TM 11-5820-1048-24 TECHNICAL MANUAL UNIT, DIRECT …

1 TM 11-5820-1048-24 TECHNICAL MANUALUNIT, DIRECT support ANDGENERAL support maintenance MANUAL ( including repair PARTSAND SPECIAL TOOLS LIST)UNIT PREVENTIVE MAINTENANCECHECKS AND SERVICES (PMCS)2-27 UNITTROUBLESHOOTING2-29 UNITTROUBLESHOOTING2-29 UNIT MAINTENANCEINSTRUCTIONS2-37 general SUPPORTMAINTENANCEINSTRUCTIONS4-1 ALPHABETICALINDEXI ndex-1 radio SET AN/PRC-127(NSN 5820-01-266-5964)HEADQUARTERS, DEPARTMENT OF THE ARMY15 APRIL 1990TM 11-5820-1048-24 &PSAFETY STEPS TO FOLLOW IF SOMEONE IS THE VICTIM OF ELECTRICALSHOCKDO NOT TRY TO PULL OR GRAB THE INDIVIDUALIF POSSIBLE, TURN OFF THE ELECTRICAL POWERIF YOU CANNOT TURN OFF THE ELECTRICAL POWER, PULL, PUSH, OR LIFTTHE PERSON TO SAFETY USING A DRY WOODEN POLE OR A DRY ROPE ORSOME OTHER INSULATING MATERIALSEND FOR HELP AS SOON AS POSSIBLEAFTER THE INJURED PERSON IS FREE OF CONTACT WITH THE SOURCE OFELECTRICAL SHOCK, MOVE THE PERSON A SHORT DISTANCE AWAY ANDIMMEDIATELY START ARTIFICIAL RESUSCITATION512345aTM 11-5820-1048-24 &PFor artificial respiration.

2 Refer to FM and nickel-cadmium (Ni-Cd) batteries can explodecausing injury to personnel and/or damage to NOT puncture, mutilate, crush, or heat batteries. DONOT USE batteries which are damaged, swollen, or NOT TOUCH hot battery compartment. If you hear ahissing sound, immediately turn off equipment and placeequipment in a well-ventilated area or leave the 11-5820-1048-24 &PTechnical ManualHEADQUARTERSDEPARTMENT OF THEARMYNo. 11-5820-1048-24 &PWashington, DC, 15 April 1990 Unit, DIRECT support andGeneral support maintenance MANUAL ( including repair Parts and Special Tools List) radio SET AN/PRC-1271(NSN 5820-01-266-5964)REPORTING ERRORS AND RECOMMENDING IMPROVEMENTSYou can help improve this MANUAL .

3 If you find any mistakes or if you know of a way to improve the procedures,please let us know. Mail your letter, DA Form2028 (Recommended Changes to Publications and Blank Forms),or DA Form 2028-2 located in back of this MANUAL DIRECT to: Commander, US Army Communications-ElectronicsCommand and Fort Monmouth, ATTN: AMSEL-LC-ME-PS, Fort Monmouth, New Jersey 07703-5000. A replywill be furnished DIRECT to OF CONTENTSPageHOW TO USE THIS IGeneral Description and of 2 UNIT maintenance Parts; Special Tools; Test, Measurement,and Diagnostic equipment (TMDE); and Upon Preventive maintenance Checksand Services (PMCS)..2-27 IVUnit Trouble maintenance for Storage and 11-5820-1048-24 &PTABLE OF CONTENTS - ContinuedIllus/Page FigureCHAPTER 3 DIRECT SUPPORTMAINTENANCE INSTRUCTIONS (Not applicable)

4 CHAPTER 4 general SUPPORTMAINTENANCE A B maintenance ALLOCATION C repair PARTS AND SPECIAL TOOLS I repair Parts radio Set C-101 Receiver/Transmitter RT-1594 C-202 Battery C-3 SectionIII Special Tools ListGroup20 Special C-4 SectionIV Cross-Reference IndexesNational Stock Number Number and Item Number D EXPENDABLE/DURABLE SUPPLIES ANDMATERIALS E ILLUSTRATED LIST OF 11-5820-1048-24 &PHOW TO USE THIS MANUALEach chapter begins with an index that lists each paragraph or section in the chapter.

