Table 4-2. Organizational Preventive Maintenance Checks and Services Continued
ITEM TO BE INSPECTED
Inspect gaskets, insulators, bushings, and sleeves for cracks, chipping, and
Section IV. TROUBLESHOOTING
correctly, turn it off and check the following
This section contains troubleshooting in-
a. Wrong control settings or improper input
s t r u c t i o n s for the modulation meter. Any
malfunction that is beyond the scope of the
b. Damaged or incorrectly connected power
organizational maintenance activity to correct
shall be referred to general support maintenance.
When the modulation meter fails to operate
Section V. MAINTENANCE OF MODULATION METER
(2) Press in on the lamp and turn it coun-
terclockwise to unlock.
This section contains maintenance instructions
(3) Remove the defective lamp and replace it
applicable to organizational maintenance ac-
with a new one. Push in on the lamp and turn it
tivities. Maintenance of the modulation meter by
clockwise to lock.
this activity is limited to the following items:
(4) Replace the lens by screwing it on (clock-
Inspect the exterior of the equipment. The ex-
terior should be clean, and free of dust, dirt,
grease and fungus.
a Replacement of Fuse (fig. 3-1).
a. Remove dust and loose dirt with a clean lint-
DO NOT use a fuse rated above the
The fumes of trichloroethane are toxic.
equipment may result.
Provide thorough ventilation whenever
(1) Turn the fuse-holder cap counterclockwise
used. DO NOT use near an open flame.
Trichloroethane is not flammable, but
exposure of the fumes to an open flame
defective fuse. Remove the defective fuse and
c o n v e r t s the fumes to highly toxic,
replace it with a new one.
(3) With the new fuse installed, insert the
b. Remove grease, fungus, and ground-in dirt
fuseholder cap into the fuseholder. Press in on the
from the cases; use a cloth dampened (not wet)
freeholder cap and turn it clockwise to lock.
with trichloroethane. After cleaning, wipe dry
b. Replacement of Power Indicator Lamp (fig.
with a clean lint-free cloth.
(1) Unscrew (counterclockwise) the in-
c. Remove dust or dirt from plugs and jacks
dicating light lens and remove it to expose the
with a soft-bristled brush.