TM 11-6625-2405-15D E P A R T M E N T O F T H E A R M Y T E C H N I C A L M A N U A L

OPERATOR ORGANIZATIONAL DS, GS

MAINTENANCE MANUAL

MAINTENANCE ACCESSORY KITMK-1192/ARM

/

This copy is a reprint which includes currentpages from Changes 1.

HEADQUARTERS, DEPARTMENT OF THE ARMY

9 AUGUST 1969

Change No. 1

TM 11-6625-2405-15C1

HEADQUARTERSDEPARTMENT OF THE ARMYWashington, D. C., 29 June 1973

Operator, Organizational, Direct Support,and General Support Maintenance Manual

MAINTENANCE ACCESSORY KIT MK-1192/ARM

TM 11-6625-2405-15,9 August 1969, is changed as follows1. New or revised material is indicated by a vertical bar.2. Title of the manual is changed as indicated above.3. Remove old pages and insert new pages as indicated below:

Remore paws h1817t mf%

1-1 through 1-8 1-1 through 1-82-1 through 2-4 2-1 through 2-43-1 and 3-2 3-1 and 3-2B-1 and B-2 B-1

4. File this change sheet in front of the publication for reference purposes.

By Order of the Secretary of the Army:

Official:VERNE L. BOWERSMajor General, United States ArmyThe Adjutant General

CREIGHTON W. ABRAMSGeneral, United States ArmyChief of Staff

Distribution:To be distributed in accordance with DA Form 12-36A (qty rqr block no. 1112), Organizational maintenancerequirements for avionics literature, MK-1192/ ARM.

TM 11-6625-2405-15

TECHNICAL MANUAL HEADQUARTERS,DEPARTMENT OF THE ARMY

No. 11-6625-2405-15 WASHINGTON, D, C., 9 August 1969

OPERATOR, ORGANIZATIONAL, DS, GS, AND DEPOT MAINTENANCE MANUAL

MAINTENANCE ACCESSORY KIT MK-1192/ARM

ParagraphCHAPTER 1. INTRODUCTIONS e c t i o n I . G e n e r a l

Scope- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Indexes of publications Forms and records- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

II. Description and dataPurpose and use- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - --Technical characteristics- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - List of components- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Description of equipment- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Description of components

1-11-21-3

1-41-51-61-71-8

CHAPTER 2. INSTALLATION AND OPERATING INSTRUCTIONSSection I. Service Upon Receipt of Equipment

Unpacking- - - - - - - - - - - - - - - - - - - - - - - - - - - - --- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -2-1Checking unpacked equipment- - - - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - - - - 2-2Installation- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - - - - 2-3

II. OperationGeneral 2-4Connections Test procedures --- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

CHAPTER 3. MAINTENANCESection I. Organizational Maintenance

Scope of organizational maintenance --------------------------------------------Tools and materials required -------------------------------------------------

II. Preventive Maintenance ProceduresPreventive maintenance- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Daily preventive maintenance checks and services- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Monthly preventive maintenance checks and services- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Cleaning- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Touch-up painting instructions- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

III. DS, GS, and depot maintenanceGeneral- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Troubleshooting- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Repairs - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

CHAPTER 4. SHIPMENT, LIMITED STORAGE, AND DEMOLITIONOF MATERIEL

Section I. Shipment and Limited StorageDisassembly of equipment- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - - - Packaging for shipment- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

II. Demolitionof Materiel to Prevent Enemy UseAuthority for demolition- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

2-52-6

3-13-2

3-33-43-53-63-7

3-83-93-10

4-14-2

4-3Methods of destruction- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-4

APPENDIX A. REFERENCES - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -B. BASIC ISSUE ITEMS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - C. MAINTENANCE ALLOCATION - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Page

1-11-11-1

1-11-11-21-21-2

2-12-12-1

2-12-12-2

3-13-1

3-13-13-23-23-2

3-23-33-3

4-14-1

4-14-1A-1B-1C-1

i

TM 11-6625-2405-15

Figure 1-1. Maintenance accessory kit, miscellaneous parts sect ion closed.

Figure 1-2. Maintenance accessory kit, miscellaneous parts section opened.

1-0

TM 11-6625-2405-15CHAPTER 1

INTRODUCTION

Section I. GENERAL

1-1. ScopeThis manual describes Maintenance Accessory KitMK-1192/ARM (figs. 1-1 and 1-2) and includes instal-lation, operating instructions, maintenance. instruc-tions, shipment, limited storage, and demolition toprevent enemy use. The manual provides instructionsfor operation, cleaning, inspection of equipment,and replacement of parts.

