(1991) tm 11-5820-i 048-110 operator's manual radio set an & prc-127

8/16/2019 (1991) TM 11-5820-I 048-110 Operator's Manual Radio Set AN & PRC-127

1/69


2/69

Distribution authorized to the Department of Defense and

DOD contractors only for official use or for administrative

or operational purposes. This determination was made on

1 January 1891. Other requests for this document will be

referred to Commander, US Army Communications-Electronics

Command and Fort Monmouth, ATTN: AMSEL-LC-LM-LT, Fort

Monmouth, NJ 0770345000.

DESTRUCTION NOTICE - Destroy by any method that will

prevent disclosure of contents or reconstruction of thedocument.


3/69

Batteries can explode if exposed to extreme heat. Donot store battery packs with other hazardous materials.Store in a cool [less than 130°F (54°C)], dry, well-ventilated area to prevent injury to personnel or damage to equipment.

Batteries contain corrosive material that can causeinjury to personnel. Do not crush, puncture, mutilate,or disassemble battery packs.

Do not dispose of alkaline batteries in fire. Do notrecharge batteries, put in backwards, or mix with usedor other battery types. Alkaline batteries may explode,leak, and cause injury to personnel or damage toequipment.

a / blank)


4/69


5/69

* T M 1 l - 5 8 2 0 - 1 0 4 8 - 1 0

TECHNICAL MANUAL Headquarters,Department of the Army

NO. 11-5820-1048-10 Washington, DC, 1 January 1991

Operator’s ManualRADIO SET AN/PRC-127

(NSN 5820-01-266-5964)

REPORTING ERRORS ANDRECOMMENDING IMPROVEMENTS

You can help improve this manual. If you findany mistakes or if you know of a way to improvethe procedures, please let us know. Mail your

letter or DA Form 2028 (Recommended Changesto Publ icat ions and B lank Forms) d i rec t toC o m m a n d e r , U S A r m y Communications-Elect ron ics Command and For t Monmouth,ATTN: AMSEL-LC-LM-LT, For t Monmouth, NewJersey 077034000. A reply will be furnished to

y o u .

*This manual supersedes TM 1 l -5820-1048-10,

dated 1 February 1990, which shall be destroyed in

accordance with applicable security regulations.


6/69

Page

HOW TO USE THIS MANUAL . . . . . . . . . vi

CHAPTER 1 INTRODUCTION

Section 1. General Information . . . . . . . . . . . . . . . . . . . 1-1

1 - 1 S c o p e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1l-2 Maintenance Forms,

Recor ds, and Repor ts . . . . . . . . . . . . 1 - 2

l -3 Report ing EquipmentImprovement Recom-mendations (El Rs) . . . . . . . . . . . . . . . . . 1 - 2

1-4 WarrantyInformat ion . . . . . . . . . . . . . . . . . . 1 - 3l-5 Nomenclature Cross-

Reference List . , . . . . . . . . . . . . . . . . . . . . . . 1-3

Section II.

Equipment Description . . . . . . l . . . . 1-4

1-6 Purpose and Use of RadioSet AN/PRC-127 . . . . . . . . . . . . . . . . . . . . 1 - 4

l-7 Location and Description

of Major Components . . . . . . . . . . . . 1 - 51-8 R/T Unit and Battery

Pack Data . . . . . . . . . . . . . . . . . . . . . . . . . l . . . . 1 7

l - 9 Battery Charger Data . . . . . . . . . . . . . . . . . 1-8


7/69


8/69

Page

Section III. Operation Under UsualConditions I . . . . . . . . . . . 2-13

2 5-

2-6

2-7

2-8

2-9

2-10

2-112-12

Assembly and Preparationfor Use . . . . . . . . . . . . . . . . . . . . . . . ..*......... 2-13

Battery Pack Installation/Removal . . . . ..*.........*................ 2-14

Alkaline Batteries

Installat ion/Removal . . . . . . . . . . . . . . 2-17Speaker/Microphone

Installation/Removal . . . . . . . . . . . . . . 2-2 1 Antenna Installation/

Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22

Door Cover Installation/

Removal . . . . . . . . . ..a..............*...... 2-23Normal Operation . . . . . . . . . . . . . . . . . . . . . . . 2-25Battery Charger Operation . . . . . . . . . 2-26

Section IV. Operation Under UnusualConditions . . . . ..*....................... 2-28

IV

2-13 Operation at LowTemperature . . . . . . . . . . . . . . . . . . . . . . . . . . 2-28

2-14 Operation at High

Temperatures . . . . . . . . . . . . . . . . . . . . . . . . 2-282-15 Operation in Tropical

Climates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-292-16 Operation During Jamming . . . . . . . . 2-29


9/69


10/69

HOW TO USE THIS MANUAL

This is a quick reference manual that has beenwritten just for you. Become familiar with its

contents so that you will be able to find what youneed quickly.

