Table 4-1. Multiplexer Set Controls and Indicators (Cont)

T.O. 31W2-2GSC24-2

TM 11-5805-688-14-1

NAVELEX 0967-LP-545-3011

Controls/Indicators

Function

TEST CONTROL group (Cont)

DISPLAY RESET switch

When pressed, extinguishes all lighted

indicators except POWER CONTROL ON

indicator.

FAULT LOCATION group

MULTIPLEXER CARD indicator

Lights when a multiplexer card malfunction

is detected. Remains lighted until reset.

MULTIPLEXER OUT OF TOL indicator

Lights when an out-of-tolerance condition

is detected on one or more input channels.

DEMULTIPLEXER CARD indicator

Lights when a demultiplexer card malfunction

is detected. Remains lighted until reset.

FAULT LOCATION numerical display

Functions are as follows:

a) When MULTIPLEXER CARD or DEMULTIPLEXER CARD

indicator is lighted, displays numerical location of

malfunctioning card.

b) When MULTIPLEXER OUT OF TOL indicator is lighted,

displays number of channel that is out of tolerance. When

two or more channels are out of tolerate at the same time,

displays number of these channels sequentially.

c) When SELF TEST switch is in on (up) position and no

malfunction exists, displays 00. When SELF TEST switch is

in on (up) position and a malfunction exists, displays

numerical location of card whose diagnostic circuits are

malfunctioning.

4-3