TM 11-6625-539-14-4
Corrective action
Probable cause
Malfunction
a. Tighten latch or strike screws.
1. Cover fails to open or close properly.
a. Loose latch or strike.
b.. Remove foreign material from gas-
b. Foreign material imbedded in gas-
ket.
ket.
c. Replace cover.
c. Cover damaged.
a. Tighten setscrews.
2. Knobs slip on control shafts.
a. Loose setscrews.
b. Knobs have stripped threads.
c. Replace knobs (para 4-12).
c. Knobs cracked.
3. Banana plugs loose in remote test
a. Replace test leads.
a. Damaged plugs on test leads.
b. Remote test jacks defective.
b. Refer to higher category mainte-
jacks.
nance.
4. Meter fails to indicate in BAT CHK
a. Batteries depleted.
range when BAT CHK switch is
operated.
b. Battery circuit defective.
b. Refer to higher category mainte-
nance.
Section VI. ORGANIZATIONAL MAINTENANCE OF TEST SET
4-11. General
b. To replace a knob, loosen the setscrew in the
knob and pull the knob from the shaft. Back off
This section describes maintenance procedures
the setscrew in the new knob and slide the knob
that are the responsibility of organizational main-
onto the shaft so that setscrew is aligned with the
tenance.
flat of the shaft. Tighten the setscrew snugly to
secure knob.
c. After tightening or installing knob, operate
If knobs are loose on the control shafts,
the control through its full operating range and
a.
tighten the setscrews to secure the knots to the
check that the knob pointer aligns with the panel
shafts.
markings for all operating positions.
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