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Figure 5-12. RT-980/GRC-171 Module Location, Left Side
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TM-11-5820-815-14 Service and Circuit Diagrams RADIO SET AN/GRC-171 Manual
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Figure 5-13. RT-980/GRC-171 Module Location, Top View Partial


TO 31R2-2GRC171-2
TM 11-5820-815-14
NAVELEX 0967-LP-544-5010
5-39.
RF FILTER MODULE A7.
a. Remove top cover.
b. Remove  d/a  servo  amplifier  module  A1
5-40.  REMOVAL OF MODULE. To remove module
c. Remove frequency synthesizer module A2
from chassis, refer to figure 5-10 and proceed as
follows:
d. Remove module from chassis by carefully
a. Remove top cover.
sliding  module  forward,  disengaging  A9P1  from
b. Remove screw from top.  rear left corner of
AlOA2J14, and lifting module from chassis.
module and screw from top, right edge of module.
c. Disconnect receiver rf cable connector A7A3P2
5-47.  REPLACEMENT OF MODULE. Replace mod-
from A3J2.
ule in the reverse order of its removal.
d. Remove module from chassis by carefully lifting
module up and disengaging module plugs from chassis
CAUTION
jack.
5-41.  REPLACEMENT OF MODULE. Replace mod-
Ensure
proper
module-to-
chassis plug and pin alignment
ule in the reverse order of ifs removal.
is  achieved  before  seating
CAUTION
module in to position.  Do not
exert abnormal force to seat
module.
Ensure
proper
module-to-
chassis plug and pin alignment
5-48.
FRONT PANEL (P/O CHASSIS A10).
is  achieved  before  seating
module into position.  Do not
5-49.  REMOVAL OF PANEL. To remove front panel
exert abnormal force to seat
module.
from chassis, proceed as follows:
5-42.
POWER AMPLIFIER MODULE A8.
a. Disconnect antenna/transceiver U-shaped con-
nector  from  ANT  and  XCVR  jacks  (AlOW2J1/
5-43. REMOVAL OF MODULE. To remove module
A10W3J2).
b. Remove three screws from forward, left side of
from chassis, refer to figure 5-10 and proceed as
chassis and three screws from forward, right side of
follows:
chassis.
a. Remove top cover.
c. Remove five screws from bottom edge of front
b. Loosen four captive screws on corners of
panel.
module.
d. Remove three screws from center of front panel
c. Remove module from chassis by carefully lifting
(two screws behind TEST POINT access door).
module up and disengaging module plugs from chassis
e. Front panel can now be brought forward and laid
jacks.
face down.
5-44. REPLACEMENT OF MODULE. Replace module
5-50.  REPLACEMENT OF PANEL.  Replace front
in the reverse order of its removal.
panel in the reverse order of its removal.
CAUTION
CAUTION
Ensure proper module-to-chassis plug and pin alignment
Do not place excessive strain
is achieved before seating module into position. Do not
on inter-connecting cabling and
exert abnormal force to seat module.
wiring  during  removal  and
5-45.
KEYER MODULE A9
replacement  of  front  panel.
Ensure interconnecting cabling
5-46.  REMOVAL OF MODULE. To remove module
and  wiring  is  not  pinched
between chassis and front panel
from chassis, refer to figures 5-10 and 5-13 and proceed
during installation of front panel.
as follows:
5-50


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