This manual will show you how to:

o OPERATE

o MAINTAIN

YOUR RADIO SET AN/PRC-127

It is small enough to fit in your pocket so you canalways have it ready for quick reference. After

you have had some time to use it, take a momentto let us know what you think about it.


11/69

CHAPTER 1INTRODUCTION

Section I.GENERAL INFORMATION

RADIO SET

AN/PRC-127

l-l : SCOPE

This manual tells the user how tooperate Radio Set AN/PRC-127.


12/69

1-2 MAINTENANCE FORMS, RECORDS, ANDR E P O R T S

a. Reports of Maintenance and Unsatisfactory

Equipment. Department of the Army forms andprocedures used for equipment maintenance will bethose prescribed by DA Pam 738-750, as contained inMaintenance Management Update.

b. Report of Item Packaging Discrepancies. Fill

out and forward SF 364 [Report of Discrepancy (ROD)]a s p r e s c r i b e d i n A R 735-11-2/DLAR 414O.55/SECNAVINST 4355.18/AFR 400-54/MC04430.3J.

c . Transportation Discrepancy Report (TDR) (SF 367). Fill out and forward Transportation DiscrepancyR e p o r t ( T D R ) ( S F 3 6 1 ) a s p r e s c r i b e d i n A R55-38/NAVSUPINST 4610.33C/AFR 75-1 8/MCOP4610.19D/DLAR 4500.15.

1-3 REPORTING EQUIPMENT IMPROVEMENTRECOMMENDATIONS (EIRs)

If your Radio Set AN/PRC-127 needs improvement,let us know. Send us an EIR. You, the user, are theonly one who can tell us what you don’t like about your equipment. Let us know why you don’t like the designor performance. Put it on an SF 368 (Product QualityDeficiency Report). Mail it to: Commander, US Army


13/69

Communicat ions-Elect ronics Command and FortMonmouth, ATTN: AMSEL-ED-WI, Fort Monmouth,

New Jersey, 07703-5000. We’ll send you a reply.

The Receiver /Transmi t ter R T - 1594/PRC-127 i swarranted by the K ing Radio Corporat ion for 24months from acceptance as evidenced by the signingof DD Form 250 by an author ized Governmentrepresentative of acceptance for the equipment or 12months after handoff to a field unit, whichever occursfirst. Report all defects in material or workmanship to

your superv isor , who wi l l take appropr ia te ac t ionthrough your unit maintenance shop.

1-5 NOMENCLATURE CROSS-REFERENCE

LIST

Common names will be used when following major components are mentioned in this manual.

Common Name Official Nomenclature

radio set Radio Set AN/PRC-127

R/T Receiver/Transmitter RT-1594/PRC-127

antenna Antenna AS-3960/PRC-127

13-


14/69

Section II.EQUIPMENT DESCRIPTION

1-6 PURPOSE AND USE OF RADIO SET

AN/PRC-127

T h e r a d i o s e t i s a h a n d - h e l d , 14-channelreceiver / t ransmit ter that prov ides two-way radiocommunicat ions in the 136 to 160 MHz f requencyrange. DC power is provided by a detachable battery

pack. The radio set consists of an R/T, an antenna,two rechargeable nickel-cadmium (Ni-Cd) bat terypacks and one nonrechargeable alkaline battery pack,a speaker/microphone, a speaker/microphone cover,door microphone, a speaker/microphone cover, door cover, an R/T holster, and a battery charger. These

major components are described in paragraph 1-7

1-4


15/69

1 - 7 LOCATION AND DESCRIPTION OFMAJOR COMPONENTS

\

The components shown make up

Radio Set AN/PRC-127.