1-2. Indexes of Publications

a. DA Pam 310-4. Refer to the latest issue of DAPam 310-4 to determine whether there are new edi-tions, changes or additional publications pertainingto the equipment.

b. DA Pam 310-7. Refer to DA Pam 310-7 to deter-mine whether there are modification work orders(MWO’S) pertaining to the equipment.

1-3. Forms and Recordsa. Reports of Maintenance and Unsatisfactory

Equipment. Use equipment forms and records inaccordance with instructions in TM 38-750.

b. Report of Packaging and Handling Deficiencies.Fill out and forward DD Form 6 (Report of Packag-

ing and Handling Deficiencies) as prescribed inAR 700-58 (Army), NAVSUP Publication 738 (Navy),AFR 71-4 (Air Force) and MCO P4030.29 (MarineCorps).

c. Discrepancy in Shipment Report, (DISREP)(SF361). Fill out and forward Discrepancy in Ship-ment Report (DISREP) (SF361) as prescribed inAR 55-38 (Army), NAVSUP Publication 459 (Navy),AFR 75-34 (Air Force), and MCO P4610.19 (MarineCorps).

d. Report of Equipment Manual) aImprovements.Report of errors, omissions, and recommendationsfor improving this equipment manual by the in-dividual user is encouraged. Reports should be sub-mitted on DA Form 2028 (Recommended changesto DA Publications) and forwarded direct to the Com-mander, US Army Electronics Command, Attn:AMSEL-MA-AC Fort Monmouth, N.J. 07703.

1-3.1. Administrative Storage

Administrative storage shall be in accordance withTM 740-90-1.

Section II. DESCRIPTION AND DATA

1-4. Purpose and Use

a. Purpose. Maintenance Accessory Kit MK-1192/ARM (maintenance accessories kit) is a testaccessories kit which provides extender cards, ex-tender cables, breakout boxes and adapters to beused as needed when testing Standard LightweightAvionics Equipment (SLAE) Radio Sets AN/ARC-114. AN/ARC-115, and AN/ARC-116.

b. Use. The maintenance accessories kit is usedin conjunction with Test Facilities Kit MK-994/ARat the direct support area in the testing and repairof SLAE radio sets. With the maintenance acces-sories kit, the MK-994/AR, and standard test equip-

ment, a test facility is available for troubleshootingand isolating faults to a front or rear section of aradio set or to a pluckout printed circuit card. Thistest facility is also used for certain alignment, repairand operational checkouts allocated to direct sup-port maintenance levels.

1-5. Technical Characteristics

The maintenance accessory kit is completely a pas-sive device that makes connections and affords testpoints for otherwise inaccessible circuits in theSLAE radio sets. All power is supplied from externalsources. Overall weight of

Change 1 1-1

1-2

TM 11-4625-2405-15

the maintenance accessory kit is 30 pounds; case can conveniently be divided into those that are

displacement is approximately 1.6 cubic used for testing specific radio sets and those that

f e e t . are used in testing more than one radio set.

1-6. List of ComponentsCommon names shown for each unit are usedthroughout the manual.

The components of the maintenance accessory kit a. Common accessories

Nanemclature Cemu40n name

Case, Maintenance AcceaaorY camKit CY+774/ARM

Teminatiom Box MX+500/ Temnination BoxARM

Adapter, Connector UG- Adaptar jack BNC914/u

Adapter, Connector UG Tee connector1893/u

Adapter, Conneotvr UG Adapter, TPS bo BNC1894/u (3 each)

Adapter, Cennmtor UG Adapter, jack to jack1895/U

Cable Aaaambly, Special Double banana plug cablePurpose, Electrical CX-12175/ARM

Cable Asaemblyl Special Banana plug to BNC cablePurpose, El-rid CX-lz176/ARM

b. AN/ARC-11.b aCC688Wi68.

1 -2

1-3

Nomenclature

Adapter, Breskout MX-8497/ARM

Cable Aataxnbly, Special Pur-pose, Electrical CX-li3172/ARM

E~der Group, Module OA-8540/ARM, conaiating of:

MP-9874

MP-9875

MP-9666MP-9868

MP-9867

Canmoaauw

Breakout box

Extender cable

Extender carda

Lf. A1A6A’7 or AlA6A15card exbender

AIA5A8 thl’OUgh &A6A.14cad extender

Voo card AIA5A16 extender

DhwndwM (In)

Eelght/Lewth DeDth

8 17-1/2

3 24

39

m-

Dlmandmu (tn.)

WlaM/Lenatb Dedh

10 9

12

Switched filter card AIA5JL18 4 -I* 1;4extender

Oscillator/divider card AlA5&7 4 .l~ 1/4ext.ader

c. AN/ARC-llS (ZCC888(Wi88.

