TM 55-4920-429-13
Table 2-1. Test Set Controls and Indicators — Continued
CONTROL/lNDICATOR
DESCRIPTION
CCDA CLUTCH switch S6
CCDA BRAKE switch S7
FEEDBACK MONITOR switch S11
Switch, toggle, 2-position.
Controls CCDA clutch.
ON. Applies 28 vdc to energize clutch and brake (independent of
CCDA BRAKE switch).
OFF. Voltage is disconnected.
Switch, toggle, 2-position.
Controls ccda brake.
ON. Applies 28 vdc to energize brake.
OFF. Voltage is disconnected.
Switch, rotary, 3-position.
Selects feedback signals from position devices for CCDA, DASH, and
LCT actuators for monitoring by the meter (position of actuator is indi-
cated by polarity and magnitude of feedback-voltage reading on meter).
CCDA. Ac feedback voltage from CCDA actuator is measured.
DASH. Dc feedback voltage from DASH actuator is measured.
LCT. Dc feedback voltage from LCT actuator is measured.
DISCRETE SIGNAL MONITOR Group
Three switches used in conjunction with DISCRETE SIGNAL MONI-
TOR position of METER SOURCE switch.
SEL l/OFF/SEL 2 switch S22
Switch, toggle, 3-position.
Selects input signals for monitoring. Selected signal can also be moni-
tored on the multimeter.
At SEL 1, signal from SIGNAL SEL 1 switch is selected for monitoring
by A and B STATUS indicators.
At SEL 2, signal from SIGNAL SEL 2 switch is selected for monitoring
by A and B STATUS indicators.
At OFF, STATUS indicators are inhibited from lighting.
SIGNAL SEL 1 switch S23
Switch, rotary, 9-position.
Selects discrete input signals for display when SEL l/SEL 2 switch is at
SEL 1.
RDR ALT ENGAGED. Signal from AFCS panel is displayed.
BARO ALT ENGAGED. Signal from AFCS panel is displayed.
HDG ENGAGE ON. Signal from AFCS panel is displayed.
L LDG GEAR ON GND. Signal from proximity switch is displayed.
CYCLIC MAG BRK ON. Signal from CENTERING DEVICE
RELEASE switch is displayed.
CLTV MAG BRK ON. Signal from THRUST CONTROL MAG
BRAKE TRIGGER switch is displayed.
AFCS ENGAGE ON. Signal from AFCS panel is displayed.
SWIVEL LOCKED. Signal from power STEERING control panel is
displayed.
R LDG GEAR ON GND. Signal from proximity switch is displayed.
NOTE:
All input signals to SIGNAL SEL 1 switch are processed
through the DISCRETE SIGNAL MONITOR before being
displayed.
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