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Operating Procedures for Differential Test
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TM-11-6625-2843-14 Test Set Synchro TTU-23/E Manual
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SECTION II. ORGANIZATIONAL TROUBLESHOOTING
TM 11-6825-2843-14
ORGANIZATIONAL
MAINTENANCE
INSTRUCTIONS
Section
I.
INTRODUCTION
Services
4-1.  Tools  and  Test  Equipment  Required
a. To insure that the test set is always ready for
Tools and test equipment required at organizational
operation, it must be inspected systematically so that
maintenance consists of:
defects may be discovered and corrected before they
a. T o o l K i t , E l e c t r o n i c E q u i p m e n t T K - 1 0 1 / G .
r e s u l t in serious damage or failure. The necessary pre-
b. T o o 1 K i t , E l e c t r o n i c E q u i p m e n t T K - 1 0 5 / G .
ventive maintenance checks and services to be per-
AN/USM-223.
f o r m e d are listed and described in table 4-1. The item
d. T e s t S e t , E l e c t r o n T u b e T V - 7 / U .
numbers indicate the sequence of and minimum in-
Repainting
and
Refinishing
lnstruc-
spection required. Defects discovered during operation
tions
o f the test set will be noted so that repairs maybe made
Remove dust and corrosion from metal surfaces by
w h e n test set operation has ceased. Stop operation im-
lightly sanding the surfaces with fine sandpaper.
mediately if a deficiency is noted during operation
B r u s h two thin coats of paint on the bare metal to pro-
which would damage the equipment. Record all defi-
tect it from further corrosion. Use the following
ciencies together with the corrective action taken on
references as a guide to repainting and refinishing
the appropriate maintenance form (TM 38-750).
a. S B 1 1 - 5 7 3 .
b. S o m e o f t h e i t e m s t o b e i n s p e c t e d a r e l o c a t e d i n
b. A R 7 4 6 - 5 .
the interior of the teat set and are only accessible by
C. T B 4 3 - 0 1 1 8 .
removing the panel assembly. Refer to paragraphs 4-7
through
4-10
for
removal
procedures.
Preventive
Maintenance
Checks
and
4-1.
Organizational
Prevention
Maintenance
Checks
and
Services
W-Weekly
Q-Quarterly
D-Daily
Task
hours
Task
hours
Task
hours
required
0.4
required:
0.7
required
1.3
ITEM TO BE INSPECTED
Worktime
PROCEDURE
D
(T/H)
1
0.1
TEST
SET
EXTERIOR
1
Check
to
see
that
carrying
handle
is
securely
mounted
and
that
case
and
cover
are
not
damaged,
Secure the cover; make certain the latches and hinge work properly.
0.1
CLEANINESS
OF
EQUIPMENT
2
Inspect the exterior surfaces of the test set. They should be clean, free of dust, grease, and fungus.
0.1
CONTROL
PANEL
3
Check
to
see
that
controls
and
indicators
are
securely
mounted
and
without
visible
evidence
of
damage;
that
switches
have
a
positive
action;
that
variable
controls
rotate
freely;
that
indicator
pointers are neither broken nor bent and rotate freely and the POWER 16 lights when power is
applied.
0.1
TEST
SET
INTERIOR
Check
all
components
for
proper
mounting,
check
for
signs
of
leakage
or
overheating,
and
cracked
or
blistered components; check for frayed, broken, or abraded wiring; check solder connections to in-
sure proper electrical conduction, and check for the accumulation of dust, dirt, or grime.
0.3
SERVOAMPLIFIER
Test all tubes for proper emission and absence of internal shorts.
TEST
CABLES
0.1
4
Check
for
frayed,
broken,
kinked,
or
abraded
conductors;
damaged
sleeving
and
outer
tubing,
damaged
connectors;
loose
or
missing
clamps.
2
0.3
TEST
SET-SELF-TEST
5
Check to see that the teat set is functioning properly by performing the procedure given in paragraph
2-4.
0.1
PUBLICATIONS
Check DA Pam 310-4 to see that all publications are complete, serviceable, and current.
MODIFICATIONS
0.1
Check DA Pam 310-7 for applicable MWO's.
Check the test set to determine if MWO's have been performed. All URGENT MWO's must he ap-
plied
immediately.
All
NORMAL
MWO's
must
be
scheduled.

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