TM 55-4920-429-13
(4) Turn the SELF TEST switch clockwise through all positions. Verify that all operating
voltages are present and within the tolerances listed below and that all indicators are operational.
SELF TEST
Switch Position
Output Voltage Range
OFF
SELF TEST OFF
LAMPS
ALL LIGHTS COME ON
DISPLAY
+.8.8.8.8
DMM +5 VDC
DMM +15 VDC
DMM -15 VDC
+3.6 VAC
-3.6 VAC
13 VAC
26 VAC
-7 VDC
+7 VDC
+12 VDC
-15 VDC
+15 VDC
+28 VDC
+4.92 to +5.08 vdc digital
+14.81 to +15.19 vdc digital
-14.81 to -15.19 vdc digital
+3.26 to +3.94 vac analog
-3.26 to -3.94 vac analog
+11.72 to +14.28 vac analog
+23.20 to +28.80 vac analog
-6.83 to -7.17 vdc analog
+6.83 to +7.17 vdc analog
+10.85 to +13.15 vdc analog
–14.81 to -15.19 vdc analog
+14.81 to +15.19 vdc analog
+23.00 to +29.00 vdc analog
(5) If all self test indications areas required, begin the test of the AFCS components. Refer to TM
55-1520-240-23.
c. Shutdown Procedure.
(1) Set the 28 VDC and 115 VAC POWER switches to OFF.
(2) Shut down helicopter power.
(3) Disconnect the cables, first from the helicopter and then from test set.
(4) Connect helicopter Jl (031P8) and J3 (031P3) for AFCS #1 or Jl (031P10) and J3 (031P4)
for AFCS #2 to AFCS computer.
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