Table 2-1. Controls, Indicators and Connectors

TM 9-4931-378-13&P

Table 2-1. Controls, Indicators and Connectors - Continued

Control, Indicator

Fig. 2-1

Function

or Connector

Index No.

Enables CPU self test.

CPU TEST two position

toggle switch S2

Displays parity of all 64 bits of data.

PARITY FLR indicator DS9

Simulates LAI Fail discrete signal of EPU.

LAI FLR two-position

toggle switch S3

Simulates LAI Fail flag. Illuminates when LAI Fail

ADS FLR indicator DS10

signal is received from EPU.

Simulates Radar Altimeter Reliability signal

RDR ALT RELBL two-position

to EPU.

toggle switch S4

Illuminates when ADS NO GO signal is received

ADS NO GO indicator DS11

from EPU.

Enables power to indicators DS1 through DS12

SELF TEST two-position

for lamp check. DS12 is programmed to display 888.

toggle switch S5

OUTPUT SEL 2

14-position rotary switch

Specific Function

Sw Pos

S10

Selects the LAI + 15 Vdc output

LAI + 15V

of the EPU for monitoring.

Selects the LAI 15 Vdc output

LAI - 1 5 V

of the EPU for monitoring.

Selects the fore-aft TAS signal

output of the EPU for monitoring.

Selects the lateral TAS signal

outputs of the EPU for monitoring.

Selects the vertical TAS signal

output of the EPU for monitoring.

Selects the fore-aft IAS signal

output of the EPU for monitoring.

Selects the lateral IAS signal

output of the EPU for monitoring.

Selects the static pressure output

of the EPU for monitoring.

Selects the differential pressure output

(total pressure less static pressure)

for EPU monitoring.

Selects the EPU +5 Vdc output of the

EPU for monitoring.

INJV

Selects the EPU injection voltage output

of the EPU for monitoring.

+15V

Selects the EPU +15 Vdc output of the

EPU for monitoring.

2-2