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 TM 55-1905-219-14-7
3-216. HEADING SELECTOR - MAINTENANCE INSTRUCTIONS (Continued).
LOCATION
ITEM
ACTION
REMARKS
ALIGNMENT
8. Heading
After any repair has been made to
Selector
the heading selector, perform the
initial check-out procedure. The
actual heading may be slightly
different from the ordered heading
when the rudder is at amidships.
This difference can be eliminated
by aligning the heading selector
synchro as follows:
a. Remove the heading selector
from the enclosure.
b. Start the gyrocompass
and wait for it to settle.
c.
Energize the steering
equipment and position
the rudder to amidships.
Place the control equip-
ment in the gyrocompass
mode.
d. Set and hold the ordered
heading to the actual
heading and measure the
A-C voltage between
circuit card terminals
6 and 7.
3-3326
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