEND FOR HELP AS SOON AS POSSIBLE AFTER THE INJURED PERSON IS FREE OF CONTACT WITH THE S

3、OURCE OF ELECTRICAL SHOCK, MOVE THE PERSON A SHORT DISTANCE AWAY AND IMMEDIATELY START ARTIFICIAL RESUSCITATION A TM 11-5820-919-40-1 WARNING HIGH VOLTAGE is used in the operation of this equipment DEATH ON CONTACT may result if personnel faiI to observe safety precautions Never work on electronic e

4、quipment 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.When the technician is aided by operators, he must warn them about dangerous areas. Whenever possible, the power supply to the equipment must

5、 be 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 installi

6、ng or operating this equipment. connections or 115 volt ac input connections when Whenever the nature of the operation permits, keep one hand away from the equipment to reduce the hazard of current flowing through the body. Warning:Do not be misled by the term “low voltage.”Potentials as low as 50 v

7、olts may cause death under adverse conditions. For Artificial Respiration, refer to FM 21-11. B TM 11-5820-919-40-1 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 recomm

8、ended precautions that personnel must understand and apply during many phasesof operation and maintenance. KEEP AWAY FROM LIVE CIRCUITS Operating personnel must at all times observe all safety regulations. Unless specifically directed in this manual, do not replace components or make adjustments ins

9、ide the equipment with any power supply turned on. Under certain conditions, dangerous potentials may exist in the power supplies when the power control is in the off position. To avoid casualties, always remove power and discharge and ground a circuit before touching it. DO NOT SERVICE OR ADJUST AL

10、ONE Under no circumstances should any person reach into or enter the enclosure 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,

11、 particularly in the technique of mouth to mouth resuscitation and closed chest heart massage (FM 21-11). Thefollowing warnings appear in this A 3-wire (line, neutral, and safety volume, and are repeated here for emphasis. W A R N I N G ground) AC line power connections is required when operating th

12、e equipment. If a 3-wire safety grounded AC power receptacle is not available, a separate ground wire must be installed from the chassis ground to an earth ground. Without an adequate ground, the equipment chassis and frame will float to a dangerously high potential. W A R N I N G Lethal voltage is

13、used in the operational checkout of this unit. Death on contact may result if personnel fail to observe the following safety precautions. Remove watches and rings and exercise extreme caution when working inside the equipment throughout the remainder of this procedure. C TM 11-5820-919-40-1 W A R N

14、I N G Prior to performing the folowing 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. W A R N I N G Lifting heavy equipment

15、 incorrectly can cause serious injury. Do not try to lift more than 35 pounds by yourself. Get a helper. Bend legs while lifting. Dont support heavy weight with your back. W A R N I N G Adequate ventilation should be provided while using TRICHLOROTRIFLUOROETHANE. Prolonged breathing of vapor should

16、be avoided. The solvent should not be used near heat or open flame,the productsof decompositionare toxic and irritating.Since TRICHLOROTRIFLUOROETHANE dissolves natural oils, prolonged contact with skin should be avoided. When necessary use gloves which the solvent cannot penetrate. If the solvent i

17、s taken internally, consult a physician. Compressed air shall not be used for cleaning purposes except where reduced to less than 29 psi and then only with effective chip guarding and personnel protective equipment. Do not use compressed air to dry parts when TRICHLOROTRIFLUOROETHANE has been used.

18、Compressed air is dangerous and can cause serious bodily harm if protective means or methods are not observed to prevent chip or particle (of whatever size) from being blown into the eyes or un- broken skin of the operator or other personnel. D TM 11-5820-919-40-1 SAFETY SUMMARY The following warnin

19、gs and cautions appear within the text or illustrations of this manual .The warnings or cautions include a paragraph, figure, or table reference to where they appear in text or illustrations. WARNING Vapors emitted during certain circuit card repair procedures may be irri- tating to personnel.Always

20、 perform circuit card repair procedures in a well ventilated area. (3-17) WARNING Isopropyl alcohol is flammable.Keep away from heat and open flame. Vapors may be harmful.Use with adequate ventilation.Avoid prolonged or repeated breathing of vapor.Avoid eye contact.Do not take internally. (3-22, 3-2

21、3, 3-39) WARNING Adhesives are irritating to the skin and eyes upon contact, and may emit harmful vapor.Use only with adequate ventilation or respirator as speci- fied by the Bioenvironmental Engineer.Avoid all skin and eye contact. Use protective clothing such as rubber gloves, apron and eye protec

