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Page Title:
PREVENTIVE MAINTENANCE CHECKS AND SERVICES FOR SINCGARS REMOTE CONTROL UNIT (RCU) |
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|  TM 11-5820-890-10-8
PREVENTIVE MAINTENANCE CHECKS AND SERVICES FOR
SINCGARS REMOTE CONTROL UNIT (RCU)
(Control, Receiver-Transmitter, C- 11561 (C)/U)
Not Fully Mission
Operator
Item to
Item
Capable If:
Procedure
Check/Service
When
Nr.
CONTROLS:
Before
1
Broken control does
Check for cracked or broken
a.
a.
During
SPKR
not function.*
controls.
RF PWR
After
Loose control does not
Check for loose
b.
b.
CHAN
function.*
controls.
MODE
Frozen control does
Check for frozen
c.
FCTN
C.
not function.*
controls.
DIM
Knob missing and
Check for missing
d.
d.
COMSEC
control does not
control knobs.
VOL
function.*
CABLES:
Before
2
Cable or field wire is
Check for missing cable or
a.
a.
Audio/Data (W4)
During
field wire.
missing.
Field Wire (WD1)
After
Check for proper installation
b.
of cable and field wire.
Check for tightness
C.
of connectors.
Check for obvious damage
d.
Cable or field wire is
to cable or field wire.
d.
damaged and cannot
be used**
Before
POWER:
3
Main battery is
Check for presence of RCU
a.
a.
Manpack
missing; cannot be
main battery.
replaced.
Check vehicle power
Vehicular
b.
No vehicle power;
b.
availability.
cannot be corrected.
Move COMSEC from Z to PT,
RCU
C.
RCU display does not
properly adjust DIM, move
C.
light.
FCTN from OFF to Z-FH;
and check that RCU display
lights.
SELF -TEST:
Before
4
RT display does not
a.
With RCU FCTN in Z-FH,
[Connect RCU to
a.
show "GOOD."
check that RCU display
RT and set RT
shows "GOOD."
FCTN to REM)
COMSEC alarm will
Move RCU COMSEC to CT
b.
b.
not clear.
and check that alarm will
clear.
Self-test ends with
Move RCU FCTN to TST and
c.
C.
other than "GOOD."
check that RCU display
shows "GOOD" at end.
8-14
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