Nomenclature Omluumaaau

Adapter, Breakout MX-8498/ Bremkout boxARM

Ckble Aaeembly, Special Puw Extender cablepose, Electrical CX-12178/ARM

Extender Group, Module OA- Extender camla8641/ARM, conaiating of:

mm~ (h.)Eeight/Lea@b Depth

10 s

12

Wldtb26+4

2--+

6-2/4

24

%7/8

4-8/44+4

4-8/4

width

6+/4

Figure No.

1-8

1-8

1-2

1-2

1-8

1-8

Figure No.

1-1

1-7

1-4

1-1

1-4

1-41-4

1-4

Figure No.

1-1

1-7

1-5

Change 1

1-3

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NomenclaturexnmauIOru (la.)mnmoa llama

Wtghmemgttl ~@bFigure No.

widthMP-9874 Lf. AIA2A5 or AlAZAll 4-1/8 * A 1-5

~ extenderMP-96T5 AIA2A4 and A-IA2AGAIA2AI0 4.@ * 2-7/8 1-5 I

card extenderhfP-9870 Vw and dig/analog ard 4 -1/8 1/4 4+4 1-5

AIA2A3 extenderMP-9869 Switched filter card AlA2AJI 4 -1/8 1/4 4+4 1-s

extmderIKP-9876 Owillator divider card AlA2A2 4 -1/8 1/4 4-8/4 1-6

extender

& AN/ARC-116 47CCt388(Wi88.

Adapter, Breakout MX- Breekout bOX 1-18499/ARM

Cable Assembly, Special Pw Extender cde 1-7poeej Electrical CX-12174/ARM

Extender Group, Module OA- Exteader cards 1-68S4L?/ARM, wnsisting of:

MP4874 If. amplifier filter CA A,1A9 4 -1/8 * 2-?$ 1-6or AIA15 extender

MP-987S JUA8, AlAlIkAlA14, and 4 -l/l) n/4 s-7/8 1-6AlAl6 card extender

HP4872 Owillator divider cad AdA6 4 -1/8 * 4+4 1+extender

MP-9871 Switchai filter card AlA5 4 .1/8 * 4+4 n-dextender

MP-687S Vm digital/knalag cad AIA7 4 -1/8 * 4-3/4 1-6extender

1-7. Description of Equipment

(figs. 1-1 End 1-2)

The maintenance accessory kit contains breakoutboxes, extender cards, sets of extender cards,adapters, and a termination box with connectingcables, housed in a lightweight transit case (fig.1-3). The breakout boxes are shown in place infigure 1-1; all other components are held inplace under a cover in the other side of the case.Three captive snap fasteners secure the cover inplace. On the rear of the cover (fig. 1-2), sepa-rate compartments are provided to hold the threesets of extender cards and the technical manual.Snaps secure the six adapters. The termninationbox and extender cables are held in place bystraps in the floor of the compartment.

1-8. Description of Components

a. Case (fig. 1-3) There is a single handle onthe lightweight fiberglass case. Two twist-release latches secure the two halves of thehinged case together.

b. Extender cards. (figs. 1-4, 1-5, and 1-6).The extender cards provide straight-through con-

10

18

6-3/4

nection between the sockets of pluckout printedcircuit cards and the printed circuit card. Eachstraight-through line is provided with a test pointto permit electrical monitoring under operatingconditions. The extender cards are provided ingroups for each radio set. Some extender cardscan only be used in one socket; others can be usedin several sockets of the same radio set (see para-graph 1-6b, c, and d, Common ‘name col-u m n , fo r th is in fo rmant ion) . In add i t ion ,certain cards allocated for testing of one radioset can be used for other radio sets as well. Inthe chart below, cards shown on the same linecan be used interchangeably from set to set.Where only one card is shown on a line, there isno interchangeability.

AN/AW-lM A2VA2t0-116 AN/ARGl 16(OA-6640/-) (OA-864VARM (OA-6642/AR?A

MP-9866 .-MP4868 W--9869MP-9W MP-9876 MP-;~72MP-9874 MP-9674 MP-9874MP-9675 MP-9875 MP-9875

.- -- MP-9S71-- MP-9873-- MP-;~70 --

T M 1 1 - 6 6 2 5 - 2 4 0 5 - 1 5

Figure 1-3. Case, Maintenance Accessory Kit CY-6774/ARM.

c. Breakout boxes (figs. 2–1, 2–2, 2–3). Thethree breakout boxes as shown in figure 1–1 aresimilar in appearance. Each has a connector onone side of the box, three cables and a toggleswitch on the other side, and two sets of testpoints on top.

