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Me TNTENANCE NAVSHIPS 9rO47 Section 3 Porogroph I SECTION 3 MAINTENANCE WARNING Voltages sufficient to cause are present in the equipment. all power is secured before the cabinets. injury or death Make sure that working inside trn t l . i"'1";''.ATOR'S MANTENANCE. NOTICE TO OPERATORS Operators shall not perform emergency maintenance procedures except upon specific authorization from proper authority. L(. CLEANING.-The operator is responsible that the Signal Distribution Unit is kept shipshape. The e--*erior should be dusted off daily and any damaged p*.^^rt touched up with grey paint N"ty Specification #5281. Vr" a dty cloth or foxtail, but do not use a damp cloth uffi;s all circuits are secured. DON'T MAKE YOURSELF A GROUNDING LUG! If the equipment "'is b#'fired for sufficiently long periods, clean out the interior with a vacuum device or foxtail. Brtrsn qft_pa''i , terminal board*.f J trre and door. Cheffia sf,."r*i tightness. n, or dis- Inspe. t ffi$ loo con- 1: ^'J !l'o-Lln(',"g leads. But if the power cannot be sr .'€(' ket'p cornpletely outside of the cabinet. Tt Just m '-- blown out with compressed air if due ,:,:rsed that contact with conductors is b. FUSES.-The operator must replace fuses when the occasion arises. The onlv ftrses in the equipment, except tho rhe electrrnic components which are Governrr, rt f-,. ;lied, are in the primary power distribtrti';n panel S;r-19+/G (see figure 3-t). If a fuse blorvs th; most probable cause is excessive starting cur ' ;nt caused by several electronic components beittg startsfl at onc Turn off all components connected to the .;onveni' rcL strip and outlets and install a new fr )" Turr :,i) the components one by one. If the fr '' blou, t , ;-dirr, rt will be easy to tell which com- 1r, orent is ,,'lrrg the ov'erload. C lIGINA: RESTRICTED WARNING Never replace a ftrse with orle of hlgher rating unless continued operation of the equipment is more important than probable damage. If a fuse burns out immediately after replacement, do not replace it a second time until the cause has been corrected. c. VENTILATION.-The cabinets are equipped with adjustable louvers on the top and the rear door which regulate the circulation of air. In cold climates, the openings should be decreased to prevent slow warm-up of the electronic components. In warm climates, the louvers should be opened to prevent overheating. The airscreens over the louvers must be kept free from dust which would restrict circulation of air. 2. PREVENTIVE MAINTENANCE. Preventive maintenance is a systematic series of operations performed at regular intervals on equipment to eliminate unnecessary interruptions in service, and to keep the equipment operatitrg at top efficiency. The function of preventive maintenance is to locate and repair minor malfunctions, thereby eliminating extensive repairs which might interrupt communication at some vital time. The entire system of radio communication demands that each receiver be operating efficiently when needed. Since the Signal Distribution Unit is a vital part of the communication system, the importance of preventive maintenance cannot be over-emphasized. NOTE THE ATTENTION OF MAINTENANCE PERSONNEL IS INVITED TO THE RE- QUIREMENTS OF CHAPTER 67 OF THE BLTREAU OF SHIPS MANUAL. OF THE LATEST ISSUE.