5 Each section in the maintenancechapter also has an index that lists the procedures in the section and gives page numbers. Or you can look for theinformation you want in the alphabetical subject index at the back of the got rid of as many words as we could and put in lots of illustrations to show just about everything you'll be doing tomaintain your text is keyed to the illustrations with callout numbers (sometimes words). The callout numbers are in parentheses inthe HOW DO YOU USE THIS MANUAL ?Like the volume level is low on the radio setand you want to troubleshoot the at the cover and you'll see index boxes nearthe right- hand edge with subject titles in 'll find "UNIT TROUBLESHOOTING 2-29.

6 "You can skip over to page the pages a bit and look at the edges. You'llsee black bars ..n some of the pages that arelined up with the index boxes on the 11-5820-1048-24 &P4. If you put your thumbnail on the black bar that is lined up with the box on the cover for UNITTROUBLESHOOTING and open the MANUAL , you'll be on page On page 2-29, you'll find Section IV, UNIT TROUBLESHOOTING. Look through thetroubleshooting table until you find the malfunction VOLUME LEVEL IS LOW. ivTM 11-5820-1048-24 &P6. As you do the tests and corrective actions in the order listed, you will get to "Replace battery pack with aknown good battery pack.

7 Refer to paragraph "vTM 11-5820-1048-24 & to paragraph and look at the procedure. The "INITIAL SETUP" section will tell you what tools,materials, and parts (if any) are needed to do this task. It will also tell you anything you must do beforestarting this task and gives general warnings about hazards that can exist while you do this procedure itself has a picture to show you where to look and what to look at, plus the steps you will doto perform the the numbered arrows. These are the callout numbers. As you read each step, we tell you where tolook by including the call out number (in parentheses) after the name of each thing we call the procedure, then check to see if you have corrected the 11-5820-1048-24 &PFigure 1-1.

8 radio Set AN/PRC-127(vii blank)/10TM 11-5820-1048-24 &PCHAPTER Forms, Records, and Index of Army Publicationsand Blank of Army Materiel to PreventEnemy for Storage or Assurance/Quality Cross-Reference equipment ImprovementRecommendations (EIR)..1-81-3 Warranty Information1-91-3 equipment Characteristics, Capabilities,and and Description of Major , Care, and Functional I. general of MANUAL : Unit, DIRECT support and general support maintenance : radio Set of equipment : The AN/PRC-127 is a light weight, hand held portable radio set. It provides shortrange two way voice communications in applications where full environmental hardening and interoperabilitywith other families of combat net radios are not required.

9 Examples of such applications include but are notlimited to internal communications for Combat support and Combat Service support FORMS, RECORDS, AND of maintenance and Unsatisfactory equipment . Department of the Army forms and proceduresused for equipment maintenance will be those prescribed by DA Pam 738-750, as contained in MaintenanceManagement 11-5820-1048-24 & of Packaging and Handling Deficiencies. Fill out and forward SF 364 Report of discrepancy(ROD) as prescribed in AR 735-11-2/DLAR 400-54/MCO in Shipment Report (DISREP) (SF 361). Fill out and forward Discrepancy in Shipment Report (DISREP)(SF 361) as prescribed in AR 55-38/NAVSPINST 75-18/MCO INDEX OF ARMY PUBLICATIONS AND BLANK FORMSR efer to the latest issue of DA Pam 25-30 to determine whether there are new additions, changes, or additionalpublications pertaining to the OF ARMY ELECTRONICS MATERIELD estruction of Army electronics materiel to prevent enemy use shall be in accordance with TM FOR STORAGE OR SHIPMENTI nstructions on preparation for storage or shipment are found in Chapter 2, Section ASSURANCE/QUALITY CONTROL (QA/PC)

10 repair and replacement standards for the radio set are given in the maintenance chapters of this MANUAL . Byreplacing parts that do not meet the tolerances given by test equipment readings and adjustments, quality controlof the equipment will be CROSS-REFERENCE LISTC ommon names will be used when major system components are mentioned in this NameOfficial NomenclatureRadio set radio Set AN/PRC-127R/TReceiver/Transmitter RT-1594/PRC-127 AntennaAntenna AS-3960/PRC-1271-2TM 11-5820-1048-24 & equipment IMPROVEMENT RECOMMENDATIONS (EIR)If your radio set needs improvement, let us know. Send us an EIR. You, the user, are the only one who can tellus what you don't like about your equipment .