(1) One set of test points (labeled A2J1)is used to make measurements in the power andcontrol circuit lines to the radio set. The in-linetest points also are connection points between thecable to the rear of the radio set and the linesfrom connector J1. Connector J1 accepts connec-tion from Test Facilities Kit MK-994/AR whichis used for testing the radio set. Each test pointis lettered with the respective pin numbers of thejacks to correlate use with t e radio set technicalmanuals. By use of the toggle switch, input cur-rent can be metered at the two red test pointslabeled D and D1.

(2) The other set of test points gives accessto the connecting lines between the front andrear sections of the radio set under test. The test-point terminals are the connection points for thewires brought to the breakout box by the twocables to the radio set halves. Figures 2-1, 2-2,and 2-3 show the breakout boxes connected todisassembled radio sets. Each test point is let-tered with the respect ive pin numbers of thejacks to correlate use with the radio set technicalmanuals.

1-4

d. Extender cables (fig. 1–7). The three ex-tender cables connect the front and rear sectionsof respective disassembled radio sets. The separa-tion provides access to interior points for dynamictesting and adjusting while the radio set is con-nected to Test Facilities Kit MK-994/AR.

e. Termination box and associated cables ( f ig .1-8). The termination box and associated cablesare provided for testing of radio set audio cir-cui ts . Proper terminat ion for microphone andheadset c ircui ts is provided. A cable with aU-93AL/U plug connects the termination box to acable (terminated by a U–92A/U jack) from TestFacilities Kit MK–994/AR. Double banana jacksmarked MIC and HDST provide connection totest equipments through the CX-12175/ARM orthe CX-12176/ARM. The CX-12175/ARM hasa d o u b l e b a n a n a plug at each end; theCX-12176/ARM has a double banana plug atone end and a BNC connector (UG-88/U) at theother end.

f. Adapters (fig. 1-2). Four types of coaxialadapters are provided. The UG-1894/U (3 S U P-plied) provides a tps-to-bnc connection, the UG-1895/U interconnects cables with Conhex con-nectors, the UG-914/U is a straight-through bncconnector adapter, and the UG-1893/U acceptsConhex connectors in a tee connection. Specificuse of the cornnectors is explained in test setupinstructions in the DS procedures sections of indi-vidual radio set maintenance manuals.

Figure 1-4. Extender cards for Radio Set AN/ARC-114, OA-8540/ARM.

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1-5

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Figure 1-5. Extender cards for Radio Set AN/ARC-115, OA-8541/ARM.

1-6

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Figure 1-6. Extender cards for Radio Set AN/ARC-116, OA-8542/ARM.

1-7

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Figure 1-7. Extender cables.

1-8

Figure 1-8.

TM 11-6625-2405-15

TM 11-6625-2405-1H5

CHAPTER 2

INSTALLATION AND OPERATING INSTRUCTIONS

Section I. SERVICE UPON RECEIPT OF EQUIPMENT

2-1. Unpacking

When packed for shipment, the maintenance ac-cessories kit is placed in a corrugated shippingcarton. The outside dimensions of the carton areapproximately 10 by 19 by 22 inches. The volumeis approximately 1.3 cubic feet. Open the topflaps of the corrugated carton, fold them back,and remove the MK-1192/ARM.

2-2. Checking Unpacked Equipment

a. Inspect the maintenance accessories kit fordamage incurred during shipment. If the mainte-nance accessories kit has been damaged, reportthe damage on DD Form 6 (para 1-3 b).

b. See that the maintenance accessories kit iscomplete as listed on the packing slip. If a pack-ing slip is not included, check the kit against the

listings in paragraph 1-6. Report all discrepan-cies in accordance with TM 38-750. Shortage of aminor assembly or part that does not affect pro-er functioning should not prevent use of themaintenance accessories kit.

2-3. Installation

No specific installation instructions are required.The accessories are ready for immediate use uponarrival at the direct support unit. The work benchto be used should be of suitable size to accommo-date a Test Facilities Kit MK-91914/AR, the radioset to be checked, applicable components of themaintenance accessory kit (para 1-6) and othercommon test equipment such as a multimeter,signal generator etc. used for testing the radioset. A convenient source of 28 volts dc is re-quired for the MK-994/AR.

Section Il. OPERATION2-4. General

The maintenance accessories kit is a passive de-vice and contains only one operating control, theON-OFF switch on each breakout box. Asidefrom use of that toggle switch, there is no opera-tion as such. By use of the termination box andassociated cables (connected through the cordand U-93A/U plug to the MK-994/AR) audiosignals can be applied to the microphone circuitsof the radio set and audio output signals fromthe radio set can be monitored and measured. Inaddition, direct support level maintenance per-sonnel are afforded access to the following:

a. Certain adjustment points inside the radios.

b. Voltage- and resistance- measurementpoints in the line between the MK-994/AR andthe external power and control connector (A2J1)

the radio set.

c. Voltage- a n d resistance- measurementpoints in the front-rear connector of the radio set.

d. Voltage- and resistance- measurement test

points on extendercards.

