TM 11-6625-596-12
Seq
Item
Procedure
Reference
No.
32
Stopping procedure
Set power switch to OFF.
CAUTION
Return the front panel controls to the following
positions
a NOISE GEN ADJ button.....................
depressed
b CALIBRATE controls
fully ccw.
(2) METER SENSITIVITY .................
fully ccw
(3) INSULATION RESIST-
ANCE .................................................
fully ccw.
(4) DIAL SPEED................................
fully ccw.
(5) DIAL BREAK................................
fully ccw.
LOAD
d TEST CONDITION switch ..................
COUPLER.
e MICROPHONE LOAD switch .............
OFF
f RECEIVER LOAD switch ...................
OFF
g MICROPHONE...................................
CURRENT
control.................................................
OFF
3-5.
Cleaning
Inspect the exterior surface of Telephone Test Set TS-716/U, including the front panel of panel chassis assembly 1A4
and top case assembly 1A2 which are exposed when the test set is ready for use. All surfaces should be clean, and free
of dust, dirt, grease, fungus, and moisture.
a. Use a soft cloth to remove dust, loose dirt, and moisture. Use a soft brush to remove dirt from the screen of
the test microphone. If dirt is difficult to remove from the front panel, panelboard, meter, and knobs, dampen the cloth
with water; use mild soap if necessary. Use only a dry cloth on the test loudspeaker and test microphone.
CAUTION
Do not use compressed air to clean either the test microphone or the test loud- speaker.
WARNING
The fumes of trichloroethane are toxic. Provide thorough ventilation whenever used. DO NOT use near
an open flame. Trichloroethane is not flammable, but exposure to an open flame converts the fumes
to highly toxic, dangerous gases.
b. Remove grease, fungus, and ground-in dirt from the case; use a cloth dampened (not wet)
with
trichloroethane (Federal Stock No. 6810-664-0387). Wipe the parts with a clean, dry cloth.
c.
Remove dust and dirt from plugs and jacks with a brush.
3-4