Table 5-1. Troubleshooting Procedures - TM-5-6350-264-14-P-50018

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

NAVELEX EE 181-AA-OMI-060/E121 SA-1955

T.O. 31S9-2FSS9-1-5

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 PC board in Magnetic

a. With door or window closed, dis-

Switch Assembly.

connect wires from TB1-1 and

TB1-2. Set multimeter to ohms

and connect leads to TB1-1 and

TB1-2. Meter should indicate

less than 50 ohms.

b. If the meter indicates over 100,000

ohms across TB1-1 and TB1-2

with door or window closed,

adjust the bias magnet inside

the Magnetic Switch Assembly.

c. To adjust the bias magnet, loosen

the two screws that secure it to

the PC board, and slide it back

and forth.

d. If the meter indication does not

change to less than 50 ohms or

if the operation appears to be

erratic, replace the PC board.

e. To remove the PC board, tag and

disconnect the wires from TBl.

Remove two screws that secure

the bias magnet and two screws

that secure PC board to the hous-

ing. Remove the PC board.

f. To install new PC board, orient the

board so that the terminal strip is

on the side away from the

5-3