TM 55-1520-240-23-9
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BENCH TEST AFCS COMPUTER (AVIM)
(Continued)
11-277
595.
Set ANALOG SIGNALS AIRSPEED switch (35)
to 5.
596.
Set ANALOG SIGNALS BARO ALT switch (25)
to 1.
597.
Set CIRCUIT SELECT A UNITS switch (18) to 0.
598.
Set METER RANGE switch (7) to 20V. Read and
record V1 reading on AC/DC VOLTMETER (10).
599.
Set ANALOG SIGNALS BARO ALT switch (25)
to 2. Wait 20 seconds. Read and record V2
reading on AC/DC VOLTMETER (10).
600.
Calculate V3. Subtract reading of step 598 from
reading of step 599 (V3 = V2 - V1). Result shall
be +2.09 to +2.55.
601.
Set DISCRETE SIGNALS LDG GEAR switch
(47) to 1. Read AC/DC VOLTMETER (10).
Reading shall be -0.763 to -1.011.
602.
Set DISCRETE SIGNALS BOX IDENT switch
(61) to 0. Read AC/DC VOLTMETER (10).
Reading shall be -2.01 to -2.73.
603.
Set DISCRETE SIGNALS BOX IDENT switch
(61) to 1.
604.
Set DISCRETE SIGNALS LDG GEAR switch
(47) to 0.
605.
Set ANALOG SIGNALS BARO ALT switch (25)
to 3.
606.
Set LCT POWER switch (62) to OFF.
607.
Set ANALOG SIGNALS AIRSPEED switch (35)
to 2.
608.
Set SERVO SIMULATION LCT switch (60) to
GND.
END LCT TEST
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