TM 11-6625-847-45
CHAPTER 5
DEPOT OVERHAUL STANDARDS
Test Equipment
Technical manual
5-1. General
Electronic Counter. Digi-
TM 11-6625-700-10
Complete rebuild of the SM-442A/GRC or its individual
tal Readout AN/USM-
components may be accomplished by depot
207.
maintenance facilities, when authorized.
Generator, Signal AN/
TM 11-6625-683-15
URM-127.
5-2. Applicability of Depot Overhaul Standards
Oscilloscope AN/USM-
TM 11-6625-535-15
140 (*).
The tests outlined in this chapter are designed to
Charger, Battery PP-
TM 11-6130-236-12
measure the performance capability of a repaired SM-
1451/G.
442A/GRC. Equipment that is to be returned to stock
MuItimeter ME-26(*)/U
TM 11-6625-200-12
should meet the standards given in these tests.
5-5. Depot Testing
5-3. Applicable References
Before performing each of the tests (para 5-7, 5-9, 5-11,
a. Repair Standards. Applicable procedures of the
switch and control settings (para 5-6, 5-8, 5-10, 5-12, 5-
depots performing these tests and the general standards
14, and 5-16) preceding each test have been complied
for repaired electronic equipment given in TB SIG 355-
with. When testing, perform each step in its proper
1, TB SIG 355-2, and TB SIG 355-3 form a part of the
numerical sequence.
requirements for testing this equipment.
5-6.
Test Set, Preliminary Switch and Control
Settings
b. Modifications Work Orders.
Perform all
modification work orders applicable to this equipment
Switch or control
Setting
before making the tests specified. DA Pam 310-7 lists
POWER switch
OFF
all available MWO's.
SERV SEL switch
OFF
PA/RT switch
PA
KEY switch
OFF
5-4. Test Facilities Required
XMIT STATUS switch
OPR
The equipment in the chair below is required for depot
REC/XMIT switch
REC
testing.
ALC VOLTAGE INFO
Fully counterclockwise
control
Test equipment
Technical manual
ALC VOLTAGE TUNE
Fully counterclockwise
Multimeter AN/PSM-6B
TM 11-6625-475-10
control
IF OSCILLATOR elect
4
Voltmeter, Electronic
TM 11-6625-524-14
switch
AN/URM-145.
MC FREQ 10MC switch
0
MC FREQ 1MC switch
0
MC FREQ .1MC switch
0
500 VDC LOAD switch
LOW
2400 VDC LOAD switch
1
5-7. Test Set, Operational Performance Test
Step
Control setting and operation of
No.
Operation of test equipment
equipment under test
Performance standard
1
Make sure that +27-
a. Set the switches and con-
a. None.
volt dc primary power
trols on the test set to the
is supplied to the
settings listed in para-
POWER connector
graph 5-6.
on the test set.
2
b. Set the POWER switch to
b. POWER indicator is illumi-
ON.
nated.
Change 2 5-1
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