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Page Title:
Replacement of Reflected Power Detector 3A7CR1 |
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|  TM 11-5820-695-35
(4) Set the status panel 3A8 POWER
(1) Replace new detector loosely in
ON/OFF switch 3A8S1 to ON.
position in plastic loop clamp and connect SMA
connector to right end.
(5) Make the following checks on the CV-
3633/GRC-144(V).
(2) Tighten key nut to secure detector in
plastic loop clamp, but do not over tighten.
(a) The 2 AMP and 1.5 AMP neon
indicators on status panel 3A8 (fig. 3-9.2) are not
(3)
Connect SMA connector to left end of
lighted.
detector.
(b) Press the PRESS TO TEST
(4) Replace alarm monitor 3A1 and
OSC TEMP pushbutton switch 3A8DS1 to check that
converter frequency electronics 3A2.
the lamp operates. The OSC TEMP indicator should
(5) Set the T-1054(P)A/GRC-144(V) and
illuminate within 30 minutes after turning equipment on.
R-1467(P)A/GRC-144(V) POWER ON/OFF switches to
OFF.
NOTE
(6) Set the POWER ON/OFF switch on
Radio communications can normally
the status panel 3A8 to ON.
be established 5 to 10 minutes after
the AN/GRC-144(V)4 has been turned
(7) Perform the CV-3633/GRC-144(V)
on if the ambient temperature in the
reflected power alarm threshold test and calibration
shelter is maintained above +70
procedure (para 3-77).
degrees Fahrenheit.
3-53.4.
Replacement
of
Directional
Coupler
3-53.3.
Replacement
of
Reflected
Power
3A7DC1 (fig. 5-108)
Detector 3A7CR1 (fig. 5-108)
a.
Removal.
a.
Removal.
(1) Set the T-1054(P)A/GRC-144(V) and
(1) Set the POWER ON/OF switch on the
R-1467(P)A/GRC-144(V) POWER ON/OFF switches to
status panel 3A8 to OFF.
OFF.
(2) Remove alarm monitor 3A1 and
(2) Set the POWER ON/OFF switch on
converter frequency electronics 3A2.
the status panel 3A8 to OFF.
(3) Carefully
remove
SMA
connector
(3) Remove the CV-3633/GRC-144(V)
from left end of detector.
from the R-1467(P)A/GRC-144(V) cabinet.
(4) Loosen hex nut that secures detector
(4) Remove screws that secure top cover
3A7CR1 to electrical equipment chassis 3A7 plastic loop
of electrical equipment chassis 3A7 (fig. 5-108, top
clamp.
view with cover removed).
(5) Carefully remove SMA connector
(5) Loosen SMA connector at right end of
from right end of detector, then remove detector.
detector 3A7CR1, then carefully remove SMA connector
from directional coupler 3A7DC1.
b.
Replacement.
Change 6
3-74.2
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