T.O. 33A1-3-358-11/TM 11-6625-842-15
Section VI
NAVAIR 16-30APM239-2
Paragraphs 6-16 to 6-18
Reset the AC CONTROL knob for an indication of 115 volts on the test set voltmeter. The test
i.
set ammeter must indicate between 0.92 amp and 1.08 amps.
Close switch S3 on the test fixture. The SWITCHED AC POWER indicator must illuminate.
j.
Open switch S3 on the test fixture. The SWITCHED AC POWER indicator must be extinguished.
k.
6-16. D-C POWER SUPPLY TESTS.
Set the METER SELECT switch to DC.
a.
b.
Set the POWER MODE switch to DC ONLY.
Set the multimeter to measure d-c voltage of approximately 35 volts. Connect the test probe
c.
of the multimeter to test fixture test point TP1, and connect the common probe of the multimeter to test
point TP3.
Rotate the DC CONTROL fully clockwise. The multimeter must indicate 35 volts minimum.
d.
Disconnect the multimeter and close switch S2 on the test fixture.
e.
f.
Adjust the DC CONTROL to obtain an indication of 28 volts on the test set voltmeter. The test
set ammeter must indicate between 6 amperes and 8 amperes.
Connect the oscilloscope ground to test fixture test point TP3, and connect the oscilloscope
g.
probe to test point TP1. Energize the oscilloscope and set the controls to measure a-c ripple. Maximum
permissible ripple is 2 volts peak-to-peak.
h.
Disconnect the oscilloscope.
Close test fixture switch S1. The CAUTION indicator must illuminate.
i.
Open test fixture switch S1. The CAUTION indicator must extinguish.
j.
k.
Disconnect the test fixture from the test set.
6-17. PANEL LIGHT VOLTAGE CHECK.
a.
Loosen the four captive turnlock fasteners which attach Transponder Set Control C-6280(P)/APX
or C-6280A(P)/APX to the front panel of the test set.
b.
Carefully pull the transponder set control from the front panel of the test set and disconnect the
plug from the rear of the transponder set control.
c. Set the multimeter to measure a-c voltage of approximately 6 volts. Connect the common probe
of the multimeter to terminal 53 (ground) of the plug removed from the transponder set control (P1).
d.
Connect the test probe of the multimeter to terminal 12 of plug P1.
Set the PANEL LIGHTS switch to 6V. The multimeter must read between 5 volts and 7 volts.
e.
Set the multimeter to measure a-c voltage of approximately 28 volts.
f.
Set the PANEL LIGHTS switch to 28V. The multimeter must read between 25 volts and 31 volts.
g.
h.
Set the PANEL LIGHTS switch to OFF, and disconnect the multimeter.
i.
Connect plug P1 to the rear of the transponder set control, and replace the transponder set con-
trol in the test set. Tighten the four captive turnlock fasteners to secure the transponder set control to the
test set front panel.
6-18. MODE C SIMULATOR VOLTAGE OUTPUT TESTS.
a. Set the multimeter to measure d-c voltage of approximately 1.5 volts. Connect the common
probe of the multimeter to MODE C ENCODER connector J5, terminal R (ground).
6-4
