Section III. GENERAL MAINTENANCE - TM-5-6350-264-14-P-80017

TM 5-6350-264-14&P-8

NAVELEX EE181-AA-OMI-090/E121 SA-1954

T.O. 31S9-2FSS9-1-8

Section III. GENERAL MAINTENANCE

5-4. MAINTENANCE ACTION. The extent of direct and

emitting diode, and PC board. On-site inspection and

general support maintenance is governed by the

replacement are provided for the cover and cover

Maintenance Allocation Chart (MAC), Appendix B. The

gasket. Periodic testing of the Latching Alarm Switch is

MAC provides for on-site test and replacement of the

not scheduled because the J-SIIDS is maintained in

switch assemblies, light-

continuos operation.

Section IV. REMOVAL AND REPLACEMENT OF MAJOR COMPONENTS AND ASSEMBLIES

5-5. REMOVAL AND INSTALLATION PROCEDURES.

Remove gasket from cover. Scrape off any bits of

a. To remove LED, tag and carefully unsolder wires

gasket that adhere to cover.

from PC board. Use a soldering iron of 50 watts

maximum.

h. To install a new gasket, orient it so the holes in the

gasket are aligned with the holes in the cover. Apply

b. To replace LED, turn flat spot on side of LED toward

adhesive and press the gasket into place. Orient the

2 on PC board. Carefully solder wires to PC board,

cover so that the guard at one end of cover is over

using soldering iron of 50 watts maximum.

the duress alarm switch and the screw holes in the

cover are aligned with the screw holes in the

Remove the PC board and relay. Remove screws

chassis. Insert the screws and tighten them to

that secure the PC board to the relay bracket. Tag

secure cover.

the wires, and use a soldering iron of 50 watts

maximum to remove them from the PC board

After replacement of major components or

terminals.

assemblies during troubleshooting, test the LAS for

proper operation. Ensure that the key-operated

d. To install new PC board, use soldering iron of 50

switch on the Control Unit is in the access position.

watts maximum and solder wires to the terminals;

Remove the chassis cover, and disconnect wire

secure relay bracket to the PC board.

from TB1-2. Set multimeter to ohms and connect

leads to TB1-1 and TB1-2. Meter should indicate

e. To remove cover, remove screws that secure it to

2000 ohms or less. Operate duress alarm switch

chassis, and lift it off the chassis.

(S1). Meter indication should change to over

100,000 ohms, and the alarm indicator light should

To install new cover, orient it so that the guard at

come on. Depress the reset switch (S2). The meter

one end is over the duress alarm switch and the

indication should change to less than 2000 ohms,

screw holes in the cover are aligned with the screw

and the indicator light should go out. Connect meter

holes in the chassis. Insert the screws and tighten

leads to TB1-5 and TB1-6, and depress TAS (S3).

them to secure cover.

Meter should indicate less than 2000 ohms. Slowly

release TAS plunger. When the switch plunger

g. To remove gasket, remove screws that secure

moves inch (0.635 cm) or less, the meter

cover to chassis, and lift cover off chassis.

indication should change to over 100,000 ohms.

Disconnect the meter leads from TB1-5 and TB1-6,

connect the wire to TB1-2, and install the cover.

5-3