TM 11-5820-880-12
Table 3-1. Operator Preventive Maintenance Checks and Services
NOTE
The checks in the interval column are to be performed in the order listed.
B = Before Operation D n During Operation A = After Operation W = Weekly M - Monthly
Interval
Procedures
Equipment is
Item to be
Item
not ready/
check and have repaired
Inspected
No.
or adjusted as necessary
available if:
B
D
A
W
M
NOTE
Procedures apply to both the
Multiplexer
2-channel and the 5-channel
multiplexer.
*
*
Check to see that the coupler is mounted
1
securely.
*
*
Check to see that the band-pass filters
2
and/or termination units are mounted
securely.
*
*
Loose or
Check the ground lug on the rear of the
3
damaged.
coupler.
*
*
Check all ground straps, and be sure that
4
they are in place, tight, and in good
condition.
*
*
Any of the
Check for broken knobs and lock knobs.
5
Controls,
three tuning
switches,
or lock knobs
and knobs
are broken or
missing.
*
*
Knob is
Check for broken meter unctions switch
6
knob.
broken or
missing.
*
*
7
Check to see that all tuning knobs, meter
function switches, and lock knobs move
through their required motion without
application of excessive force.
*
*
Check to see that knobs are securely
8
attached to the shafts of switches and
controls.
*
*
9
Check to see that the meter function
switches are oriented on their shafts so
that they indicate the proper setting at
each position.
3-3