TM11-5895-846-14
c.
(d) Replace the cover and close the drawer.
Pull on the two handles and extend the drawer
to its maximum extension.
(12) lose and secure the drawer.
d.
c.
Removal and replacement of module A7.
Remove each of the cable connectors on the
(1) Place POWER AC switch in the OFF position.
rear of the drawer.
e.
Press the slide releases on each slide and
(2) Loosen the four captive screws holding the
drawer to the rack.
carefully remove the drawer from the slides.
f. Replace the drawer by extending the slides from the
(3) Pull on the two handles and extend the drawer
to its maximum extension.
rack, placing the drawer on the slides and pushing
(4) Loosen the 26 quarter-turn screws which
inward until the releases snap in place. Replace the
secure the cover to the drawer.
cables, close the drawer and secure it with the four
(5) Remove the cover.
captive screws.
CAUTION
5-15.
Removal and Replacement of Modules
a.
Removal and Replacement of Modules Al
This module is heavy, has some sharp
through A6.
corners and is closely fitted into the drawer.
(1) Place POWER AC switch in the OFF position.
Avoid cuts or damage to parts when
(2) Loosen the four captive screws holding the
removing it.
drawer to the rack.
(6) Disconnect the power cable at the rear of the
(3) Pull on the two handles and extend the drawer
drawer.
to its maximum extension.
(7) At both TB1 and TB2 loosen the six screws
(4) Loosen the 26 quarter-turn screws which
which secure the wires to the terminal boards.
secure the cover to the drawer.
(8) Remove the cable clamp adjacent to each
(5) Remove the cover.
terminal board.
(9) Loosen the six Phillips captive screws which
(7) Pull up on the extractor levers at each end of
secure the base of the module to the chassis.
the module until the module is clear of its connector.
(10) Carefully lift the module from the drawer.
Lift the module out of the drawer.
(11) Replace the module by the following:
(8) To replace the module, place it in the guides
(a) Carefully lower the module into place
on each side and push down firmly until the module is
within the drawer.
properly seated in its connector.
(b) Tighten the six Phillips screws to secure
b.
Removal and Replacement of Modules A8 and
the module to the chassis.
A9.
(c) Replace the cable clamps which are
(1) Place POWER AC switch in the OFF position.
adjacent to each terminal board.
(2) Loosen the four captive screws holding the
(d) Place the wire lugs in place on TB1 AND
drawer to the rack.
TB2.
(3) Pull on the two handles and extend the drawer
(e) Tighten the six screws on each terminal
to its maximum extension.
board.
(4) Loosen the 26 quarter-turn screws which
(f) Replace the cover.
secure the cover to the drawer.
(g) Replace the power connector on the rear
(5) Remove the cover.
of the drawer. Close and secure the drawer.
(d)
Removal and Replacement of Module A12.
(7) Loosen the two captive screws and remove the
(1) Place AC POWER switch in the OFF position.
connector at J1.
(2) Loosen the four captive screws holding the
(8) Loosen the screws on TB1 and remove the
drawer to the rack.
wires connected to the terminal board.
(3) Pull on the two handles and extend the drawer
(9) Loosen the four Phillips screws which secure
to its maximum extension.
the module to the chassis.
(4) Loosen the 26 quarter-turn screws which
(10)Carefully lift the module from the drawer taking
secure the cover to the drawer and remove the cover.
care not to damage wires or components.
(5) In the module, remove the coaxial cable from
(11) To replace the module place it in position in the
the 70 MHz in connector J2.
drawer.
(6) On the right side of the module, loosen the two
(a) Tighten the four Phillips screws.
captive screws which secure the power connector and
(b) Replace the wires on TB1.
remove the connector.
(c) Replace the connector at J1 and tighten
(7) Loosen the three captive screws which secure
the captive screws.
the module to the chassis and remove the module.
5-8