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 TM 55-1905-223-10
Table 2-2. Operator/Crew Preventive Maintenance Checks and Service - CONT
B - Before
D - During
A - After
W - Weekly
M - Monthly
INTERVAL
PROCEDURES
EQUIPMENT IS
ITEM
ITEM TO BE
CHECK FOR AND HAVE REPAIRED
NOT READY/
NO
B
DA W M
INSPECTED
OR ADJUST AS NECESSARY
AVAILABLE IF:
9
Intercom -
b. Check the indicator lamps.
l
l
Continued
The call lamps at the called
station(s) should be lit.
The REL la p at the calling
m
station should be lit. If
called station is busy, the
busy light should be lit.
c. Check the control switches.
l
l
Vary position of the dimmer
control switch and observe
intensity of the panel
illumination. Vary VOLUME
control switch during
reception and verify
intensity of the received
speech is controlled.
d. Check the hands free
One or more
l
l
capability by operating
unit
hands free with another
malfunctions
station in the system.
occur.
Document all observed unit
malfunctions and refer to unit
maintenance.
10
Sound Powered
Telephones
a. Head Set-
Visually inspect head set
l
l
l
Chest Set
connections to the chestset for
frayed wiring on loose
connections. Inspect ear cups
for tears and cleanliness.
Inspect neck straps for fraying
or missing fasteners. Press
pushbutton on mouthpiece and
release. Obseve pushbutton
r
goes in and out. Visually
inspect wire from chest set to
jack plug for loose
connections, cracks on damaged
insulation.
2-215
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