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1、Changes in force: C1, C2, C3, and C4 CH A N G E NO. 4 TM 11-6625-622-12 C 4 HEADQUARTERS DEPARTMENT OF THE ARMY WASHINGTON, D.C., 28 December 1976 Operators and Organizational Maintenance Manual Including Repair Parts and Special Tools List TEST HARNESS, RADIO SET AN/URM-157 (NSN 6625-00-766-4685) A
2、ND AN/URM-157A (NSN 6625-00-236-1557) TM 11-6625-622-12, 10 December 1964, is changed as follows: The title is changed as indicated above. Page 3, paragraph 1-3. Delete subparagraphs b and c and substitute: b. Report of Packaging and Handling Deficien- cies. Fill out and forward DD Form 6 (Packaging
3、 Im- provement Report) as prescribed in AR 700-58/ NAVSUPINST 4030.29/AFR71-13/MCO P4030.29A, and DSAR 4145.8. c. Discrepancy in Shipment Report (DISREP) (SF 361). Fill out and forward Discrepancy in Shipment Report (DISREP) (SF361) as prescribed in AR 55-38/ NAVSUPINST 4610.33A/AFR 75-18/MCO P4610.
4、19B, and DSAR 4500.15. Paragraph 1-3-1. Delete paragraph 1-3.1 and sub- stitute: 1-3.1.Reporting of Errors The reporting of errors, omissions, and recommenda- tions for improving this publication by the individu- al user is encouraged. Reports should be submitted on DA Form 2028 (Recommended Changes
5、 to Publi- cations and Blank Forms) and forwarded direct to Commander, US Army Electronics Command, ATTN: DRSEL-MA-Q Fort Monmouth, NJ 07703. 1-3.2. Reporting Equipment Improve- ment Recommendations (EIR) EIR will be prepared using DA Form 2407 (Main- tenance Request). Instructions for preparing EIR
6、s are provided in TM 38-750, the Army Maintenance Management System. EIRs should be mailed direct- ly to Commander, US Army Electronics Command, ATTN: DRSEL-MA-Q, Fort Monmouth, NJ 07703. A reply will be furnished directly to you. Page 25, appendix II. Delete appendix II and sub- stitute: APPENDIX I
7、I MAINTENANCE ALLOCATION Section I.INTRODUCTION A2-1. GeneralA2-2. Maintenance Function This appendix provides a summary of the mainte- nance operations for AN/URM-157 and AN/URM- 157A. It authorizes categories of maintenance for specific maintenance functions on reparable items and components and t
8、he tools and equipment re- quired to perform each function. This appendix may be used as an aid in planning maintenance operations. Maintenance functions will be limited to and defined as follows: a. Inspect. To determine the serviceability of an item by comparing its physical, mechanical, and/or el
9、ectrical characteristics with established standards through examination. b. Test. To verify serviceability and to detect incip- ient failure by measuring the mechanical or electri- This reprint contains the basic 1 p u b l i c a t i o n d a t e d 1 0 D e c e m b e r 1 9 6 4 a n d c h a n g e s 1 t h
10、 r o u g h 4 . cal characteristics of an item and comparing those characteristics with prescribed standards. c. Service. Operations required periodically to keep an item in proper operating condition, i.e., to clean, preserve, drain, paint, or to replenish fuel/lu- bricants/hydraulic fluids or compr
11、essed air supplies. d. Adjust. Maintain within prescribed limits by bringing into proper or exact position, or by setting the operating characteristics to the specified para- meters. e. Align. To adjust specified variable elements of an item to about optimum or desired performance. f. Calibrate. To
12、determine and cause corrections to be made or to be adjusted on instruments or test measuring and diagnostic equipment used in preci- sion measurement. Consists of the comparison of two instruments, one of which is a certified standard of known accuracy, to detect and adjust any dis- crepancy in the
13、 accuracy of the instrument being compared. g. Install. The act of emplacing, seating, or fixing into position an item, part, module (component or assembly) in a manner to allow the proper func- tioning of the equipment/system. h. Replace. The act of substituting a serviceable like-type part, sub-as
14、sembly, model (component or assembly) for an unserviceable counterpart. i. Repair. The application of maintenance services (inspect, test, service, adjust, align, calibrate, re- place) or other maintenance actions (welding, grind- ing, riveting, straightening, facing, remachining, or resurfacing) to
15、 restore serviceability to an item by correcting specific damage, fault, malfunction, or failure in a part, subassembly, module/component/ assembly, end item or system. This function does not include the trial and error replacement of running spare type items such as fuses, lamps, or electron tubes.
