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Page Title:
Removal and Replacement of First If. Amplifier Subunit |
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|  the handle to pull the plug straight
(2) Seat the subunit on the main chas-
out .
sis and align the captive screws
(4) Loosen the two captive screws (2)
with the holes.
(3) Tighten the three captive screws
at the front end of the subunit, and
(3) (right-side view).
the single captive screw (2) at the
rear (top view).
(4) Connect plugs P301, P302, P303,
(5) Lift up to remove the subunit.
and P304 (right-side view).
(5) Connect plugs P6 and P7 and slide
b. Replacement.
the cables under the clip (right-
(1) Align the slot on the subunit coupler
side view).
vertically with the guide pin in the
upper right corner, to mesh with
the coupler on the frequency selec-
tor.
to 3.9-Mc If. Subunit
(2) Hold plug P201 clear and seat the
subunit on the main frame so that
a. Removal
the captive screws are aligned with
(1) Set the rt unit on its left side on the
the holes.
bench.
(3) Tighten the three captive screws
(2) Disconnect plugs P5, P304, and
(2) (top view).
P401 (right-side view).
(4) Connect plug P4 (top view) and plug
(3) Loosen two captive screws (4) at
P201 (left-side view).
the front of the subunit and one cap-
tive screw at the rear (right-side
view).
(4) Lift the subunit up to remove it.
If. Amplifier Subunit
b. Replacement.
(1) Align the slot on the subunit coupler
a. Removal.
vertically, with the guide pin in the
(1) Set the rt unit on its left side on the
upper right quadrant when the sub-
bench.
unit is viewed from the front, to
(2) Disconnect plugs P302 and P303
mesh with the frequency selector
(right-side view).
coupler.
(3) Disconnect plug P304 (right-side
(2) Seat the subunit on the chassis so
view).
that the captive screws are aligned
(4) Disconnect plug P301 (right-side
with the holes.
view).
(3) Tighten the three captive screws
(5) For convenience, disconnect plugs
(4) (right-side view).
P6 and P7, and slide the cables out
(4) Connect plugs P5, P304, and P401
from under the clip (right-side
(right-side view).
view).
(6) Loosen the two captive screws (3)
at the front of the subunit, and the
single captive screw (3) at the rear
If. Amplifier Subunit
(right-side view).
(7) Lift the subunit up to remove it.
a. Removal
b. Replacement.
(1) Set the rt unit bottom side up on the
(1) Align the slots on the subunit cou-
bench.
plers vertically, with the guide pins
(2) Disconnect plugs P8 and P501 (bot-
in the upper right quadrant when
tom view).
the subunit is viewed from the
(3) Loosen the four captive screws (5)
front, to mesh with the frequency
(bottom view).
selector couplers.
(4) Lift the subunit up to remove it.
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