AM - 1780 CONTROLS AND USES

TM 11 -5820-890-10-8

AM - 1780 CONTROLS AND USES

CONTROLS

PURPOSE

POWER CKT BKR

A two-position ON/OFF switch allows the user to initiate and terminate

(Circuit Breaker)

power to the VIC system.

ON/OFF

Supplies power to and removes power from crew boxes (C-2297 and

C-2298).

MAIN PWR

This switch provides three power settings: normal, intercom only, and OFF.

(Main Power)

OFF

Removes all power from the VIC and radio system.

INT ONLY

Allows communications among crewmembers, but does not allow use of

radios.

(Intercom Only)

NORM

Supplies power to intercom and radios and is the normal position used

for VIC.

(Normal)

INT ACCENT

When ON, this switch reduces the volume level of radio traffic; intercom

volume level remains unchanged.

(Intercom Accent)

RADIO TRANS

This switch allows selection of transmit capabilities or listening silence.

(Radio Transmission)

CDR+CREW

Allows all crewmembers to transmit on radios.

CDR ONLY

Allows commander only to transmit on radios.

LISTENING SILENCE

Prevents transmission on radios.

INSTALLATION

This three-position switch is for use of maintenance personnel only.

Crewmembers should not move switch setting.

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