Table 2-1. Operator's Controls. (cont)

TM 1-6625-735-14

Table 2-1.

Operator's Controls. (Cont)

CONTROL, INDICA-

TOR, TEST POINT, OR

CONNECTOR

FUNCTION

PWR GND Test Point

Provides a ground reference point for monitoring power voltages. To minimize

undesirable effects of ground loops, power ground reference is received

through test set connector priority switching arrangements as follows:

Connectors Used

Power Excitation

Received From

J1, J2, J3

J1 and J2

SIG GND Test Point

Provides a ground reference point for monitoring signal voltages. Signal

ground reference is established at test set power supply and is made common

to power ground through helicopter wiring.

LAMP TEST

LAMP TEST Button

Provides test set lamps with press-to-test capability. When pressed, all STABI-

LATOR SYSTEM INDICATORS go on and SAS SYSTEM ENGAGE 1 and

2 indicators and AIRSPEED SWITCH 60 KNOTS indicator go on. 28 VDC

STAB 1 power is used to turn on STABILATOR SYSTEM INDICATORS

and 28 VDC SAS power is used to turn on SAS SYSTEM indicators.

STABILATOR SYSTEM

SCALING AMPL

Provides capability for simulating or monitoring signal output from No. 1

Simulator

and/or No. 2 stabilator amplifier - scaling amplifier. Used for testing No. 1 and

No. 2 stabilator amplifier - scaling amplifier commands for automatic mode

operation.

NO. 1 SNSR Test Point

Provides monitoring capability for signal output from scaling amplifier in No.

1 stabilator amplifier. When NO. 1 mode selector control is at NORM, NO. 1

SIM test point is connected to NO. 1 SNSR test point.

NO. 1 SIM Test Point

Provides monitoring capability for SCALING AMPL simulator signal selected

by NO. 1 DN/UP control when NO. 1 mode selector control is at SIM. Pro-

vides monitoring capability for ground supplied to driver logic module in No.

1 stabilator amplifier when NO. 1 mode selector control is at GND. When NO.

1 mode selector control is at NORM, NO. 1 SIM test point is connected to

NO. 1 SNSR test point to provide monitoring capability for signal output from

scaling amplifier in No. 1 stabilator amplifier.

2-9