Quantcast Table 5-1. Troubleshooting Procedures-Continued - TM-5-6350-264-14-P-50019

 

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Table 5-1. Troubleshooting Procedures - TM-5-6350-264-14-P-50018
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TM-5-6350-264-14-P-5 Switch Balanced Magnetic SA-1955( ) / FSS-9 (V) NSN
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Table 5-1. Troubleshooting Procedures-Continued - TM-5-6350-264-14-P-50020
TM 5-6350-264-14&P-5
NAVELEX EE 181-AA-OMI-060/E121 SA-1955
T.O. 31S9-2FSS9-1-5
Table 5-1. Troubleshooting Procedures-Continued
Trouble
Probable cause
Corrective action
1. (cont.)
a. (cont.)
Activating Magnet. Secure the
board to the housing with two
screws. Put the bias magnet in
place, and start the two screws
that secure it; but leave these
screws loose so the bias magnet
can be calibrated. Connect the
wires to TBl.
-
b. Bias magnet out of calibra
a. If the wiring is good and the meter
tion.
indication drops to less than 50
ohms when the bias magnet is
moved, calibrate the bias magnet.
b. To calibrate the bias magnet, set
the meter to ohms and connect
the leads to TB1-1 and TB1-2.
Loosen the two screws that
secure the bias magnet to the PC
board. Close the door or win-
dow. Slide the bias magnet
back and forth until the meter
indicates less than 50 ohms.
c. Open the door or window 1/2 inch
(1.27 cm). The meter should
indicate less than 50 ohms.
d. If the meter indicates more than 50
ohms, reposition the bias magnet
until the meter does indicate less
than 50 ohms.
e. Open the door or window 1 1/4
inch (3.175 cm). The meter
should indicate over 100,000
ohms.
f. Repeat these steps until the meter
indicates less than 50 ohms with
the door or window open 1/2
inch (1.27 cm) or less, and indi-
cates over 100,000 ohms when
the door or window is opened
more than 1 1/4 inch (3.175cm).
5-4

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