ANTENNA

AS-3960/PRC-127

RECEIVER/TRANSMITTER

RT-1594/PRC-127

DOOR COVER

(PROTECTS DISPLAY

AND KEYPAD)

15m


16/69

i ii

a

cc?


17/69

l-8. R/T UNIT AND BATTERY PACK DATA

Frequency ................................. 136.000 to 160.00 MHz

Preset channels .......................................................... 14

Preset channel spacing ........................... programmable

Modulation ............................ frequency modulation (fm)

Range ......................................................... 3000 meters

Battery operating time Alkaline battery pack ...................................... 6 hours

Ni-Cd battery pack ......................................... 6 hoursPower output ............................................................ 2 w

Physical

Weight (including battery and

antenna, no handset) . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 lb (0.68 kg)Size R/T un it includ ing battery . . . . . . . . . . . . . . . . . 7.80 in .(198.1

mm) x 2.50 in. (63.5 mm) x1.52 in. (38.6 mm)

Environmental

Operating temperature

range . . . . . . . . . . . . . . . . . . . . . . . . . . ..*.................. -11°F to +111°F(-24°C to +44°C)

Watertightness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .not immersible

17-


18/69

Input voltage . . . . . . . . . . . . . . . . . .115

V ac/230 V ac (selectable)Input frequency . . . . . . . . . . . . . . . . . . . ............................ 50/60 HzInput power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15WCharge current

Slow Charge rateMinimum...............................................................60 mAMaximum . . . . . . . . . . . . . .................................... 140 mA

Fast charge rateminimum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l . . . . . . . 700 mAmaximum. . . . ............................................... 1100 mA

P h y s i c a l

Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.25 lb (1.47 kg)Size . . . . . . . . . . . . . . . . 6.75 in. (171.5 mm) x 3.25 in. (82.6 mm)

x 3.37 in. (85.6 mm)

E n v i r o n m e n t a l

Operating temperaturerange . . . . . . . . . . . . . . . . . . . . . +32°F to +140°F (O°C to +60°C)

Humidity . . . . . . . . . . . . . . . . . . . . . 0 to 90% at ambient temperatureof +95°F (+35°F)


19/69

Section III.TECHNICAL PRINCIPLES OF OPERATION

l-l 0. RECEIVER/TRANSMITTER RT-1594/PRC-

127

The R/T contains the circuitry to receive and transmitvoice signals over a distance of 3000 meters using anyone of up to 14 preset channels. Each of the 14

channels is preset to a specific frequency. A volume

control is provided to adjust the receive signal to acomfor tab le l is ten ing leve l . A squelch cont ro l isprov ided to inh ib i t no ise and unwanted rece iver signals. A push-to-talk control is provided to key thetransmitter. The control is pressed to talk and releasedto listen. A speaker/microphone is built into the R/T for use without an external speaker/microphone.

NOTE

The R/T preset operational channels

are programmed as a maintenance

function by unit maintenance support

personnel.


20/69

1 1 l ANTENNA AS-3960/PRC-127

he antenna is used to interface the received andansmitted signals with the R/T. This omnidirectional,exible antenna attaches to the R/T via a connector

nd can be detached for storage or shipment.

12. BATTERY PACK

he battery pack supplies dc operating power to theR/T. The battery pack attaches to the bottom of the

/T and is held in place by a spring clip and bracket onhe R/T and posts on the battery pack. The batteryack can be removed easily for replacement. Twoypes of battery packs are provided. One type is aechargeable Ni-Cd battery pack. The second typeontains nonrechargeable alkaline batteries. The Ni-

d battery pack may be recharged while either tached or detached to/from the R/T.

-10


21/69

The speaker/microphone clips securely to collar or lapel to provide communication without removing the

R/T from the operator’s belt. A built-in feature on thespeaker/microphone allows the operator to speakdirectly into the microphone attached to the lapel whilekeying the transmitter using the push-to-talk control onthe R/T attached to the belt. The speaker/microphoneis attached to the R/T via connectors.

The speaker/microphone cover is a nylon cover usedto protect the speaker/microphone from theenvironment.

1-l 5. R/T HOLSTER

The R/T holster is a nylon cover used to carry andprotect the R/T, with battery pack attached, from theenvironment. An opening in the holster flap allows theantenna to be attached while the R/T is in the holster.