22、tion. Wash off immediately any accidentally contaminated skin area. Hand washing facilities and eye wash fountain should be provided.Do not take inter- nally. (3-22, 3-24, 3-35, 3-36, 3-37, 3-38) WARNING Handling hot items presents a serious injury potential.Asbestos gloves are required. (3-22,3-24,

23、 3-33, 3-34, 3-35, 3-36, 3-38) WARNING Polyurethane contains flammable solvents and toxic diisocyanates.Keep away from heat and open flame.Vapors or mists are harmful.Complete body protection,including entire head,is required to prevent skin or eye irri- tation from contact with the paint or its vap

24、ors or mists.Respirator pro- tection is required,usually an air-supplied hood, during mixing, curing, and application.Use this paint only with the protection requirements specified by the Bioenvironmental Engineer.Suitable flushing facilities must be provided for immediate clean water flushing of an

25、y accidental skin or eye contact. Do not take internally. (3-22) E TM 11-5820-919-40-1 SAFETY SUMMARY (Continued) WARNING Drilling operations create metal chips which may enter the eyes and cause serious injury. Eye protection is required. (3-23) WARNING Toluene is flammable. Keep away from heat and

26、 open flame. Vapors are harmful. Use only with adequate ventilation or respirator as specified by the Bioenvironmental Engineer.Avoid prolonged or repeated breathing of vapor.Avoid contact with skin and eyes.Do not take internally.Comply with air pollution control rules concerning photochemically re

27、active solvents. (3-24) CAUTION Never apply excessive pressure against a circuit card. (3-25) WARNING Solvents used in this procedure are flammable and must be kept from open flame, heat, and sparks.Keep containers tightly closed and store them a cool place when not being used.The solvent must be us

28、ed only in an adequately ventilated environment.Avoid breathing vapors and repeated contact with skin.Clean hands thoroughly before smoking, eating, or drinking. (3-33) in WARNING Use Freon with good ventilation.Avoid prolonged or repeated breathing of vapor.Avoid contact with skin and eyes. Do not

29、take internally. (3-35, 3-37, 3-38) CAUTION The areas to be soldered must be heated until the solder flows.Over- heating can damage the board or nearby components. The wires being sol- dered must not be allowed to move in relation to one another until the solder has completely solidified.(3-36, 3-37

30、) CAUTION Do not cut down into the circuit card pad when trimming the wire. (3-39) F TM 11-5820-919-40-1 SAFETY SUMMARY (Continued) WARNING When using a compressed airjet, use eyeshields.(3-43) WARNING When using solvents, provide proper ventilation, avoid prolonged contact, and do not smoke.Solvent

31、s must meet all pertinent specifications regarding toxicity, flammability, and allergenic effects.(3-43) CAUTION Compressed air must be clean,dry, and at a maximum pressure of 28 psi. Do not overlook the force of the airjet when cleaning delicate parts.(3-43) CAUTION Certain solvents will damage ins

32、ulation.Do not use solvents chemically similar to“Chlorothene” orGlyptal”to clean module connectors.Use only denatured alcohol for this purpose. (3-43) CAUTION When removing modules (except for power supply), pull straight up.Do not rock. (5-6) CAUTION Improper removal of power supply may cause dama

33、ge to multipin connector. (5-10) CAUTION Do not place control panel so that it will fall out when captive screws are loosened.Flexible cable to housing could be damaged.(5-11) CAUTION When control panel is disattached from radio, care should be taken to prevent static discharge.(5-11) G TM 11-5820-9

34、19-40-1 SAFETY SUMMARY (Continued) Use extreme care when removing or severe bending will damage ribbon 6-22) CAUTION replacing ribbon cables.Creasing or cables internally. (5-12, 5-15, 6-9, CAUTION Use only moderate force to tighten screws etc. (5-16) CAUTION that hold down modules, covers, When rep

35、lacing modules do not pinch rf cables between housing and module. (5-18) CAUTION Insertion of miniature coax connectors must forcing. (5-18) be made carefully without CAUTION To avoid damage to the bench test cable radio protection circuits, apply power as follows: 1. Connect bench test cable to rad

36、io. 2.Turn on power supply and check output level. 3.Then connect bench test cable to power supply.(F6-3) H Technical Manual No. 11-5820-919-40-1 TM 11-5820-919-40-1 HEADQUARTERS DEPARTMENT OF THE ARMY Washington, DC, 15 January 1986 GENERAL SUPPORT MAINTENANCE MANUAL RADIO SET AN/PRC-104A (NSN 5820

