C2 TM 11-6625-928-35
CHAPTER 4
DEPOT MAINTENANCE AND OVERHAUL STANDARDS
Section I. DEPOT MAINTENANCE
with the general requirements for electronic equip-
4.1. Scope of Depot Maintenance
ment as indicated in TB SIG 355 series bulletins
Depot maintenance consists of those maintenance
procedures which are required to return the equip-
4-2. Tools, Test Equipment, and Materials
ment to a performance status equivalent to that of
Required
new equipment. The maintenance procedures are
Refer to paragraph 3-9 for those tools and test
those indicated for Direct and General Support
equipment required for Depot maintenance. No
plus those procedures that are mechanical and/or
materials are required that are not readily avail-
structural in nature as required for equipment
rebuild. All rebuilding procedures must conform
able through normal Depot facilities.
Section Il. DEPOT OVERHAUL STANDARDS
4-3. Applicability of Depot Overhaul
4-5. Test Facilities Required
Standards
The following equipments, or suitable equivalents
will be used in determining compliance with the
Test Facilities Kit MK-994/AR must be tested
requirements of this specific standard.
thoroughly after rebuild or repair to insure that it
meets adequate performance standards for return
b. Additional Equipment.
to stock and reissue. Use the tests described in this
Equipment
Quantity required
section to measure the performance of the repaired
+27.5 0.5 volts dc power source at 10 amp
1
equipment. It is mandatory that equipment to be
+ 115 5 volts, 400 Hz, single-phase at 0.5 amp
1
reissued, or returned to stock for reissue, meet all
Fabricated voltage divider and special test probes (see 1
of the performance standards given in this section.
4-6. General Test Requirements
4-4. Applicable Standards
a. Fabricate voltage divider and special test
probes in accordance with figure 3-17 and para-
a. Repair Standards. Applicable procedures of
the depots performing these tests and the general
standards for repaired electronic equipment given
b. Set all power switches to OFF. Set dc power
in TB SIG 355-1, TB SIG 355-2 and TB SIG 355-3
supply output for O volt and then disconnect from
form a part of the requirements for testing this
the power source.
equipment.
4-7. Tests of Test Facilities Kit MK-994/AR
Perform the following tests in the sequence given.
b. Modification Work Orders. Perform all modi-
Tests shall be identical to the tests in chapter 3,
fication work orders applicable to this equipment
section III.
before making tests specified. DA Pam 310-7 lists
all available modification work orders.
c. Technical Publications. The depot overhaul
standards for Indicator, Heading--Radio Bearing
ID-1351/A, a portion of Test Facilities Kit MK-
994/AR, are contained in TM 11-5895-537-50.
4-1
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