Section IV. REMOVAL AND REPLACEMENT OF MAJOR COMPONENTS AND ASSEMBLIES

TM 5-6350-264-14&P-9 NAVELEX EE 181-AA-OMI-100/E121 DZ-204 T.O. 31S9-2FSS9-1-9 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 WARNING Before removing any components turn off power switch S1. After replacement of components, turn on power switch S1. 5-5. REMOVAL AND INSTALLATION PROCEDURES. 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 inner enclosure. 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. Slide inner enclosure into outer enclosure. Route wires through hole in rear of inner enclosure. Connect 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 P2. 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 and location of speaker wires. 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 remove transformer. 5-28