NAVELEX EE 181-AA-OMI-100/E121 DZ-204
Section III. GENERAL MAINTENANCE.
5-4. MAINTENANCE ACTION. The extent of
direct and general support maintenance is
governed by the Maintenance Allocation Chart
(MAC), Appendix B. The MAC authorizes on-
site test and replacement of the electronics
assembly, fuse holder assembly, speaker,
audible output transformer, power switch,
tamper switches, power transformer, battery,
capacitors, and connectors. The MAC also
authorizes inspection and replacement of the
fuse holder assembly, battery, and connectors.
Periodic testing of the Audible Alarm is not
scheduled because the J-SIIDS is maintained
in continuous operation. Cleaning the exterior
of equipment cabinets is required periodically
to maintain equipment free of debris. Maintain
louvers in cabinet door and holes in face plate
in an open and free condition.
Section IV. REMOVAL AND REPLACEMENT OF MAJOR COMPONENTS AND ASSEMBLIES
Before removing any components turn
off power switch S1. After replacement
of components, turn on power switch
a. To remove the electronics assembly,
loosen collar on connector P2. Turn
metal tab 90 degrees and disconnect P2
from J2. Tag and disconnect wires that
run from terminal boards to conduit.
Slide inner enclosure out of outer
enclosure. Place inner enclosure on
bench. Remove screws, lock washers
and washers, and disconnect connector
J2 from P1. Remove electronics
assembly mounting screws from rear of
b. To install, position new electronics
assembly on inner enclosure. Install
mounting screws through rear of inner
enclosure. Connect J1 to P1 and install
screws, lock washers and washers.
enclosure. Route wires through hole in
rear of inner enclosure.
wires running from terminal boards to
conduits. Align notch on P2 with J2 and
connect P2 to J2. Lock metal tabs
together and tighten collar on connector
c. To remove speaker, loosen collar on
connector P2. Turn metal tab 90
degrees and disconnect P2 from J2.
Tag and disconnect wires that run from
terminal boards to conduit. Slide inner
enclosure out of outer enclosure. Place
inner enclosure on bench. Note length
Disconnect wires from terminal board.
Remove mounting screws from rear of
enclosure and remove speaker.
d. To install new speaker, cut speaker
wires to same length as wires on old
speaker. Trim insulation from 1/8 inch
(3.175 mm) of end of wires and install
crimp lugs. Insert mounting screws from
rear of enclosure and tighten to secure.
Connect wires to terminal boards.
e. To remove audio output transformer,
note length and location of transformer
wires. Disconnect wires. Remove
mounting screws and lock washers, and