TM 55-1520-240-23-9
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BENCH TEST AFCS COMPUTER (AVIM) (Continued)
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292.
Set ANALOG SIGNALS ATT synchro (38) to 0.0 .
293.
Set ANALOG SIGNALS PITCH HSI switch
(54) to HSI. Read and record V19 AC/DC
VOLTMETER (10) reading.
294.
Set ANALOG SIGNALS GND SIGNAL switch
(41) to SIGNAL.
295.
Set METER switch (6) to AC.
296.
Set CIRCUIT SELECT TENS switch (8) to 20.
297.
Set CIRCUIT SELECT A/B switch (9) to B.
298.
Set CIRCUIT SELECT B UNITS switch (11) to 6.
299.
Set METER RANGE switch (7) to 2V.
300.
Adjust ANALOG SIGNALS PITCH ATT HSI HDG
pot. (42) toward 525 until AC/DC VOLTMETER
(10) reads +0.603.
301.
Set METER switch (6) to DC.
302.
Set METER RANGE switch (7) to 20V.
303.
Set CIRCUIT SELECT TENS switch (8) to 10.
304.
Set CIRCUIT SELECT A UNITS switch (18) to 4.
305.
Set CIRCUIT SELECT A/B switch (9) to A.
Read and record V20 AC/DC VOLTMETER (10)
reading.
306.
Calculate V21. Subtract reading of step 293 from
reading of step 305 (V21 = V20 - V19). Result
shall be -1.44 to -1.73 volts.
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