TM 11-5820-890-10-3
OPERATION WITH EXTERNAL EQUIPMENT Continued
VIC SYSTEM (Intercommunication Set ANIVIC1(V)). The VIC system provides control of power to crewmember control
boxes and the radios. The amplifiers also amplify and control the audio signals. The main junction box (AM1780/VRC)
has ten cable connectors used to connect to control boxes and an RT or RCU. It has four selector switches, one circuit
breaker, one power indicator, two sets of binding posts and an audio amplifier. Four connectors are used to connect
control boxes.
Connector J504 is always used for the commander’s control box. Crewmember control boxes are connected to J505,
J506, or J507. Three RT or RCU can be connected to the main junction box. The main junction box and control boxes
can be used with a radio or RCU mounted in either a mounting adapter or power supply adapter. Refer to the following
applicable cabling diagrams. For control box C2298/VRC and main junction box switch settings, refer to page 4-19.
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