2-5. Connections

boards for printed circuit

(figs. 2-1-2-7)

Specific items of the maintenance accessory kit tobe used in testing any radio sets are specified inthe direct support technical manual (AppendixA) for that radio set. Similarly, the connectionsto be made, the card extenders to be used, andadapter connectors needed, depend on the testsor measurments to be performed.

a. Place the components on a work bench nearthe test facilities kit and the power source.

b. Open the radio set to be tested; follow in-structions in the applicable technical manual toseparate the front and rear halves and to removetop or bottom covers as required.

NoteIf in-line measurements are required, use break-out box; if only internal measurements or cer-tain adjustments are to be made, use the ex-tender cable.

2-1

Change 1

TM 11-6625-2405-15

c. Connect the breakout box or extender cablebetween the front and rear radio set halves asshown in figures 2-1, 2-2, and 2-3 for Radio SetsAN/ARC-114, AN/ARC-115, and AN/ARC-116, respectively, with breakout boxes, or in fig-ures 2-4, 2-5, and 2-6 for the same radio setswith extender cables.

d. Connect a power and control cable fromRADIO SET No. 1 jack J1 on the test facilitieskit to J1 of the breakout box, if used, or to therear of the radio set if an extender cable is used.Cable CX-10889/U is used in Radio Set AN/ARC-114 tests and CX-10891/U is used in testsof Radio Sets AN/ARC-115 or AN/ARC-116.These cables are part of the MK-994/AR.

e. If the termination box (fig. 1-8 ) is re-quired, plug its jack into the U-92A/U connec-tor of the CX-10888/U cable from the HEAD-SETS 1 connector on the MK–994/AR. CablesCX-12175/ARM and CX-12176/ARM are sup-plied to connect the termination box to audio in-put or audio output test equipments (MIC orHDST double banana plug jacks respectively).The audio circuits are connected through the ter-mination box, cable CX-10888/U, the MK-994/AR, and cable CX-10889/U or CX-10891/U (dabove) to the breakout box or directly to the rearof the radio set.

f. If a breakout box is used, check to see that

the toggle switch is set to OFF.g. Connect the test facilities kit to the power

source.

2-6. Test Procedures

The DS ,GS, and Depot Maintenance manuals forRadio Sets AN/ARC-114, AN/ARC-115, andAN/ARC-116 give specific instructions for allprocedures required during testing. In respect tothe maintenance accessory kit, most instructionsinvolve the making of connections as described inparagraph 2-5 and the use of the UG914/U,UG-1893/U, UG-J1894/U, and UG-1895/Uadapters.

a. For all dynamic tests, or for any voltagechecks, applicable controls on Test Facilities KitMK-994/AR must be set to on, the toggle switch on the breakout box must be set to ON, and thefunction selector switch on the radio set placed inany position except OFF. For resistance checks,either disconnect power to the MK-994/AR orset the toggle switch on the breackout box to OFF.This permits measurements on the input lines(jacks on breakout boxes labeled A2J1 ), on ex-tender cards (b below), various accessible pointson the radio set exposed front and rear sections,and at the front-rear section connectors (at thelower set of jacks on the breakout boxes (figs.2-1, 2-2, and 2-3 )). In evaluating resistance or

Figure 2-1. Breakout box connected to AN/ARC-114 sections.

2-2

Figure 2-3.

2-3

TM 11-6625-2405-15

Figure 2-2. Breakout box connected to AN/ARC-115 sections.

2-4

TM 11-6625-2405-15

voltage measurements at any of these points, besure to take into account the position of the func-tion selector switch on the front panel of the ra-dio set.

Caution

Connecting pins on the 4-3/4” wide ex-tender boards are easily damaged. Becareful to avoid bending any of thesewhile inserting boards into the radio setor connecting pluck-out boards into theextender cards.

b. When voltage or resistance checks on pluck-out cards are required, remove the card to bechecked and insert the proper card extender intothe empty socket. The card extender to be used islisted in paragraph 1-6b, c, or d for Radio Sets

Figure 2-4. Extender cable between AN/ARC-114 sections.