16、 j. Overhaul. That periodic maintenance effort (service/action) necessary to restore an item to a com- pletely serviceable/operational condition as pre- scribed by maintenance standards (e.g., DMWR) in appropriate technical publications. Overhaul is nor- mally the highest degree of maintenance perfo
17、rmed by the Army. Overhaul does not normally return an item to like-new condition. k. Rebuild. Consists of those services/actions nec- essary for the restoration of unserviceable equipment to a like-new condition in accordance with original manufacturing standards. Rebuild is the highest degree of m
18、aterial maintenance applied to Army equipment. The rebuild operation includes the act of returning to zero those age measurements (hours, miles, etc) considered in classifying Army equip- ment/components. A2-3. Column Entries a. Column 1, Group Number. Column 1 lists group numbers, the purpose of wh
19、ich is to identify components, assemblies, subassemblies and modules with the next higher assembly. b. Column 2, Component/Assembly. Column 2 contains the noun names of components, assemblies, subassemblies, and modules for which maintenance is authorized. c. Column 3, Maintenance Functions. Column
20、3 lists the functions to be performed on the item listed in column 2. When items are listed without main- tenance functions, it is solely for purpose of having the group numbers in the MAC and RPSTL coincide. d. Column 4, Maintenance Category. Column 4 specifies, by the listing of a “worktime” figur
21、e in the appropriate subcolumn(s), the lowest level of main- tenance authorized to perform the function listed in column 3. This figure represents the active time re- quired to perform that maintenance function at the indicated category of maintenance. If the number or complexity of the tasks within
22、 the listed maintenance function vary at different maintenance categories, appropriate “worktime” figures will be shown for each category. The number of task-hours specified by the “worktime” figure represents the average time required to restore an item (assembly, subassembly, component, module, en
23、d item or system) to a service- able condition under typical field operating condi- tions. This time includes preparation time, trouble- shooting time and quality assurance/quality control time in addition to the time required to perform the specific tasks identified for the maintenance func- tions
24、authorized in the maintenance allocation chart. Subcolumns of column 4 areas follows: C Operator/Crew O Organizational F Direct Support H General Support D Depot e. Column 5, Tools and Equipment. Column 5 specifies by code, those common tool sets (not indi- vidual tools) and special tools, test, and
25、 support equipment required to perform the designated func- tion. 2 3 Page 32. Add appendix IV after appendix III. APPENDIX IV ORGANIZATIONAL REPAIR PARTS LIST Section I. INTRODUCTION A4-1. General a. The appendix lists the quantities of repair parts authorized for organizational maintenance and con
26、stitutes a basis of requisitioning when the major item of equipment is authorized to the orga- nization. These equipments are issued on the basis of allowance prescribed in equipment authoriza- tion tables and other documents which are a basis of requisitioning. b. Columns areas follows: (1) (2) (3)
27、 (4) (5) Federal stock number. This column lists the 11-digit Federal stock number. Designation by model. Not used. Description. Nomenclature or the stand- ard item name and brief identifying data for each item are listed in this column. When requisitioning, enter the nomen- clature and description.
28、 Unit of issue. The unit of issue is each unless otherwise indicated and is the sup- ply term by which the individual item is counted for procurement, storage, requisi- tioning, allowances, and issue purposes. Expendability.Nonexpendable items 02660 04009 are indicated by NX. Expendable items are no
29、t annotated. (6) Quantity incorporated in unit. This (7) (8) column lists the quantity of each part found in a given assembly, component, or equipment. Organizational The quantities indicated in this column are maximum levels of repair parts authorized to be kept on hand by units performing organiza
30、tional main- tenance. The quantities are based on 100 equipments to be maintained for a 15-day period. Illustration.The “Item No.” column lists the reference designations that ap- pear on the part in the equipment. These same designations are also used on any illustrations of the equipment. A4-2. Pa
31、rts for Maintenance When this equipment is used by signal service organizations organic to the theater headquarters or communication zones to provide theater com- munications, those repair parts authorized up to and including general support are authorized for stockage by the organization operating
32、this equip- ment. A4-3. Additional Repair Parts Authorization An asterisk (*) indicates that an item is not au- thorized for stockage but if required, maybe requi- sitioned for immediate use only. A4-4. Manufacturers Codes Following is a list of manufacturers codes and addresses: Code 00779 04796 05
33、973 06214 08664 08854 09190 09922 13499 14674 15605 17419 24446 Name and address Amp, Inc. Harrisburg, Pa. Amphenol-Borg Electronics Corp. Broadview (Chicago), Ill. Arrow-Hart and Hegman Electric Co. Hartford, Conn. Sequoia Wire Co. Redwood City, Calif. American Super-Temperature Wires, Inc. Winoosk
