4-50. SAS 2 Self-and Cross-Feedback Control and Metering Circuits Test.
procedures in para 4-47 and 4-48 except as follows to ensure the SAS 2 self- and cross-feedback control
and metering circuits are operational.
(SW FO-1 for J7 pin pattern.)
a. Connect the test aid, jumper wires, and the 2,000 ohm 1 W 0.1% load resistor to the pins on recep-
tacle J7 instead of J1.
b. Set the SYSTEM SELECT switch to SAS 2.
c. Substitute SAS 2 controls, receptacles, and indicators for SAS 1 controls, receptacles, and indica-
4-51. SAS 2 Command Circuit Test. Repeat the procedures given in para 4-49 except as follows to
ensure the SAS 2 command circuit is operational.
(See FO-1 for Jl/J7 pin pattern.)
a. Set the SYSTEM SELECT switch to SAS 2.
b. Substitute SAS 2 controls, receptacles, and indicators for the SAS 1 controls, receptacles, and indi-
Before starting the BITE test, ensure test aid, jumper wires, and 2000
ohm resistors are removed from receptacles J1 and J7.
4-52. BITE Circuit Test. This test ensures the BITE circuit is operational.
a. Set the power switch to ON.
b. Set the SYSTEM SELECT switch to BITE.
c. Set the BITE switch, in turn, to each of the following positions. At each position, the DVM shall
indicate within the specified range.
-19 to -21
+19 to +21
-11.5 to -12.5
+11.5 to +12.5
+4.7 to +5.3
+12.9 to +13.l
Ensure all switches and controls are set to initial positions specified in
para 4-44 b. Leave SYSTEM SELECT switch in BITE.
d. Set No. 1 multimeter to measure ac volts. Connect it to receptacle pin J 1-4 and ground.
e. Set the BITE switch to SAS 1 SELF. No. 1 multimeter shall indicate 0.83 to 0.93 volts ac. The
DVM shall indicate 8.00 to 10.00 millivolts dc. Set SAS 1 FEEDBACK SELECT switch to CROSS.