AN/ARC-114, AN/ARC-l15, and AN/ARC-116 respectively. (The card extenders are identi-fied by “MP-xxxx” numbers placarded on each ex-tender. ) Insert the removed card into the card ex-tender. Voltages and resistances car. be checkedat test points in each connecting line as well astest points provided on the pluckout cards.

c. To measure input current draw, turn off thepower source and set the toggle switch on thebreakout box to OFF. Connect an ammeter (or amultimeter set for current measurements) tojacks D and D1 of the A2J1 test points. Turn onthe power source, and set the radio set functionselector switch to any position other than OFF.Keep the toggle switch of the breakout box atOFF; closing that switch will short terminals Dand D1 and the ammeter will read zero.

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TM 11-6625-2405-15

Figure 2-5. Extender cable between AN/ARC-115 sections.

2 - 5

Figure 2-6.

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2-6

2-7

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Figure 2-7. Typical SLAE radio set test setup.

TM 11-6625-2405-15

CHAPTER 3

MAINTENANCE

Section I. ORGANIZATIONAL MAINTENANCE

3-1. Scope of Organizational Maintenance c. Cleaning (para 3-7)d. Touchup painting (para 3-8).The maintenance duties assigned to the operator

and organizational repairman of the equipmentare listed below, together with a reference to the 3-2. Tools and Materials Required

paragraphs covering the specific maintenance Tools required for organizational maintenancefunctions. Required tools and materials are listed are contained in Tool Kit, Electronic Equipmentin paragraph 3-2. TK-101/G. Materials needed are:

a. Daily preventive maintenance checks and a. Lint-free cloth.services ( para 3-5). b. Trichloroethane, technical, per Federal

b. Monthly preventive maintenance checks and Specification O-T-620, Type 1.services (para 3-6). c. Brush, MIL-G-7241.

Section Il. PREVENTIVE MAINTENANCE PROCEDURES

3-3. Preventive Maintenance

Preventive maintenance is the systematic care,servicing, and inspection of the equipment toprevent the occurrence of trouble, to reducedowntime, and to assure that the equipment isserviceable.

a. Systematic care. The procedures given inparagraphs 3-4 through 3-7 cover routine sys-tematic care and cleaning essential to proper up-keep and operation of the equipment.

b. Preventive maintenance checks and services.The preventive maintenanoe checks and servicescharts (para 3-4 and 3-5) outline functions to beperformed daily (or at least once per week if the

maintenance accessories kit is maintained in astandby condition) and monthly intervals. Thesechecks and services are to maintain the equipmentin good general (physical) condition and in goodoperating condition. The charts indicate what tocheck, how to check, and what the normal condi-tions are; the References column lists the illustra-tions, paragraphs, or manuals that contain de-tailed repair or replacement procedures. If thedefect cannot be remedied by performing the cor-rective actions listed, higher category mainte-nance or repair is required. Records and reportsof these checks and services must be made in ac-cordance with the requirements set forth in TM33-750.

3-4. Daily Preventive Maintenance Checks and Services ChartSequence Procedure

. Item to be inspected

1 Completeness See that the equipment is complete.

2 Exterior Clean the exterior surfaces of the case,breakout boxes, and the terminationbox.

3 cables Remove any grease, oil, or dirt fromcables and connectors.

4 Connectors Check the tightness of all connectors

References

Para 1-6

Para 3-6

Para 1-6

None

3-1

TM 11-6625-2405-15

3-5. Monthly Preventive Maintenance Checks and Services ChartSequence

No Item to be inspected Procedure References

1 Cables Inspect cables and wires for chafed, cracked, or frayed None

insulation. Replace (at DS category) connectors that are broken,

arced, stripped, or worn excessively.

2 Handles and latches Inspect case bandies, latches, and hinges None

for looseness. Replace or tighten as necessary.

3 Metal surfaces Inspect exposed metal surfaces for rust and cor- Para 3-7

rosion. Touch up paint as required.

4 Gasket Inspect case gasket for cracks and excessive wear. None

5 Interior Clean interior of case. None

6 Publications See that all publications are complete, serviceable, DA Pam 310-4

and current.

7 Modifications Check DA Pam 310-7 to determine whether new DA Pam 310-7

applicable MWO’S have been publisbed. All URGENT MWOSmust be applied immediately. All NORMAL MWO’S must bescheduled.

3-6. CleaningInspect the exterior of the equipment. The exteriorsurfaces and the case interior should be clean, andfree of dust, dirt, grease, and fungus.

a. Remove dust and loose dirt with a clean, dry,lint-free cloth.

