TM 11-5826-225-35
Section IV. TROUBLESHOOTING MOUNTING MT3605/ARN-83 AND INVERTER,
POWER, STATIC CV-2128/ARN-83
verter. The inverter test setup is illustrated in
2-13. Test Setup
The only troubles that can occur in the re-
2-14. Localizing Troubles
ceiver mount are damage to connectors (JI
a. Set test set DC POWER switch to ON
and J2 of fig. 224) and aircraft wiring con-
and allow 5 minutes for inverter warmup. The
nections to the receiver mount. Therefore, the
other test set controls may be in any position.
remainder of this section will be devoted to
b. Set controls on Multimeter ME-26/U
the inverter. All tests on the inverter require
(vtvm) to a range suitable for measuring 26
connections to Test Set, Direction Finder Set
volts ac. Connect the common test lead of vtvm
AN/ARM93 and the source of 27.5-volt dc
to a convenient ground on the test set front
power used for testing the receiver and control
panel. Insert the tip of the vtvm ac test probe
unit. After making certain the test set DC
into the center of the test set panel fuse holder
POWER switch is set to OFF, remove the
marked 1A. The voltage should be 26 2.0 volts ac.
plate at the top of the test set front panel
marked INVERTER. Loosen the two retaining
c. Set TIME UNIT switch of Frequency
screws on the inverter supplied with the test
Meter AN/USM26 (counter) to lKC, FUNC-
set and remove the inverter.
T I O N SELECTOR to FREQUENCY, and
a. Remove the inverter mounted in Mount-
STD. GATE TIME SEC. switch to 1 second.
ing MT3605/ARN83 (fig. 224).
Connect ground lead of counter to a ground
b. Connect one end of the test set cable W4
on the test set front panel. Connect SIGNAL
to the test set and the other end to connector
INPUT of counter to the fuse holder specified
PI on the inverter (fig. 225). The length of
in b above. The counter frequency read out
the cable will permit bench tests on the in-
should be 400 40 cps.
Figure 2-23. Inverter test setup.
2-40 Change 5
Previous Page
