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Page Title:
Table 5-1. Troubleshooting Procedures - Continued |
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 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
1. (cont)
b. (cont)
holes. Secure the PC board to
chassis with screws.
Connect
wires to TB1 and TB2. Adjust
sensitivity control per instructions
c. Bad Detector pick-up
in TM 5-6350-264-14/1.
assembly.
a.
If PC board is good, check pick-up
assembly in Detector. Disconnect
red and black leads from PC
board. Set multimeter to ohms
(highest scale), and connect meter
leads to red and black leads.
Meter should indicate over 10,
000, 000 ohms.
b.
If this indication is not present,
replace pick-up assembly.
(1) To remove pick-up assembly,
disconnect red and black leads from
PC board.
Remove screws that
secure assembly to mounting
surface, and remove assembly.
(2) To install new pick-up assembly,
orient assembly so that red and
black leads are toward PC board.
Tilt assembly so that edge nearest
PC board can be slipped under PC
board. Insert assembly into chassis,
flat against mounting surface, and
secure it with screws. Connect red
and black leads to PC board.
a.
Inspect all chassis covers to
d. Bad tamper alarm
ensure that they are flat, straight,
switch.
and tight. Make sure there is no
debris between chassis and cover.
b. Disconnect wire from TB1-2, 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.
Slowly open the cover on the first
Detector. While the cover flanges
are still engaged, the meter
5-4
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