TM11-5895-846-14
(2) Remove cables from the following front
MHz IN and 5 MHz OUT.
panel connectors: SHF OUT, 700 MHz IF, 70 MHz IF, 5
(3) Loosen the four captive screws on the
MHz IN, and 5 MHz OUT.
front panel and open the upconverter drawer.
(3) Loosen the four captive screws on the
(4) On module PS1, remove chassis cable
front panel and open the upconverter drawer.
connector P1 from module connector J1 by loosening the
(4) Remove coaxial cable W9 from module
retaining ring and pulling out connector.
connector J3 (700 MHz input) and disconnect semiriged
(5) On the module PS1, remove chassis cable
cable W3 from the SHF filter/detector module A5 at the
connector P2 from module connector J2 by loosening the
FL1 input connector.
two captive screws and lifting out connector.
(5) Loosen semirigid cable W3 at the J4
(6) Under the upconverter chassis, remove
connector (SHF output) of the 700/SHF mixer module.
the six nuts and washers which secure the module and
(6) Loosen the four captive screws which
remove the module from the chassis.
secure the module to the chassis and lift the module
(7) Replace the power supply module by
above the chassis to gain access to the coaxial
performing steps (1) through (6) above in reverse order.
connectors at the base of the module. (The module
5-26. Removal and Replacement of Submodules
multipin connector will be disengaged from the chassis
connector.) (7) Remove coaxial cable W5 from the
NOTE
bottom right module connector J2 (SHF input).
These procedures are performed with
(8) Remove the module and remove the
the frequency synthesizer module in
semirigid cable W3 from the bottom left module
the unit chassis except where noted
connector J4 (SHF output).
otherwise.
(9) Replace the module by performing steps
a. Removal and Replacement of Fixed Frequency
(1) through (8) above in reverse order. Replace coaxial
Generator Module (fig. 5-15).
cables and tighten the connectors with the torque wrench
(1) Turn the POWER switch to the OFF
provided.
position, remove the coaxial cables from the front panel,
(10) After replacement, perform the gain
and loosen the eight captive screws on the converter
drawer.
e. Removal
and
Replacement
of
SHF
(2) Pull on the two front panel handles and
Filter/Detector Module A5 (fig. 5-14).
extend the drawer to its open position.
(1) On the upconverter front panel, place the
(3) Remove two coaxial cables (W1 and
power circuit breaker to the OFF position.
W2)from the front of the module at location A1 Z1 J2 and
(2) Remove cables from the following front
A1 Z1 J3.
panel connectors: SHF OUT, 700 MHz IF, 70 MHz IF, 5
(4) In the center of the module remove coaxial
'MHz IN, and 5 MHz OUT.
cable to converter at A1 Z2 J2.
(3) Loosen the four captive screws on the
(5) Loosen the four captive screws which
front panel and open the upconverter drawer.
secure the module to the chassis and remove the
(4) On the SHF filter/detector module A5,
module.
remove the semirigid cable W7 from coaxial connector
(6) Replace the module by repeating steps (1)
DC2 (SHF output). Remove semirigid cable W3 from
through (5) above in reverse order except replace cables
coaxial connector FL1 (SHF input).
and tighten screws.
(5) Loosen the captive screws which secure
module A5 to the chassis and remove the module.
(6) Replace the module by performing steps
(1) Turn the POWER switch to the OFF
(1) through (5) above in reverse order. Replace the
position and remove the coaxial cables from the front
semirigid cables and tighten the connectors with the
panel and loosen the eight captive screws on the
converter drawer.
(7) After replacement, perform the gain
(2) Pull on the two front panel handles and
extend the drawer to its open position.
f. Removal and Replacement of Power Supply
(3) Loosen the two captive screws on the
module cable connector P1 and remove it from the
(1) On the upconverter front panel, place the
chassis connector XY2.
power circuit breaker to the OFF position.
(4) Loosen and disconnect cable W4 at Y2 J1
(2) Remove cables from the following front
panel connectors: SHF OUT, 700 MHz IF, 70 MHz IF, 5
carefully from synthesizer.
5-42