TM 11-6625-820-45
j. Reassembly and Lubrication of Control
3-5. Disassembly Techniques for Test Set,
Unit. Refer to TM 11-5826-226-35 for reas-
Wiring Harness, Aircraft
sembly and lubrication procedures for Control,
TS-2501/ARM-92
Radio Set C-6873/ARN-82.
Remove the bottom panel of the aid box as
k. Replacement of Control Unit.
follows:
(1) Connect P5 to the control unit con-
a. Remove the six screws that hold the bot-
nector.
tom panel in place.
(2) Replace the control unit in the front
b. Lift the bottom panel away.
panel.
(3) Tighten the four Dzus fasteners.
3-6. Reassembly Techniques for Test Set,
l. Replacement of Front Panel.
Wiring Harness, Aircraft
(1) Connect the power cable to J5.
TS-2501/ARM-92
( 2 ) Place the front panel back in the
lower carrying case. Be sure no ca-
Replace the bottom panel of the aid box as
bles are pinched between the chassis
follows :
and the carrying case.
a. Place the bottom panel on the aid box.
(3) Replace the 13 screws in the perime-
b. Replace the six screws, to hold the bottom
ter of the front panel.
panel in place.
ALIGNMENT
Section Il.
d. Disconnect the MOD OUTPUT connec-
3-7. General
tor of the vor modulator from the VAR con-
Alignment procedures for Test Sets, Radio
nector of the resolver test set.
AN/ARM-92 and AN/ARM-92A are given in
e. Connect the INPUT of the vacuum-tube
voltmeter (vtvm) to the VOLTMETER con-
bearing alignment is given in paragraph 3-9.
nector on the resolver test set.
Alignment of the COMPASS SIMULATOR in-
f. Set the function switch on the resolver
d i c a t o r is given in paragraph 3-10. Refer-
test set to SET ORZ.
ences to the alignment procedures are given
g. Adjust the INPUT LEVEL control on
for the OBS indicator, RMI and control unit
the resolver test set for 4.25-volt indication of
i n paragraphs 3-11 through 3-13.
Refer-
the vtvm.
e n c e s to the test equipment required are
given in paragraph 3-8.
h. Remove the INPUT of the vtvm from
the VOLTMETER connector, and connect it
3-8. Test Equipment Required for
to the OUTPUT connector on the resolver test
Alignment
set.
Refer to paragraph 2-3 for a list of the test
i. Set the VOR/LOC-GLIDE SLOPE switch
equipment required for alignment procedures.
on the test set the VOR/LOC.
j. Set the BEARING selector switch on the
3-9. Precision Bearing Alignment
test set to 300.
k. Unlock potentiometer R1 located behind
the front panel of the test set.
b. A special cable is required for precision
l. Alternately adjust the AMP.BAL. con-
bearing alignment. Refer to paragraph 4-4 for
trol on the resolver test set and potentiometer
construction details of this cable.
R1 in the test set to obtain the least possible
signal amplitude (minimum null) as observed
c. Connect the equipment as shown in fig-
on the oscilloscope.
fer to TM 116625-492-12 for calibration of
Note. A S the null is approached, increase the vertical
Test Set, Resolver AN/ARM-101.)
gain of the oscilloscope.
Change 2 3-5
