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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.