Hardware is provided to attach the holster to theoperator’s belt.

l-11


22/69

-l 6. BATTERY CHARGER

The battery charger is used to charge the Ni-Cd batterypacks. The battery charger provided is a desk-typeharger that charges to 90% of full charge in 1 hour.

Once the charging function is complete, the unit willautomatically switch to a trickle rate to maintain theharge without overheating the battery pack. The rate

of charge in progress is indicated by lamps on theattery charger. A green lamp indicates the minimum

ate of charge or trickle rate. A red lamp indicates the

maximum rate of charge is in progress up to 90% fullharge. The battery charger operates on either 115 V

ac or 230 V ac source voltage. A switch on theunderside of the battery charger must be set to the

proper voltage before use. An adapter, suited toeographical location, is required for 230 V ac

peration.

-12


23/69

CHAPTER 2

OPERATING INSTRUCTIONS

Section 1.DESCRIPTION AND USE OF

OPERATOR’S CONTROLS AND INDICATORS

2-l l GENERAL

You should not attempt to operate the radio set untilyou fully understand the operation and function of thecontrols and indicators. The normal operatingprocedures are given in Section III of this Chapter.

2-2. CONTROLS AND- INDICATORS

The following keyed illustrations and text serve toprovide the operator with basic understanding of theradio set controls and indicators.

21-


24/69

NOTE: DOOR COVER REMOVED FOR ACCESS TO

DISPLAY AND KEYPAD

-2


25/69

Key

Control or

Indicator

CG-SQcontrol

OFF-VOLcontrol

Channelselectcontrol

Speaker/

microphone

Function

Provides CODE G U A R Doperation not available on the AN/PRC-127 and sets squelchthreshold level (cw) or off (full

ccw) .

Turns radio set on (cw) or off (full ccw). Adjusts level of sound heard from radio set or speaker/microphone.

Selects one of 14 presetoperating channels.

Functions as built-in speaker

(receive) and microphone(transmit) when externalspeaker/microphone is not

connected.

2 3.


26/69

NOTE: DOOR COVER REMOVED FOR ACCESS TODISPLAY AND KEYPAD

2-4


27/69

2-2. CONTROLS AND INDICATORS - CONT

Key

Control or

Indicator

Display

Keypad

Push-to-talkcontrol

Speaker/microphone

audioconnectors

Antennaconnector

Function

Five-digit liquid crystal display(LCD) used to indicateselected preset channel andmaintenance. For unitmaintenance only.

Sixteen-pushbutton keypad for unit maintenance level useonly .

Enables radio set to trans-mit when pressed.

Standard connectors for usewith external speaker/

microphone

Connects antenna to radioset.

2 5


28/69


29/69

Key

1 0

11

12

Control or

Indicator

LOWindicator

HIGHindicator

115/ 23OV

switch

Function

Green lamp lights to indicateslow charge (minimum rate).

Red lamp lights to indi-cate fast charge up to 90%charge (maximum rate).

Selects 115 or 230 V acoperation. For 230 V acoperation, depending on

geographical location, anadapter must be used.

2-7


30/69


31/69

o Interval Column - This column tells you when to do a

certain check or service.

o Items to be Inspected Column This column tellsyou what item to check or service.

o Procedure Column - This column tells you how toperform a service or check.

o Equipment Not Ready/Available If Column - Thiscolumn tells you when and why the equipment

cannot be used.

2-9-


32/69

OPERATOR PREVENTIVEMAINTENANCE CHECKS AND SERVICES (PMCS)

B-Before D-During

INTER-

VALITEMN O. B

0

0

D

ITEMTO BE

INSPECTED

Antenna

Operatingcontrols

PROCEDURES FOR READINESSCHECK FOR AND REPORTING

HAVE REPAIRED EQUIPMENTOR ADJUSTED NOT READY/

AS NECESSARY AVAILABLE IF:

Not broken, Broken, loose, or firmly secured. missing.

Not missing or loose, operatesmoothly withoutbinding.

Loose, missing, or binding.


33/69

OPERATOR PREVENTIVE

MAINTENANCE CHECKS AND SERVICES (PMCS) - CONT

B-Before D-During

INTER-VAL

ITEMN O .

3

4

B

0

D

0

ITEMTO BE

INSPECTED

Speaker/microphone

Basicoperation

PROCEDURES FOR READINESSCHECK FOR AND REPORTINGHAVE REPAIRED EQUIPMENT

OR ADJUSTED NOT READY/ AS NECESSARY AVAILABLE IF:

Not broken,firmly secured.

