c. Clean electrical contacts with a dry cloth and plug polish.
Caution: DO not push any sharp object through the holes in the
earphones.
8. Organizational Maintenance. a. Took and Equipment. The
following tools and equipment are required for organizational main-
tenance of Headset H113/U:
Screwdriver TL-455/U
Screwdriver TL-21
Open-end wrench, -inch
b. Maintenance Procedure.
(1) Tighten loose connections and earphone mounting screws.
(2) Make electrical continuity check of cord assembly and ear-
phones.
(3) Replace defective earphones.
9. Field Maintenance. a. Tools and Equipment. The following
tools and equipment are required for field maintenance of Headset
H-113/U :
Screwdriver TL-455/U
Screwdriver TL-21
Open-end wrench, -inch
Screwdriver TL-523/U
Pliers TL-126
Pliers TL-103
Knife TL-29
Multimeter TS-352/U
Test Set 1-142, I-142-A, or I-142-B
b. Maintenance Procedure.
(1) Tighten loose connections and earphone mounting screws.
(2) Make electrical continuity check of cord assembly and ear-
(3) Replace defective earphones.
(4) Replace defective cord assembly.
(5) Replace defective plug.
(6) Replace headband.
(7) Make receiving efficiency test on headset as explained in TM
112062, Test Sets I142, I142-A, and I-142-B.
3
TAGO 2167B