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Section III. GENERAL MAINTENANCE - TM-5-6350-264-14-P-30036
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TM-5-6350-264-14-P-3 Receiver Passive Signal Ultrasonic R-1860/FSS-9(V) Processor Passive Signal Ultrasonic TMX-9442/FSS-9(V) Manual
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Appendix A. REFERENCES - TM-5-6350-264-14-P-30039
TM 5-6350-264-14&P-3
NAVELEX EE 181-AA-OMI-040/E121 R1860 M9443
TO 31S9-2FSS9-1-3
Section IV. REMOVAL AND REPLACEMENT OF MAJOR COMPONENTS AND ASSEMBLIES
e.
After
replacement
of  major
5-5. REMOVAL AND INSTALLATION
components or assemblies, test the
PROCEDURES.
PUS for proper operation. Ensure that
the keyoperated switch on the Control
a. To remove the Processor PC board, remove
Unit is in the access position. Remove
screws holding the cover. Remove the cover.
the Processor housing cover and pull
Tag and remove the leads from TB1 and TB2.
the TAS plunger all the way out. Set the
Remove screws holding the PC board in the
multimeter to dc volts and connect the
housing. Remove the PC board.
positive lead to TP MV and the negative
lead to TB1-8.
The meter should
indicate zero volts. Use a key ring with
b. To replace the processor PC board, orient the
four to5-19/(5-20 blank) six brass keys
board so that terminal strips TB1 and TB2 are
on it.  Rattle the keys in front of the
adjacent to the conduit connections. Secure the
Receiver.  The meter should deflect.
PC board to the housing with screws. Attach the
Disconnect wire from TB1-6.  Set the
leads to TB1 and TB2. Calibrate the PUS in
multimeter to ohms and connect the
accordance with steps in TM 5-6350264-14/1.
leads to TB1-6 and 2. With the Receiver
Replace the cover and secure it with screws.
housing cover closed, the meter should
indicate less than 2,000 ohms. Slowly
c. To remove the Receiver PC board, remove
open the cover.
Before the cover
screws holding the cover. Remove the cover.
flanges clear the edge of the housing,
Tag and remove the leads from TB1. Remove
the meter indication should change to
screws holding the PC board in the housing.
over 100,000 ohms. Remove the cover
Remove the PC board.
and pull the TAS plunger all the way out.
The meter indication should drop to its
d To replace the Receiver PC board, orient the
former level.
Secure the Receiver
board so that terminal strip TB1 is adjacent to
housing cover.
Depress the TAS
the conduit connections. Secure the PC board
plunger in the Processor.  The meter
to the housing with screws. Attach the wires to
should indicate less than 2,000 ohms.
TB1 Calibrate the PUS in accordance with
Slowly release the plunger. After about
steps in TM5-6350-264-14/1Replace the cover
1/4 inch (0.635 cm) of movement the
and secure it with screws.
meter indication should change to over
100,000 ohms.
Remove the meter
leads, reconnect the wire to TB1-6, and
secure the Processor housing cover.
5-19/(5-20 blank)

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