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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
2. (cont)
c. (cont)
fluctuations, tap the cover. If the meter
fluctuates, remove the cover. Place a
straightedge across the chassis to
depress the TAS. The meter should
indicate less than 2,000 ohms. Slowly
raise the straightedge.
After a
movement of less than 1/4 inch (0.635
cm), the meter indication should change
to over 100,000 ohms. If the TAS
checks good, replace the cover. If the
TAS checks bad, replace the PC board.
Repeat these tests on each Detector.
(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.
d.
Use a straightedge across the Processor
chassis to hold the TAS plunger down.
Slowly raise the straightedge. After a
movement of less than inch (0.635
cm), the meter indication should change
to over 100, 000 ohms.
e.
If these indications are not correct,
replace the Processor PC board.
(1)
To remove Processor PC board, tag
and disconnect wires from TB1 and
TB2. Remove screws
5-8
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