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TM 5-6350-262-14/4
6-9.
EOL Module Replacement
(4)
Interconnecting wire(sa
a.
The need to replace the EOL Module is
considered slight The need could occur if the assembly is
(5)
Input and Filter Assembly.
distorted by overtightening the mounting fastener.
It might
(6)  SPU terminal block
occur also if the assembly is damaged by dropping.
b.
Refer to figure 2-3 and replace the EOL  as
b.
Refer to figure 2-4 and replace the PWB
follows:
Assembly as follows:
Note
Caution
It is not necessary to turn off Control
Turn off Control Unit power to SPU
Unit power to the SPU.  However,
before removing PWB Assembly from
observe that tamper alarm will occur
SPU chassis
when the loop
sensor wires are
(1)  Turn off Control Unit power to SPU.
disconnected
(2)
Remove SPU cover.
(1)  Remove and retain mourning fastener.
(3)
Remove and retain three board attaching
(2)
Remove EOL Module cover.
screws
(3)
Disconnect loop sensor wires.
(4)
Loosen terminal st .ws and disconnect wires.
(4)
Install replacement EOL Module (para 28d5)
(5)
Install replacement PWB Assembly (para
(5)  Perform functional check (para 2-9) or bench
(6)  Perform functional check (para 29 and 2-10)
check (para 6 '9).
or bench check (para 6-19)
6-10. Loop Sensor Replacement
6-12. Input and Filter Assembly Replacement
a.
The need to replace the loop sensor is
a.
The Input and Filter Assembly is a separable
contingent upon:
component of the SPU chassis.  The need to replace this
(1)  Failure to pass a continuity test, and
assembly is contingent upon:
(2)
Inability to locate and repair defect.
(1)  Failure to pass a continuity check
Note
(2)  No  visible  broken  (repairable)  solder
A
loop
sensor
wire
that
is
connection.
inadvertently  cut  through  can  be
b.
Replace the Input and Filter Assembly as
repaired with an insulated, tubular,
follows:
crimped splice .Damage to insulation
can be repaired with electrician's tape.
(1)  Turn off Control Unit power to SPU.
b.
Refer to figure 2-3 and replace the loop sensor
(2)
Remove SPU cover.
as follows:
Note
(3)
Remove PWB Assembly from SPU (para
It is not necessary to turn off Control
611lb
Unit power to the SPU. The broken or
shorted loop sensor wire has caused
(4)  Check continuity through Input and Filter
the SPU to  output a tamper alarm.
Assembly.(para 6-23-
Therefore,  disconnecting  the  loop
Note. Steps (5) through (9) do not apply if continuity checks
sensor wires from the EOL Module or
out properly. (This would mean replacement rather than
the SPU input will have no further
reinstallation of PWB Assembly)
effect-
(5)  Refer to figure 2-3 and disconnect loop sensor
(1)  Open EOL Module cover and disconnect loop
wires from input terminals.
wires
(6)
Remove and retain four screws (6, fig. C-1
(2)  Remove SPU cover and disconnect loop
sensor wires.
(7)
Remove Input Output Assembly (7) from
chassis (5-
(3)  Cut terminals from loop sensor input ends and
remove grommet, if applicable.
(8)  Tag and unsolder two lead wires and solder
them to replacement assembly.
Note
Step (5) is not necessary if grommet
(9)  Set replacement assembly (7) in chassis (5)
previously used is split type.
If
and secure with four screws (6-
grominet is not serviceable, it should
be replaced.
(10) Reinstall or replace PWB Assembly, as
applicable.
(4)  Remove loop sensor from weapons racks.
(11) Refer to figure 2-3 and connect loop sensor
(5)
Install replacement loop sensor (para 2-8dt
wires to input terminals.
(6)  Perform functional check (para 2-9 and 2-10)
(12) Reinstall SPU cover.
6-11. PWB Assembly Replacement
a.
The PWB Assembly must be replaced if a
(13) Perform functional check (para 2-9 and 2-10)
malfunction of the MWS cannot be attributed to (nor be
or bench check (para 6-19w
corrected by replacement of):
6-13. SPU Enclosure Replacement and Repair
(1)  Batteries.
a.
Cover. The need to replace the SPU cover should
only occur as a result of tamper damage.  Damage resulting
(2)
EOLI Module.
from normal handling accidents should be
(3)
Loop Sensor.
6-4

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