37、-01-141-7953) REPORTING 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 locat

38、ed in the back of this manual direct to:Commander, US Army Communications-Electronics Command and Fort Monmouth, ATTN: AMSEL- ME-MP, Fort Monmouth, NJ 07703-5007. A reply will be furnished to you. Section WARNINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

39、. . . . . . . . . . . . . . . . . . .A through H TABLE OF CONTENTS Page 0GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0-1 0-1Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

40、 . . . . . . . . . . . . . . . . . . . . . .0-1 0-2Consolidated Index of Army Publications and Blank Forms . . . . . . . . . . . . . . . . . . . . . 0-1 0-3Maintenance Forms, Records and Reports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0-1 0-4Reporting Equipment Improve

41、ment Recommendations. . . . . . . . . . . . . . . . . . . . . . . . 0-1 0-5Adminstrative Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0-1 0-6Destruction of Army Electronics Materiel . . . . . . . . . . . . . . . . . . . . . . . . .

42、. . . . . . . . . . .0-1 i TM 11-5820-919-40-1 TABLE OF CONTENTS Section Page LIST OF ILLUSTRATIONS. . . . . . . . . . . . . . . . . . . . . . . . . ix LIST OF TABLES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . x CHAPTER 1.GENERAL INFORMATION 1-1Scope of Technical Manual . . . . 1-8

43、Reference Data . . . . . . . . . . 1-10 Technical Characteristics . 1-11 Equipment Supplied . . . . . 1-12 Equipment Not Supplied . . . 1-13 Support Equipment . . . . . 1-15 Special Maintenance Facility 1-16 List of Publications . . . . Requirements . . . . . . . 1-1 1-2 1-2 1-2 1-2 1-2 1-2 1-2 CHAP

44、TER 2.THEORY OF OPERATION 2-1Introduction. . . . . . . . . . . . . . . . . . . . . . . . . 2-1 I SYSTEM FUNCTIONAL DESCRIPTION . . . . . . . . . . . . . . . . . . . 2-1 2-3General . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 2-5Transmit Operation. . . . . . . . . . . . . . . . . . . . .

45、 . 2-1 2-13 Receive Operation . . . . . . . . . . . . . . . . . . . . . . 2-2 2-15 Automatic Impedance Matching . . . . . . . . . . . . . . . . . 2-2 II OVERALL FUNCTIONAL DESCRIPTION . . . . . . . . . . . . . . . . . . . 2-7 2-18 General . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19 Ra

46、dio Set . . . . . . . . . . . . . . . . . . . . . . . 2-20 Receiver/Exciter. . . . . . . . . . . . . . . . . . . . . . . 2-21 Control Panel . . . . . . . . . . . . . . . . . . . . . 2-22 Frequency Selection . . . . . . . . . . . . . . . 2-23 Mode Selection. . . . . . . . . . . . . . . . . . 2-24 Sid

47、eband Selection . . . . . . . . . . . . . . . . 2-25 Volume Control. . . . . . . . . . . . . . . . . . 2-26 Synthesizer . . . . . . . . . . . . . . . . . . . . . . 2-27 Modulator/Demodulator . . . . . . . . . . . . . . . . . 2-28 Harmonic Filter . . . . . . . . . . . . . . . . . . . . 2-29 Power Sup

48、ply. . . . . . . . . . . . . . . . . . . . . . 2-30 Amplifier/Coupler . . . . . . . . . . . . . . . . . . . . . . 2-31 Power Amplifier . . . . . . . . . . . . . . . . . . . . 2-32 Antenna Tuner . . . . . . . . . . . . . . . . . . . . . 2-33 Battery Pack. . . . . . . . . . . . . . . . . . . . . . . .

49、 . 2-34 Description . . . . . . . . . . . . . . . . . . . . . . 2-7 2-7 2-7 2-7 2-7 2-7 2-7 2-7 2-7 2-7 2-8 2-8 2-8 2-8 2-8 2 - 8 2 - 8 ii TM 11-5820-919-40-1 TABLE OF CONTENTS (Continued) Section 2-35 Power Distribution System . . . . . . . . . . . . . . . . . . 2-36 Description . . . . . . . . . . . . . . . . . . . . . . IIIDETAILED FUNCTIONAL DESCRIPTION . . . . . . . . . . . . . . . . . . 2-40 Receiver/Exciter. . . . . . . . . . . . . . . . . . . . . . . 2-41 Control Panel . . . . . . . . . . . . . . . . . . . . . 2-42 General . . . . . . . . . . . . . . . . . . . . .