TM 55-4920-429-13
Table 2-1. Test Set Controls and Indicators — Continued
CONTROI/INDICATOR
DESCRIPTION
HYDR VALVE switch S9
Switch, toggle, 2-position.
Controls AFCS hydraulic shutoff valve that supplies hydraulic pressure to
the pitch, roll, and yaw extensible link servo valves.
PITCH/ROLL/YAW MONITOR
SELECT switch S15
DRIVE/FDBK MONITOR SELECT
switch S14
CPT MONITOR Switch
CPT MONITOR switch S16
SELF TEST Group
SELF TEST switch S17
OPEN. Switch applies 28 vdc.
CLOSE. 28 vdc is removed.
Switch, rotary, 3-position.
Selects servo-loop circuit for display of drive and feedback signal values
on multimeter.
At PITCH, pitch axis signals are connected for display.
At ROLL, roll axis signals are selected for display.
At YAW, yaw axis signals are selected for display.
Switch, rotary, 5-position.
Selects test points, drive or feedback signals for axis selected by PITCH/
ROLL/YAW MONITOR SELECT switch for monitoring by the meter.
(Refer to notes 1 & 2.)
DRIVE RTN. Level of extensible link drive return voltage is
displayed.
DRIVE HI. Level of extensible link drive voltage is displayed.
FDBK SELF. Level of extensible link self feedback voltage is
displayed.
FDBK SUM 1. Level of extensible link summed feedback voltage at
pin J1-N is displayed.
FDBK SUM 2. Level of extensible link summed feedback voltage at
pin J1-L is displayed.
Single switch used in conjunction with CPT MONITOR position of
METER SOURCE switch.
Switch, rotary, 3-position.
Selects position signals from control position transducers.
LATERAL. Selects lateral stick position signal from lateral cpt
for display.
LONGITUDINAL . Selects longitudinal stick position signal
from longitudinal cpt for display.
DIRECTIONAL. Selects pedal position signal from directional
cpt for display.
Switch, rotary, 16-position.
Selects test or monitor functions from internal circuitry of tester.
OFF. No self-test function.
LAMPS. Provides 28 vdc lamp test return. Lights STATUS A and
STATUS B indicator lights and meter DC, AC, and K-OHMS indica-
tor lights.
2-9