Unit on, set toassigned channel,communicatewith distantstation.

Broken, loose, or missing.

Distant station can-not hear you or youcannot hear distantstation. ’


34/69

B-Before D-During

ITEMN O .

OPERATOR PREVENTIVE

MAINTENANCE CHECKS AND SERVICES (PMCS) CONT

INTER-VAL

Ti

ITEMTO BE

B D INSPECTED

0 Batterypack

0 Batterycharger

PROCEDURESCHECK FOR ANDHAVE REPAIREDOR ADJUSTED

AS NECESSARY

Unit on, nottransmitting.

Unit on, notcharging.

FOR READINESSREPORTINGEQUIPMENTNOT READY/

AVAILABLE IF:

Will not receiveor transmit.

HIGH or LOWlamps not lighted.


35/69


36/69

2-6. BATTERY PACK INSTALLATION/REMOVAL

WARNING

Batter ies can explode i f exposed toextreme heat. Do not store battery packswith other hazardous materials. Store ina cool [less than 130°F (54°C)], dry, well-vent i la ted area to prevent in jury topersonnel or damage to equipment.

Batteries contain corrosive material thatcan cause injury to personnel. Do notcrush, puncture, mutilate, or disassemble

battery packs.

CAUTION

To prevent damage to R/T, only use batterypacks (item 1 or 2, Appx D) authorized for this equipment.

2-14


37/69

a. Installation

(1) Locate center hub on R/T base and place itin recess of battery pack.

(2) Position battery pack at 30 degrees, seatingtwo metal studs in their recesses.

(3) Apply upward pressure to battery pack whiletwisting battery pack clockwise to its original

position.

(4) Th e m et al t ab o n s i de o f R/T w i l l c l i c k,locking battery pack into position.

a

2-15


38/69

b. Removal

( 1) Ensure OFF-VOL control is set to OFF.

(2) Push metal tab on side of R/T upward while

twisting battery pack counterclockwiseapproximately 30 degrees.

(3) Remove battery pack from R/T

( 4) Check contacts on bottom of battery pack

for dirt or corrosion. Dirt may prevent agood electrical contact with the batterycharger.

NOTE

Rechargeable battery packs can be chargedseparately or while attached to the R/T.

2-16


39/69

2-7. ALKALINE BATTERIES INSTALLATION/REMOVAL

WARNING

Do not dispose of alkaline batteries in fire.Do not recharge batteries, put in backwards,or mix with used or other battery types.

Alkaline batteries may explode, leak, andcause injury to personnel or damage to

equipment.

a. Battery Pack Cover Removal

(1) While holding battery pack, press down ontwo metal studs to release battery tray.

(2) Remove battery pack cover.

2-17


40/69

b. Alkaline Batteries Installation

CAUTION

To prevent damage to equipment, alkalinebatteries must be installed in the samedirection for each side of the battery tray.

(1) Lay ribbon flat and install five alkalinebatteries in direction shown in battery tray.

(2) Turn battery tray over and repeat step (1)for five remaining batteries.

2-18


41/69

c. Alkaline Batteries Removal

(1) While holding battery tray flat, slowly pull onribbon and remove five batteries.

(2) Turn battery tray over and repeat step (1).

2-19


42/69

d . Battery Pack Cover lnstallation

NOTE

There is a long and a short shoulder on thebattery tray. The long shoulder aligns wi ththe long shoulder of the battery pack cover.

(1) Install battery pack cover over battery tray.

(2) Push down on battery pack cover until itlocks in place on battery tray.

LONG SHOULDER

LONG SHOULDER

2-20


43/69

2-8. SPEAKER/MICROPHONE INSTALLATION/REMOVAL

a. Install ati on

(1) Disengage cover from R/T speaker/microphone audio connectors.

( 2) Mate speaker/microphone cable connector to R/T speaker/microphone audio

connector.

(3) Secure speaker/microphone cableconnector to R/T with connector screw.

b. Removal

(1) Loosen cable connector screw.

(2) Separate speaker/microphone cableconnector from R/T.

(3) Secure cover on R/T speaker/microphoneaudio connectors.

2-21


44/69

a. Installation

(1) Mate antenna connector with antennaconnector on radio set.