3 Section Porogroph 2 Gl cL. INSPECTION.-Inspection is the most important operation in the preventive maintenance program. Inspection consists of carefully observing all parts of the equipment noticing color, placement, state of cleanliness, etc. Inspect for the following conditions: WARNING Be sure that the primarv power switch (see figure 3-l) is turned off to prevent injury or death before conducting the following maintenance procedures. Since the AF and RF conductors carry only very small currents, it is safe to work inside the cabinets without securing operations completely. (l) OVERHEATING.-Indicated by discoloration, blistering or bulging of the parts, leaking of insulating compounds, and oxidation of rnetal contact surfaces. Replace as necessary all parts found defective. ' NAVSHTPS 9rO47 MAINTET$AI.ICE (2) FL4... :Elvlrrr{T.-Observe that all le,.,is and cables are in their correct position, laced, a.rd secured properly. Replace and secure as necessarv. (3) CLEANLINESS.-Carefully clean all recesses in the cabinets, especially betro,'een corlnecting terminals on terrninal boards. Parts, connections, and joints should be free of Cust, corro.sion, ilnd otl',rr foreign matter. In tropical and high hurni,'Jlt1' locirtions, look for fungus growth and rnildern'. ]letr
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NAYSHIPS 9T.O47 s {t INSTRUCTTON BS
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Effective Poges NAVSHTPS 9rO47 FRON
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Correction Poge NAVSHTPS 9rO47 FRON
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Contents NAVSHIPS 91047 FRONT MATTE
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lllustrotions qnd Tobles NAVSHTPS 9
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Miscellqneous Dotq NAVSHTPS 9rO47 R
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1 Section NAVSHIPS 91047 t GENERAL
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1 Section Porogroph I d NAVSHTPS 9r
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1 Seclion Porogroph 3 q (l) compone
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1 Section Porogroph 3 q (5) NAVSHTP
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3q(7) NAVSHIPS 91047 GE \'ERAL DESC
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1 Section Porogroph 3 q (lI) NAVSHI
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1 Section Porogrcph 3 s (14) NAVSHI
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1 Section Porogroph 3 q (18) Figure
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1 Section Porogroph 4 NAVSHTPS 9rO4
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1 Section Toble l-2 NAVSHIPS 9rO47
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1 Section Tqble l-4 TABTE I.4. NAVS
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1 Section Tqble l -6 TABTE I.6. NAV
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1 Section Tqble l-7 NAVSHIPS 9rO47
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INSTAI:.A,"lOtt An\t" NAVSHIPS 9104
Page 43 and 44: lN$T'ALt ATION AND CPERA; 'N | , ,i
Page 45 and 46: :..:,., : iNSTALIAiION AND OPE:iA]
Page 47 and 48: iNSTAILATION AND NAVSHTPS 9rO47 Sec
Page 49 and 50: aNSTALId{TION AND c)FElr:r\1'1i1N N
Page 51 and 52: INSTAÎI,,f\TION AND OIIEfr ATI'.}N
Page 53 and 54: '{\t ';TJ\LI. ATION AND t )i'Eh, 'i
Page 55 and 56: I'{STALII=TIT}N AND {)PEItA'i':*)\!
Page 57 and 58: lf$5TAl I ,*r li'lf,iFtl AND ,Jii[R
Page 59 and 60: !NSTA[!.A[IONI At"lD C}PERATiEF,I N
Page 61 and 62: INs TAI,i.ATIt'f.I AND CIPERATIC.f
Page 63 and 64: INSTAIIAI I'-,$ti jti{D OPERATIGT.'
Page 65 and 66: INSTAIuATIC,N Ah{t, OPERA.IQII{ iE,
Page 67 and 68: irugrA[[A?'.]l-l A r-fD OFtftATION
Page 69 and 70: { AND NAVSHTPS 9rO47 Section 2 Figu
Page 71 and 72: LAFI'iNr{ AND noN NAVSHIPS 91047 Se
Page 73 and 74: 'iit ''fr 1 ATION AND toN NAVSHIPS
Page 75 and 76: I sTAI.I,AYICN F ND )ERAI *rf*l NAV
Page 77 and 78: INSTATTATION AND OPERATION NAVSHIPS
Page 79 and 80: D NAVSHIPS 9rO47 Section 2 Figure 2
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Page 83 and 84: .LATION AND ,TloN' NAVSHIPS 9rO47 S
Page 85 and 86: )N AND NAVSHIPS 9rO47 Section 2 Fig
Page 87 and 88: -l -l NAVSHTPS 91047 Section 2 Figu
Page 89 and 90: dl I LLATION AND \TION NAVSHIPS 9rO
Page 91: G J AIIATION AND TATION NAVSHIPS 9r
Page 96 and 97: MAINTET'IAI-ICE NAVSHIPS 9rO47 Sect
Page 98 and 99: frÂINTENANi:E rirther thun rt'pa"i
Page 100 and 101: MAINTEN"qf*tCE ( f ; If several adj
Page 103 and 104: I I I F{ F{ F{ F{ 4 Section Spore P
Page 105 and 106: ar l9 ra \v - F F 4 Section A-l ol
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