Telephones and associated equipment, as used daily, will get dirty and sometimes worn badly. Unit
level maintenance is performed to keep the equipment in top condition. Failure to properly maintain the
equipment will mean it may not be ready when you must install it.
PART A - UNIT LEVEL MAINTENANCE ON TACTICAL TELEPHONES
The maintenance allocation chart in TM 11-5805-650-12 indicates that the unit maintainer can
inspect, service, install, replace, test and repair certain items on the telephone. Those items and the
items in the operator/crew preventive maintenance checks and services (PMCS) chart will be discussed.
(See Figure 2-1.)
First we will look at each item on the chart. The letters B, D, A, W, and M have a definite
meaning. They are--
Figure 2-1, item number 1 shows that the binding posts are being checked. This is important
because if the binding posts do not hold the wires securely, there is a good possibility that
communications will not be possible. Be sure to also check that each binding post has a rubber cover on
it. This is to protect the operator from electrical shock.
Item number 2 shows the battery compartment being checked. There should be no foreign matter
in the compartment. The contacts should be shiny clean and the springs should have some bounce to
them. Corrosion is a bad element to find in the battery compartment. It means someone forgot to
remove the batteries after the last time the telephone was used. Be sure the thumb knob works
Item number 3 shows the handset and the cord fastened to it are being checked. It should not be
twisted and should still have the spring inside working, causing the cord to retract. The cord should
show no signs of wear, cracks, or frays. The handset must be checked for cracks. The cover on the
transmitter and ear piece are on finger-tight and the holes are clean.