TM 11-5805-356-34-1
G E N E R A L SUPPORT MAINTENANCE INSTRUCTIONS
Section I. GENERAL MAINTENANCE INFORMATION
a. General support maintenance consists of trou-
a. General. To perform the general support mainte-
bleshooting by signal tracking (b below), adjust-
nance tests, fabricate three cables (two loop patch
ments (c below), and testing (d below), of the TH-22/
cables and a 600ohm hookup cable). Use the materi-
TG and its component pc boards.
als listed in section II to fabricate the cables.
b. Troubleshooting at general support includes all
b. Loop Patch Cable.
the techniques outlined for organizational mainte-
(1) Cut two pieces of hookup wire, each 4 feet
nance (TM 115805-356-12), direct support mainte-
long.
nance (ch. 3), and any special or additional techniques
(2) Strip 1/2 inch of insulation from both ends of
required to locate and isolate a defective part in the
each wire.
TH-22/TG circuits. These procedures are outlined in
(3) Unscrew and remove the insulated covers
section III.
from two telephone plugs.
c. Adjustments at general support include all the
(4) Insert wire through the back of the insulated
adjustments outlined for organizational mainte-
plug covers so that they face back-to-back.
nance (TM 11-5805-356-12), direct support mainte-
(5) Connect one wire to the tip and the second
nance (ch. 3), and the adjustment of the oscillator
wire to the sleeve of each plug.
output frequencies (para 4-8).
(6) Screw the insulated covers back on the plugs.
d. General support maintenance testing proce-
c. 600-OHM Hookup Cable.
dures consist of complete final testing procedures for
(1) Cut two 2-foot lengths of hookup wire.
the TH-22/TG and F-316/U. These procedures de-
(2) Strip 1/2 inch of insulation from both ends of
termine the acceptability of repaired equipment by
each wire.
testing the equipment against specific requirements.
(3) Connect and solder one wire to each 600-ohm
The repaired equipment must meet these require-
resistor lead.
ments before it is returned to the using organization.
(4) Tape exposed wires.
The general support testing procedures are covered
in paragraphs 4-9 through 4-12.
Section II. TOOLS AND TEST EQUIPMENT
Test equipment and tools
Associated technical manual
Electronic
Counter
AN/
Support Maintenance
USM-459 . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . ..TM 11-6625-700-10
The following chart lists the test equipment and
Digital Multimeter AN/
PSM-45 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. Not applicable
tools required for general support maintenance:
Digital Multimeter AN/
Test equipment and tools
Associated technical manual
PSM-486 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. Not applicable
Attenuator TS-402/U . . . . . . . . . . . . . . . . ..TM 11-2044
oscilloscope AN/USM-281 . . . . . . . ..TM 11-6625-1703-15, or TM
Decade Capacitor,
Commercial Literature
11-6625-2658-14
(NSN 6625-00-220-9441) part
Test Set AN/USM-181 . . . . . . . . . . . . . . ..TM 11-6625-602-12
of Laboratory Standards, AN/
Teletypewriter Test Set AN/
URM-2A
GGM-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..TM 11-6625-422-12
consisting of:
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