Quantcast Table 5-1. Troubleshooting Procedures - Continued - TM-5-6350-264-14-P-40029

 

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Table 5-1. Troubleshooting Procedures - Continued - TM-5-6350-264-14-P-40028
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TM-5-6350-264-14-P-4 Detector Vibration Signal DT-546/FSS-9(V) NSN
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Table 5-1. Troubleshooting Procedures - Continued - TM-5-6350-264-14-P-40030
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
3. (cont)
e. (cont)
c.
If the meter does not sweep between 0
and approximately 2,500 ohms or if the
needle moves in a jerky or erratic
manner, replace the PC board.
(1) To remove Processor PC board, tag and
disconnect wires from TB1 and TB2.
Remove screws that secure PC board to
chassis. Lift PC board out of chassis.
(2)
To install new PC board, orient board
so the terminal strips are adjacent to
conduit entrance holes.  Secure the
PC board to chassis with screws.
Connect wires to TB1 and TB2. Adjust
sensitivity control per instructions in
TM 5-6350-264-14/1.
a.
If PC board is good, check pick-up
assembly in Detector.  Disconnect red
f. Bad Detector pick-
and black leads from PC board.  Set
up assembly
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.
5-14

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