TM 55-1510-215-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
DURING CRUISE (CONT)
b.
OFF/VOL control (ADF control) - Turn
clockwise, out of the OFF position.
c.
Frequency - Select operating frequency
(or channel) of an LF station of known
bearing.
d.
PUSH MODE switch - Press to select
ADF or ADF BFO as required.
e.
Volume control - Adjust as
K23,K25
required.
f.
Pilot's HSI and/or either RMI-
K21,K22,
Set to display ADF bearing.
K24
Bearing pointer should indicate correct
bearing to station.
g.
When possible select at least two different
operating frequencies to verify ADF
opera- tion in the low, middle and high
portions of the frequency range.
*21. VHF Navigation set (KNR 634) - Check as
follows:
a.
NAV A switch (audio control panel) - ON.
b.
OFF/VOL control - Rotate clockwise out
of the OFF position.
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