TM 11-5895-846-14
b.
Removal and Replacement of IF Patch Panel.
the rear of unit being replaced.
(A2).
(4) Loosen and rotate captive retaining tabs
securing unit to main housing and slide unit outward until
(1) Remove all external cabling from front
clear of housing.
panel.
(5) Reinstall unit following steps (1) through
(2) Loosen all captive screws securing front
(4) above in reverse order.
panel to rack and pull on the two front panel handles to
e. Removal and Replacement of Spectrum
extend the drawer to its maximum open position (as
Analyzer A7 (HP-141T).
allowed by the opening stops on the drawer slide
(1) Turn the power switch to the OFF
assembly).
position.
(3) Disconnect all associated cabling from
(2) Remove all external cables from front
connectors on rear chassis panel.
panel.
(4) Depress slide stop tabs and slide unit
(3) Loosen all captive screws securing front
outward until clear of slide tracks.
panel to rack and pull on front panel handles to extend
(5) Reinstall unit following steps (1) through
the drawer to its maximum open position (as allowed by
(4) above in reverse order.
c. Removal and Replacement of Modem A3 and
the opening stops on the drawer slide assembly).
A6 (MD-1002).
CAUTION
(1) Turn RACK 5 power switch on power
Because of unit weight and contents two
distribution panel OFF.
persons are required for removal
(2) Turn the POWER switch to the OFF
purposes. Extra precautions should be
position.
observed when handling, so as not to
(3) Loosen all captive screws securing front
damage CRT in main frame assembly.
panel to rack and pull on the two front panel handles to
(4) Remove power cord from its connector at
extend the drawer to its maximum open position (as
rear of unit.
allowed by the opening stops on the drawer slide
(5) Depress slide stop buttons and carefully
assembly).
slide unit outward until clear of slide tracks.
CAUTION
(6) Reinstall unit following steps (1) through
Because of unit weight, two persons are
(5) above in reverse order.
required for removal purposes.
f.
Removal and Replacement of Digital Test Set
(4) Remove all cabling from connectors on
A9 (TS-3642).
the rear of unit.
(1) Turn the power switch to the off position.
NOTE
(2) Remove all external cables from front
Disengage two cable harness support
panel.
clamps from modem.
(3) Loosen all captive screws' securing front
panel to rack and pull on the two front panel handles to
(5) Disconnect two ground wires (ring-type
extend the drawer to its maximum open positon (as
connections) from ground studs located on rear of
allowed by the opening stops on the drawer slide
chassis.
assembly).
(6) Depress slide stop buttons and carefully
slide unit outward until clear of slide tracks.
CAUTION
(7) Reinstall unit following steps (1) through
Because of unit weight, two persons are
(5) above in the reversed order.
required for removal purposes.
d. Removal and Replacement of Encoder-
(4) Remove power cable from rear of unit.
Decoder A4 and A5 (KY-801).
(5) Depress slide stop buttons, and carefully
(1) Turn RACK 5 power switch on power
slide unit outward until clear of slide tracks.
distribution panel to OFF and turn the power switch on
(6) Reinstall unit following steps (1) through
unit to the off position.
(5) above in reverse order.
NOTE
g. Removal and Replacement of Orderwire Shelf,
Both units (A4 and A5) are located in the
A10.
same housing assembly and may be
(1) AC power to this shelf may be turned off
by pulling out power plug after gaining access (located
replaced as a pair or independently as
on rear of shelf).
required.
(2) Remove module retention bar from front
(2) Loosen all captive screws securing front
assembly.
panel of the main housing assembly of the rack and pull
(3) Loosen all captive screws securing front
on the two main housing handles to extend the drawer to
of shelf to rack and pull edge of shelf carefully outward
its maximum open position (as allowed by the opening
nearly all the way.
stops on the housing slide assembly).
(3) Remove all cabling from connectors on
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