34、i, Vt. Atlas Spring and Manufacturing Co. Chicago, Ill. The Bristol Co. Waterbury, Conn. Lake Chemical Co. Chicago, Ill. Aluminum Co. of America Davenport, Iowa Burndy Corp. Norwalk, Conn. Collins Radio Co. Cedar Rapids Iowa Corning, (Glass Works Corning, N.Y. Cutler Hammer, Inc. Milwaukee, Wis. The
35、 Deutsch Co. Los Angeles, Calif. General Electric Co. Schenectady, N.Y. 4 6s474 nm 71466 74196 742s4 74V70 77147 xanoed odpDdgeco9per Product8corP New Yor t,o,4rlt( 111 714 E-1 Not used. 714 E-%Connects the C-3940/ARC-94 (714E-3) tothe receiver- transmitter. 300Q AL! DI O LOAD switch (2-position tog
36、gle)Selects a 300-ohm audio load. $U!jtlt fios(liovt.4rtmn INPlaces a 300-ohm load iri the audio output circuit. OUTRemoves the 300-ohm load from the audio output circuit. HEADSET jackProvides for connecting a headset to the receiver-trans- mitter through the test unit. MIKE jackProvides for connect
37、ing a microphone to the receiver- transmitter through the test unit. 600! BAL AUDIO IN jackProvides for connecting a 600-ohm balanced line audio input. to the receiver-transmitter through the test unit. DC POWER switch (2-position) Connects or disconnects the 27.5 volts dc power to the receiver-tran
38、smitter. A switch (2-position toggle) Connects or disconnects the operating 11.5 volts, 3-phase, 400-cps ac voltages to the receiver-transmitter. 12 TM 11-6625-622-12 b. Control Uuit Front Panel (fig. 2-2). Cc)nl!ol. lmlict(,r m tonnvctor Full, ,8:, ”,.!, /!)11 OFFNo operational twl may be per forme
39、d on 11)(I .,c!iv(l,-trails- mitter. l-megacycle control (28-position rotary switch) USBIemlits operation and testing the receiver-transmitter in the upper sdeband mode of Olw:l- tion. LSBPermits operation and t.cstln the receiver-transmitter in the lower sicleband mode of opera- tion. AMPermits ope
40、ration and testin the receiver-transmitter in tlw amplitude-modulated mod of operation. DATAPermits use of auxlliury data equipment. Used only i sys I terns which include data eqllip- ment. CwPermits operation and testing the receiver-transmitter in the continuous - wavemodeof operation. Selects por
41、tion of the receivcl-transmitter opelatng fre- quency in l-megacycle steps (first two digits, left to right). O.1-megacycle control (10-position rotary switch) I Selects portion of the receiver-transmitter operating fre- quency in O. I-megacycle steps (third digit, left to right). O.01-megacycle con
42、trol (10-position rotary switch) O.001-megacycle control (10-position rotary switch) Selects portio of the receiver-transmitter operating fre- quency in O.01-meacycle steps (fourth digit, left to right). Selects portion of the receiver-transmitter operating fle- quency in O.001-megacycle steps (fift
43、h digit, left to right). Frequency indicator (numerical display)I Indicates frequency in megacycle. RF SENS control I Controls rf sensitivity of the receiver-transmitter 13 TM 11-6625-622-12 Figure 2-2. Test unit front panel operating controls, indicators, and connectors. 14 TM 11-6625-622-12 c. Top
44、 Panel (fig. 2-3). Ct,lltrol orlonltxtor .1 . . . . Ful,c t,” 61ST-% connector (60-pin) I Provides electrical conertlons to the test unit fmnl Ill, lvcti,er- 1 transmitter under test. 61STI connector (60-in) Not used. . . . DIR WM RF IN coaxial connector DC IN connector (4-pin) AC IN connector (4-pi
45、n) lNT. CPLR connector (40-pin) DIR WM RF OUT ;NC connector 50fI RF LOAD BNC connector KEY INTLK switch (2-position togle) ,-I.iII)l FU*SI.; ,.-I.q12, Fl_SE. and .-A+3 FI-TSE 10 A 28V DC FUSE 516 H-1 connector (23-pin) CRD binding post connector Ground pins (2) d. Rear Panel (fig. 2-4). “Provides co
46、nnection from the receiver-transmitter rf output to tho test unit wattmeter. Provides electrical connection to the test unit from 27.voltlt dc powc,I supply. Provides electrical connection to test unit from 1 lb-vo!t, 3 phaw. 400-cps ac power supply. Provides electrical connection from varoLM antenn
47、a couplers to the receiver-transmitter throuh the test unit. P1.ovi(l(,s cli,ctrica col:ectin! flll) th(, /:t ulli If vattmctcr outl:l( t, 500 RF LOAD connector on the top panel, or Dummy Load DA - 340/ARC-102. Provides electrical connection from the If output of the recelvl transmitter, through the
48、 test unit directional wattmeter, to th( 50-ohm resistive load. Selects operation with or without antenna couplers. .Su, /ch fmtifion4ctfon UY IASSPermits operation without antenna coiplers. NORMALPermits operation with antenna couplers. Powerlinc fuses for 115 volts input, phases 1, 2, and 3. Power
49、line fuse for 28-volt dc input. Not used. Provides electrical connection to circuit ground. Provide electrical connections to circuit m-ound. 115 V, 400 CPS OUT outletProvides 115-volt, 400-cPs ac convenience output for use with Test Set, Radio TS-1956/URC which is part of Maintenance Kit, Electronic Equipment MK-722/URC. DUMMY ANTENNA INPUT jack (Banana plug) Provides electrical connection from antenna -coupler to resistive- capacitive dummy load. Primarily used with 180L series antenna couplers. Ground (telephone jack)Provides electrical connection to circuit ground. 15
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