(2) Rotate antenna connector clockwise untilsecure (hand tight).

b. Removal

(1) Grasp antenna where connectors mate.

(2) Rotate antenna connector counterclockwiseuntil connectors separate.


45/69

2 10 DOOR COVERINSTALLATION/REMOVAL

CAUTION

To prevent damage to door cover, avoidrough handling. When attempting to install,ensure edges of door cover are properlyaligned with mounting grooves. Do notforce door covers onto R/T.

a. Installation

1

2

3

4

Remove battery pack from R/T as describedin paragraph 2-6.

Locate mounting tab on door cover.

With mounting tab down, aline door cover

with mounting grooves on R/T and slidedoor cover upward until stopped bymounting tab against bottom edge of R/T.

Lift up gently on bottom edge of door cover and slide door cover upward until stoppedagainst top edge of display.

2-23


46/69

(5) Release door cover and gently press downand upward to sea t mount ing tab in todepression on R/T.

6 Removal

( 1) Remove battery pack from R/T as describedin paragraph 2-6.

( 2) On R/T, gently lift up on bottom edge of door cover to clear mounting tab.

(3) While continuing to l if t up on door cover,

s l ide door cover downward to c lear mounting grooves.

2-24


47/69

2 l

1 NORMAL OPERATION

a .

b .

c .

d .

e.

Turn power on by rotating OFF-VOL controlclockwise past OFF detent.

Select appropriate channel 1 thru 14 usingchannel select control.

Rotate CG-SQ control clockwise past CG detentuntil rushing noise is heard.

Adjust OFF-VOL control for comfortable level.

Rotate CG-SQ control counterclockwise untilrushing noise stops. This is called squelchthreshold setting.

NOTE

Warning beep will sound if transmitting on achannel that is not programmed with a validfrequency.

f . Press push-to-talk control and speak into built-inspeaker/microphone to transmit.

g . Release push-to-talk control to listen.

h. To turn off radio set, rotate OFF-VOL control

fully counterclockwise.

2-25


48/69

2 12 BATTERY CHARGER OPERATION

CAUTION

o

To prevent damage to battery charger, donot attempt to charge an alkaline batterypack. Only a Ni-Cd battery pack can berecharged.

o

To prevent damage to battery charger, donot connect battery charger to 230 V ac

with 1 lW23OV switch set to 115V.

For 230 V ac operation, depending ongeographical location, an adapter must be

used.

a. Set115W23OV

switch on bottom of batterycharger to applicable position.

b.

Connect battery charger to electrical outlet for

selected voltage.

2=26


49/69

c . Place R/T with attached battery pack or batterypack alone into battery charger cradle.

The battery charger is fully automatic andprovides the proper charge rate and chargerate indication.

d . Observe LOW and HIGH indicators on batterycharger. If battery pack charge is extremely low,

HIGH (red) indicator on battery charger will lightto indicate maximum charge rate in progress.

After battery pack reaches 90% charge, LOW(green) indicator on battery charger will light toindicate minimum rate of charge (trickle charge)in progress.

2-27


50/69

Section IV.OPERATION UNDER UNUSUAL CONDITIONS

2-13. OPERATION AT LOW TEMPERATURES

The radio set can operate to -11OF

-24OC . However,you must keep the operating controls and connectorsfree of ice. The same holds true for the antenna as iceon the antenna will reduce or distort the signal. Thebattery should be kept as warm as possible.

2 14

OPERATION ATHlGli

TEMPERATURES

This radio set can operate tol l

l° +44OC .

However; in hot, dry climates, the connectors ahdoperating controls are subject to damage from dustand d i r t . When not in use, keep the connectorscovered wi th the p lug cover . Keep the opera t ingcont ro ls as dust - f ree and d i r t - f ree as poss ib le .Constant exposure to the sun could cause damage, sotry to keep the equipment out of the sun as much aspossible.


51/69

2 15 OPERATION IN TROPICAL CLIMATES

In warm, damp climates, the equipment is subject todamage from moisture and fungi. Wipe all moisture

and fungi from the equipment with a dry, lint-free cloth.

2 l 6. OPERATION DURING JAMMING

A common jamming procedure is the transmission of astrong or annoying signal on your operating channel,

making it difficult or impossible for you to maintaincommunications. Sometimes this signal may be from afriendly station. It is also possible that the unusualnoise or interference may be due to a bad radio set.To check it out, do the following:

a. Disconnect the antenna in accordance withparagraph 2-9.

