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Page Title:
Table 5-1. Troubleshooting Procedures-Continued |
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 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
2. (cont.)
a. (cont.)
f. To install new PC board, orient the
board so that the terminal strip is
on the side away from the Actuat-
ing 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 TB1.
b. Bias magnet out of calibration. -
a. If the wiring is good and the meter
indication changes to infinity 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 window. 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 indi-
cate 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 indi-
cate 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 indicates
over100,000 ohms when the door
or window is opened more than 1
1/4 inch (3.175 cm).
5-7
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