WARNINGTrichloroethane fumes are toxic. Pro-vide adequate ventilation. DO NOT useon the fiberglass case. DO NOT use neara flame. Trichloroethane is not flammablebut exposure to high heat in a poorly ven-tilated area can convert the fumes to ahighly toxic gas.

b. Remove grease, fungus and ground-in dirtfrom the breakout and termination boxes; use acloth dampened (not wet) with trichloroethane. Wipedry with a clean cloth.

c. Remove dust and dirt from cable plugs andjacks with a brush. If necessary, apply trichloroe-thane sparingly with a brush.

d. Clean the transit case with a soft clean cloth. Ifdirt is difficult to remove, dampen the cloth withwater; mild soap may be used for more effectivecleaning.

3-7. Touch-up Painting Instructionsa. When the finish on the breakout and termina-

tion boxes are scarred or damaged, corrosion maybe prevented by touch-up painting of the surfacesas outlined below.

(1) Use No. 000 sandpaper to clean the surfacedown to the bare metal; obtain a bright smoothfinish.

(2) Sand the area back to solid paint and featherthe paint edge that leads to the exposed metal.

(3) Wipe the area clean and apply one coat of zincchromate metal primer FSN 8010-835-2114, and twothin finish coats of enamel to metal surfaces.

b. When a touch-up paint job is necessary, applypaint with a small brush. For the proper care of thebrushes and painting equipment refer to TM 9-213and TB SIG 746-10.

Section Ill. DS AND GS MAINTENANCE

3-8. General categories. The only test equipment required forThe DS and GS maintenance procedures supplement electrical troubleshooting is Multimeter TS-352B/U;the procedures described in Section II. The mainte- all repairs can be effected using Tool Kit, Electronicsnance operations performed are the same at all Equipment TK-105/G.

3 - 2 Change 1

3-3

TM 11-6625-2405-15

3-9. Troubleshooting

Visual inspection and continuity checking are theonly techniques required for troubleshooting themaintenance accessory kit. Figures 3-1, 3-2, and3-3 are schematic diagrams of BreakoutAdapters MX-8497/ARM, MX-8498/ARM,and MX-8499/ARM, respectively. All circuitsare straight through (zero ohms) and the testjacks are labeled with the same designations asthe connector pins. The extender cables use thesame terminal pins as shown for the breakout boxfront and rear section cables. Similarly the ex-tender cards are straight through and each line ischecked end-to-end and to the associated testpoint. Figure 3-4 is the schematic diagram of thetermination box. The resistance across the HDST

terminals is 8.2 ohms; across the MIC terminals,the resistance is 5,100 ohms.

3-10. Repairs

Repair of the maintenance accessory kit consistsof replacing any defective components or wiring.The components are test point jacks on the break-out boxes, jacks on the termination box, and con-nectors on cable. Three components are all re-placed by standard soldering and other mechani-cal procedures. Specialized procedures for re-placement of the BNC connector on the CX-12176/ARM (fig. 1-8) are given in figure 3-5.The extender boards are considered non-repairable.

Figure 3-1.

TM

1

1-6

62

5-2

40

5-1

5

3-4

Figure 3-2.

TM

1

1-6

62

5-2

40

5-1

5

3-5

Figure 3-3.

TM

1

1-6

62

5-2

40

5-1

5

3-

6

Figure 3-4.

TM 11-6625-2405-15

3-7

Figure 3-5.

TM 11-6625-2405-15

3-8

TM 11-6625-2405-15

CHAPTER 4

SHIPMENT, LIMITED STORAGE, AND DEMOLITION

OF MATERIEL

Section I. SHIPMENT AND LIMITED STORAGE

4-1. Disassembly of Equipment(figs. 1-1 and 1-2)

Prepare the maintenance accessories kit for shipment or storage as follows:

a. Disconnect all cables from the maintenanceaccessories kit connectors.

b. Check to see that all retaining screws on thebreakout boxes and the termination box areSecure.

c. Coil each cable assembly carefully andplace the cables and the termination box (fig.1-2) into the cover of the maintenance accesso-ries kit carrying case. Sucure the cables with theretaining straps.

d. Group the extender cards into sets as listedin b, c, and d of paragraph 1-6, wrap in clear

plastic, if available, and place in cover compart-ments as shown in figure 1-2.

e. Snap the small adapters into their clips asshown in figure 1–2.

f. Insert the technical manual into the com-partment provided.

g. Set the breakout boxes into their respectivebrackets (fig. 1-1).

h. Close the case and secure the latches.

4-2. Packaging for ShipmentWrap the maintenance accesories kit in water.proof paper and place the package in a corru-gated carton. Use reinforced gummed tape forsealing the corrugated cartons. If limited storageis expected, place the carton within an outer car-ton and seal.

Section Il. DEMOLITION OF MATERIEL TO PREVENT ENEMY USE

4-3. Authority for DemolitionThis equipment, in relation to other equipmentson-site, will have a low order of priority for dem-olition. However, demolition of the equipmentwill be accomplished upon the order of the com-mander. The destruction procedures outlined inparagraph 4-4 will be used to prevent furtheruse of the equipment.

