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Page Title:
Removal and Replacement of Audio Amplifier and Modulator Subunit |
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|  b. Replacement.
the bottom of the subunit clears the
(1) Seat the subunit on the chassis so
blower hose.
that the captive screws are aligned
(4) Grasp the subunit handle and pull
with the holes.
the subunit out of the main frame.
(2) Tighten the four captive screws
b. Replacement.
(5) (bottom view).
(1) Push the blower hose downward and
(3) Connect plugs P8 and P501 (bottom
slide the subunit into the chassis.
view).
(2) Replace the two roundhead screws
(4) Dress the cable to plug P501 close
(6) and lockwashers and tighten
to the chassis.
them (bottom view).
(3) Be sure that the blower hose is
properly connected between the
blower outlet and the air duct to the
Amplifier and Modulator Subunit
rf and power amplifier subunit.
a. Removal.
(1) Set the rt unit on its right side on
the bench.
DY-151/U (AN/VRC-24 Only)
(2) Disconnect plug P801 by placing a
screwdriver under both handles
a. Removal.
and pulling straight up (left-side
(1) Remove the audio amplifier and
view).
modulator subunit (para 112) be-
(3) Loosen one captive screw (7) at the
fore removing the dynamotor.
front end of the subunit, one captive
(2) Set the rt unit on its right side on
screw (7) adjacent to P801, one
the bench.
captive screw (7) slightly to the
(3) Disconnect plug P1001 (left-side
rear of center of the subunit, and
view).
two captive screws at the rear of
(4) R e m o v e two hexagonal-head
the subunit (7) (left-side view).
screws (8) from the left side of the
(4) Lift the subunit up to remove it.
rt unit (left-side view).
b. Replacement
(5) Remove the two remaining hexag-
(1) Seat the subunit on the chassis,
onal-head screws (8) on the bottom
rear end first, and align the cap-
of the chassis (bottom view).
tive screws with the holes.
(6) Lift the dynamotor off the chassis.
(2) Tighten the five captive screws (7)
The blower hose can be slid off the
(left-side view).
air duct if necessary.
(3) Connect plug P801 (left-side view).
b. Replacement.
(1) Replace the blower hose on the air
duct .
Subunit
(2) Insert the blower outlet into the
blower hose as the dynamotor is
seated on the chassis. Align the
a. Removal.
hexagonal-head screws (8) with the
(1) Set the rt unit top side up on the
holes.
bench.
(3) Tighten the two hexagonal-head
(2) Remove the two green roundhead
screws (8) on the left side (left-
screws (6) and the lockwashers at
side view), and the two hexagonal-
the rear of the main frame, which
head screws (8) on the bottom (bot-
fasten the relay subunit to the chas-
tom view) of the main frame.
sis (bottom view).
(4) Correct plug P1001 (left-side
(3) Slip a screwdriver between the
subunit and the blower hose so that
view).
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