Do not key transmitter with antennaconnector shorted out to prevent damage to

equipment.

b. Short out the antenna connector with availablematerial.

2-29


52/69

c. If you still have noise or interferences, you havea bad radio set. If the noise or interferencegoes away, you are being jammed. Report

j amming as soon as poss ib le to o f f i cer in

c h a r g e . O n e o r m o r e o f t h e f o l l o w i n gant i jamming procedures may al low you tocontinue operating the radio set.

1

2

3

4

Try to use a nearby obstruction as a screen.Position yourself so that the obstruction acts

as a screen between the radio and thepossible source of interference.

Po in t your rad io in the d i rec t ion o f thedistant station you are communicating with.Try several positions.

Change the setting of the VOL control. Thismay raise the level of the desired signalenough to be heard over the jammingsignal.

If none of the above works, get permission

to change to another channel.

2-30


53/69

CHAPTER 3

MAINTENANCE INSTRUCTIONS

Section I.

LUBRICATION INSTRUCTIONS

The radio set does not require any lubrication.

Section II.TROUBLESHOOTING PROCEDURES

Other than replacing a suspected defective batterypack (paragraph 2-6) or replacing alkaline batteries(paragraph 2-7), no operator troubleshooting isauthorized for the radio set. Any trouble detected byyou is to be reported to unit maintenance personnel.

Section Ill.MAINTENANCE PROCEDURES

Operator maintenance of the radio set and batterycharger is limited to keeping it as clean as possible at

all times. Use clean, lint-free cloth (item 3, Appx D) todo this.

3-l/ 3-2 blank)


54/69


55/69


56/69

Procedure for Destruction of Elec-tronics Materiel to

Prevent

Enemy Use (Electronics Command) . . . . . . TM 750-244-2Unit, Direct and General

Support Maintenance Manual

(Including Repair Parts and

Special Tools List). . . . . . . . . . . . . . . . . . . TM 1 1-5820-l 048-24 P

A-4. MISCELLANEOUS

Consolidated Index of ArmyPublications and Blank Forms . . . . . . . . . . . . . . . . DA Pam2530

The Army Maintenance Manage-

ment Sy s t em (TAMMS) . . . . . . . . . . . . . . . . . . . . . . . DA Pam 738-750Warranty Program for

Radio Set AN/PRC-1267

Receiver/Transmitter

RT-1594/PRC-127 . . . . . . . . . . . . . . . . . . . . . .TB 11-5820-l 48 X

A 2


57/69

APPENDIX B

COMPONENTS OF END ITEM

AND BASIC ISSUE ITEMS LIST

Section I.I N T R O D U C T I O N

B-l l SCOPE

This appendix lists components of end item and basic

issue items for the radio set to help you inventory itemsrequired for safe and efficient operation.

B-2. GENERAL

The Components of End Item and Basic issue ItemsLists are divided into the following sections:

a. Section l Components of End Item. This listingis for informational purposes only, and is not authorityto requisition replacements. These items are part of

the end i tem, but are removed and separatelypackaged for transportation or shipment. As part of theend i tem, these i tems must be wi th the end i temwhenever it is issued or transferred between propertyaccounts. Illustrations are furnished to assist you inidentifying the items.

.


58/69

b. Section 111 Basic Issue Items. These are theminimum essential items required to place the radio set

in operation, to operate it, and to perform emergencyrepairs.

B-3. EXPLANATION OF COLUMNS

The following provides an explanation of columnsfound in the tabular listings:

a. Column I Illustration Number Illus No.). Thiscolumn indicates the reference number of the item asshown on the illustration.

6 Column 2 National Stock Number. Indicatesthe National stock number assigned to the item and willbe used for requisitioning purposes.

c . Column (3) Description. Indicates the Nationalitem name and, if required, a minimum description toidentify and locate the item. The last line for each itemindicates the CAGE (in parentheses) followed by thepart number.


59/69

d . Column (4) Unit of Measure (U/M). Indicatesthe measure used in performing the actualoperation/maintenance function. This measure isexpressed by a two-character alphabetical

abbreviation; e.g., ea, in., pr.

e. Column (5) Quantity Required Qty Reqd).Indicates the quantity of the item authorized to be usedwith/on the equipment.

