TM 5-6350-264-14&P-4
NAVELEX EE 181-AA-OMI-050/E121 DT546 M9442
TO 31S9-2FSS9-1-4
Table 5-1. Troubleshooting Procedures - Continued
Trouble
Probable cause
Corrective action
2. (cont)
b. (cont)
e.
If the meter indicates any resistance,
check terminal strip and PC board
for damaged contacts. Ensure that
all terminal connections, screws,
and conduit lock nuts are tight.
f.
If there is any damage to terminal
strip or PC board, replace PC board.
(1) To remove Detector PC board, tag
and disconnect wires from TB1.
Disconnect red and black pick-up
assembly wires from PC board.
Remove screws that secure board
to chassis. Remove PC board.
(2) To install new Detector PC board,
orient board so the terminal strip is
adjacent to the conduit entrance
hole. Secure the board to the
chassis with screws.
Connect
wires to TB1, and connect red and
black pick-up assembly leads to
the marked terminals on the board.
Adjust gain control per instructions
in TM 5-6350-264-14/1.
a.
Inspect all chassis covers to ensure
that they are flat, straight, and tight.
c.
Bad tamper alarm
Make sure there is no debris
switch or chassis
between
chassis
and
cover.
cover.
Replace any unserviceable covers.
b.
Disconnect wire from TB1-2 in the
Processor, and pull TAS plunger all
the way out.
Set multimeter to
ohms, and connect leads to TB1-5
and TB1-6. Meter should indicate
2,000 ohms or less.
c.
Remove the cover on the first
Detector. The meter should indicate
over 100,000 ohms. Pull the TAS
plunger all the way out. The meter
indication should drop to its original
level.
Install the cover.
While
watching the meter indication for
5-7