Table 5-1. Troubleshooting Procedures - TM-5-6350-264-14-P-80018

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

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

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

NOTE

Troubleshooting procedures listed in table 5-1 may require more than one person to

perform corrective action.

Covers should be removed as necessary to perform troubleshooting procedures.

Never disconnect a wire without first marking that wire to assure proper reconnection.

Table 5-1. Troubleshooting Procedures

Trouble

Probable cause

Corrective action

1. Constant alarm.

a. Bad duress alarm

CAUTION

switch

When power is on, do not short

test points to chassis or other

test points, or damage may re-

suit.

NOTE

Before troubleshooting the LAS, remove all

components from chas- sis as follows: Tag

and disconnect wires

TB1-1, TB1- and TB1-7. Remove the nut

and lock washer from switch S1, and push

the switch into the chassis. Remove

component

mounting

plate

screws.

Remove plate and all components from

chassis. Connect patch cable be- tween

wire removed from TB1-7 and terminal

TB1-7. Connect patch cable between wire

re- moved from TB1-8 and terminal TB1-8.

Remove screws securing PC board

assembly. Remove screws securing reset

switch (S2). Move these two parts aside to

provide working space.

a. Set multimeter to ohms and connect leads to

TB1-1 and TB1-2. Meter should indicate 0

ohms. Operate duress alarm switch (S1).

Meter should indicate infinity or open

circuit.