B-3


60/69


61/69

1

ILLUS

N O.

(2) NATIONALSTOCK

NUMBER

5985-01-274-5051

6130-01-274-0839

6135-01-274-5015

(3) DESCRIPTIONCAGE AND PART

NUMBER

Antenna AS-3960/PRC-127(80058) 071-l 299-30

Battery Charger (22373) 062-0103-05

Battery Pack,Alkaline(22373) 071-0056-02

4

fl l

EA

EA

EA

5

QTY

REQD


62/69

Section II. COMPONENTS OF END ITEM CONT

1

ILLUS

N O .

4

5

(2) NATIONAL (3) DESCRIPTION

STOCK CAGE AND PART

NUMBER NUMBER

6140-01-274-0835

81 5 1 276 481

5820-01-274-5063

Battery Pack, Ni-Cd(22373) 200-3224-07

R/T Holster

(22373) 071-0059-00

Receiverflransmitter

RT 1594fPRC 127

(80058) 062-0118-00

4

U / M

E A

E A

E A

5

Q-w

REQD


63/69

Section II. COMPONENTS OF END ITEM CONT

1

(2) NATIONAL (3) DESCRIPTION 5

ILLUS S T O C K CAGE AND PART 4

Q T Y

N O . NUMBER NUMBER U/M REQD

6 5965-01-274-5016 Speaker/Microphone E A 1

(22373) 071-3012-I 0

7 5965-01-292-8307 Speaker/Microphone E A 1

C o v e r


64/69

SectCon

III

BASIC ISSUE ITEMS

1)

(2) NATIONAL (3) DESCRIPTION 5

ILLUS

STOCK CAGE AND PART 4

QTY

N O.

NUMBER NUMBER U / M REQD

NA 5826-01-2166-5966 Technical Manual E A 1

TM 11-5820-l 048-l 0. .


65/69

APPENDIX D

EXPENDABLE/DURABLE SUPPLIES

AND MATERIALS LIST

Section I.INTRODUCTION

D-l l SCOPE

This appendix lists expendable supplies and materialsyou will need to operate and maintain the radio set.These items are authorized to you by CTA-50-970,Expendable Items (Except Medical, Class V, Repair Parts, and Heraldic Items).

D-2. EXPLANATION OF COLUMNS

a. Column (7) /tern Number. This number isassigned to the entry in the listing and is referenced inthe narrative instructions to identify the material; e.g.,“Use lint-free cloth, item 3, Appx ”

b . Column (2) Level. This column identifies the

lowest level of maintenance that requires the listeditem.

C Operator/Crew

0 Unit Maintenance

D-l


66/69

c . Column (3) National Stock Number. This is theNational stock number assigned to the item; use it torequest or requisition the item.

d. Column 4) Description. Indicates the Federalitem name and, if required, a description to identify thei tem. The last l ine for each i tem indicates theCommercial and Government Entity (CAGE) code inparentheses followed by the part number.

e. Column (5) Unit of Measure (U/M). Indicatesmeasure used in performing the actual maintenancefunct ion. This measure is expressed by a two-character alphabetical abbreviation; e.g., ea, in., pr. If the unit of measure differs from the unit of issue,requisition the lowest unit of issue that will satify your requirements.

D 2


67/69

ITEM

NUMBER

1

2

3

2LEVEL

0

0

0

3

NATIONAL

S T O C K

NUMBER

6135-01-274-5015

6140-01-274-0835

7920-00-965-4960

4 5DESCRIPTION U/M

Battery Pack, Alkaline

(22373) 071-0056-02

Battery Pack, Ni-Cd

(22373) 200-3224-07

Cloth, Lint-Free(81348) CCC-C-444

E A

E A

Y D


68/69


69/69

By Order of the Secretary of the Army:

CARL E. VUONOGeneral, United States Army

Chief o f St a f f

Official:

PATRICIA P. HICKERSON

olonel United States Army

The Adjutant General

DISTRIBUTION:

To be distributed in accordance with DA Form12 36 E block 8803, Operator Maintenance

requirements for TM 1 l-5820-1048-10.

U. S. Gavernment

Pr i nt i ng Of f i ce: 1991512 085 40107

(1991) tm 11-5820-i 048-110 operator's manual radio set an & prc-127

Documents