TM 55-1510-219-MTF
PROCEDURE TROUBLESHOOTING REFERENCE
rotate 180° and again indicate the magnetic bearing to
station.
p.
Distance range (ADF) - Check as follows:
(1)
Mode selector switch - ADF.
(2)
Tune control - Tune stations to determine operating
range of direction finder. End of effective operating
range may be considered to be reached when the RMI
bearing needle fails to return to within three degrees of
starting bearing when loop is slewed first clockwise and
then counterclockwise.
* 11.
Marker beacon/glideslope receiver
K14-19
- Check as follows:
a.
Marker beacon volume control (pedestal extension) - Rotate
rotate full clockwise.
b.
NAV A control (pilot's audio control panel) - Push on and
turn clockwise to adjust volume. Clear audio signals should
be available.
c.
Marker beacon sensitivity switch (pedestal extension) - As
required.
d.
Frequency selectors (VOR control panel) - Select localizer
frequency.
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