4-4. Methods of Destructiona. If a complete destruction of the equipment

cannot be accomplished in the time available, de-stroy the following components in the orderg i v e n :

(1) Breakout boxes.(2) Extender cards.(3) Extender cables and termination box.(4) Technical manuals.

b. Use any of the following methods:(1) Smash. Smash

sledges, axes, hand axes,crowbars.

(2) Cut. Cut cables(3) Burn. Burn the

gasoline, kerosene, or oil.

a l l components . Usepickaxes, hammers, or

and circuit wiring.technical manuals, use

(4) Dispose. Bury or scatter the destroyedparts in slit trenches, foxholes, or throw theminto streams.

4 - 1

TM 11-6625-2405-15

APPENDIX A

REFERENCES

DA Pam310-4

DA Pam 310-7SB 11-573

TB 746-10

TB SIG 222TM 9-213TM 11-5821-259-35TM 11-5821-260-35TM 11-5821-261-35TM 11-6625-366-15

TM 11-6625-928-12

TM 11-6625-2405-25P

TM 38-760

Index of Technical Manuals, Technical Bulletins, Supply Manuals, (Types4,6,7,8, and 9) Supply Bulletins and Lubrication Orders.

U.S. Army Equipment Index of Modification Work Orders.Painting and Preservation Supplies Available for Field Use for Elec-

tronics Command Equipment.Field Instructions for Painting and Preserving Electronics Command

equipment.Solder and Soldering.Painting Instructions for Field Use.DS, GS, and Depot Maintenance Manual: Radio Set AN/ARC-114.DS, GS, and Depot Maintenance Manual: Radio Set AN/ARC-115.DS, GS, and Depot Maintenance Manual: Radio Set AN/ARC-116.Organizational, DS, GS, and Depot Maintenance Manual: Multimeter TS-

352B/U.Operation and Organizational Maintenance Manual: Test Facilities Kit

MK-994/AR.Organizational, DS, GS, and Depot Maintenance Repair Parts and Special

Tool Lists: Maintenance Accessories Kit MK-1192/ARM,Army Equipment Record Procedures.

A-1

TM 11-6625-2405-15APPENDIX B

(Deleted)

Change 1 B-1

C-1

Section III.

TM 11-6625-2405-15

APPENDIX C

MAINTENANCE ALLOCATION

Section I. INTRODUCTION

C-1. GeneralThis appendix provides a summary of the mainte-nance operations covered in the equipment litera-ture for Maintenance Accessories Kit MK-1192/ARM. It authorizes categories of maintenance forspecific maintenance functions on repairableitems and components and the tools and equip-ment required to perform each function. This ap-pendix may be used as an aid in planning mainte-nance operations.

C-2. Explanation of Format for MaintenanceAllocation Chart

a. Group Number. Group numbers indicatethe relation of listed items to the next higherassembly.

b. Component Assembly Nomenclature. Thiscolumn lists the item names of component units,assemblies, subassemblies, and modules on whichmaintenance is authorized.

c. Maintenance Function. This column indi-cates the maintenance category at which perform-ance of the specific maintenance function is au-thorized. Authorization to perform a function atany category also includes authorization to per-form that function at higher categories. Thecodes used represent the various maintenance cat-egories as follows:

Code Maintenance category

C Operator/CrewO Organizational MaintenanceF Direct Support MaintenanceH General Support MaintenanceD Depot Maintenance

d. Tools and Equipment. The numbers ap-pearing in this column refer to specific tools andequipment which are identified by these numbersin section III.

e. Remarks. Self explanatory.

C-3. Explanation of Format for Tool and TestEquipment Requirements

a. Tools and Equipment. The numbers in thiscolumn concide with the numbers used in thetools and equipment column of the MAC. Thenumbers indicate the applicable tool for the main-tenance function.

b. Maintenance Category. The codes in thiscolumn indicate the maintenance category nor-mally allocated the facility.

c. Nomenclature. ‘Ihis column lists tools, test,and maintenance equipment required to performthe maintenance functions.

d. Federal Stock Number. This column liststhe Federal stock number.

e. Tool Number. Not used.

Section III.

Section III.

TM 11-6625-2405-15

Section IV.

C-2

TM 11-6625-2405-15

By Order of the Secretary of the Army:

Official:

W. C. WESTMORELAND,General, United States Army,Chief of Staff.

KENNETH G. WICKHAM,Major General, United States Army,The Adjutant General,

Distribution:

To be distributed in accordance with DA Form 12-36 requirements for 3 copies to each account.

PIN: 017631-000

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