TM 11-5820-890-30-4
Subject
Section IV. MAINTENANCE PROCEDURES
Para
General . . . . . . . . . . . . . . . . . . . . . . . . . .
Operational Check
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Repair Instructions . . . . . . . . . . . . . . . . . . . . . . . .
Replacement of Rear Cover Assembly (15A1) . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacement of Case/Flexible Cable Assembly . . . . . . . . . . . . . . . . . . . .. .
Replacement of Loudspeaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacement of ON/OFF Switch (CB1)
. . . . . . . . . . . . . . . . . . . . . . . . .
Replacement of POWER Lamp Holder (DS1)
. . . . . . . . . . . . . . . . . . . . . . . . . .
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16-15
16-16
16-17
16-18
16-19
16-20
16-21
Page
16-24
16-24
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16-26
16-28
16-29
16-30
16-14. GENERAL.
This section includes the operational check and the repair procedures. The operational check is used to verify
the operation of a repaired LS-671/VRC. It is also used to verify the symptom of a faulty LS-671/VRC. It will
identify the troubleshooting chart to be used. When a bad module is identified, replace it using the procedure in
this section.
16-15. OPERATIONAL CHECK.
Perform the operational check found
16-16. REPAIR INSTRUCTIONS.
The following instructions apply to all
in paragraph 16-9 to verify proper operation of the LS-671/VRC.
repair tasks unless otherwise noted in the procedure.
a.
b.
c.
d.
Begin procedure with the LS-671/VRC ON/OFF switch (CB1) set to OFF.
Disconnect any external cables connected to the LS-671/VRC.
Inspect the LS-671/VRC. Replace the LS-671/VRC case/flexible cable assembly, if the LS-671/VRC is
physically damaged, such as with a broken connector.
CAUTION
Steps marked with must be performed exactly as written. They are critical in maintaining
the nuclear hardness of the LS-671/VRC. Seals must not be damaged. All screws must be
torqued to the limits specified in the replacement procedures.
The LS-671/VRC must be tested after replacement of a module or component.
16-24
