NAVELEX EE 181-AA-OMI-050/E121 DT546 M9442
Table 5-1. Troubleshooting Procedures - Continued
gain control per instructions in TM 5-
2. Nuisance alarms
e. Loose interconnecting
Ensure that all
connections are tight.
a. Stray vibration in the
Check all mounting hardware at
Detector chassis and conduit clamps to
ensure that all units are mounted rigidly.
Ensure that all mounting surfaces are
rigid and not subject to vibration by
wind, wildlife, or loose doors and
b. Loose ground
Set multimeter to ohms, and check
between TB1-9, TB2-9, chassis, and
conduit in the Processor. The meter
should indicate 0 ohms.
If the meter indicates any resistance,
check terminal strips and PC board
for damaged contacts. Ensure that all
terminal connections, screws, and
conduit lock nuts are tight.
If there is any damage to terminal
strips or PC board, replace PC board.
To remove Processor PC board, tag
and disconnect wires fromTB1 and
TB2. Remove screws that secure PC
board to the chassis. Lift PC board
out of chassis.
To install new PC board, orient the
board so the terminal strips are
adjacent to the conduit entrance
holes. Secure the PC board to the
chassis with screws. Connect wires to
TB1 and TB2.
control per instructions in TM 5-6350-
Set meter to ohms, and check
between TB1-9, chassis, and conduit
in the Detector. The meter should
indicate 0 ohms.