TM 55-1520-240-23-9
11-277
BENCH TEST AFCS COMPUTER (AVIM)
(Continued)
11-277
307.
Set ANALOG SIGNALS AIRSPEED switch (35)
to 6. Read and record V22 AC/DC VOLTMETER
(10) reading.
308.
Calculate V23. Subtract reading of step 293 from
reading of step 307 (V23 = V22 - V19). Result
shall be -3.20 to -4.10 volts.
309.
Set ANALOG SIGNALS AIRSPEED switch (35)
to 5.
310.
Set METER switch (6) to AC.
311.
Set CIRCUIT SELECT TENS switch (8) to 20.
312.
Set CIRCUIT SELECT B UNITS switch (11) to 6.
313.
Set CIRCUIT SELECT A/B SELECT switch (9)
to B.
314.
Adjust ANALOG SIGNALS PITCH ATT HSI HDG
pot. (42) toward 900 until AC/DC VOLTMETER
reads +8.88.
315.
Set METER switch (6) to DC.
316.
Set CIRCUIT SELECT TENS switch (8) to 10.
317.
Set CIRCUIT SELECT A UNITS switch (18) to 4.
318.
Set CIRCUIT SELECT A/B SELECT switch (9)
to A.
319.
Set METER RANGE switch (7) to 2V.
320.
Adjust ANALOG CIRCUITS ATT synchro (38)
toward 170 until AC/DC VOLTMETER (10) reads
0 or obtain a NULL. Read ATT synchro dial
setting. Reading shall be 170.2º to 172.7º.
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