TM 9-2350-238-10
OPERATION OF AUXILIARY EQUIPMENT–CONTINUED
OPERATING COMMUNICATIONS EQUIPMENT
The AM-1780/VRC is master control for inter-
com system. Nothing works until both
driver’s MASTER switch and AM-1780/VRC
are turned on.
Before starting vehicle engine,
make certain MAIN PWR switch
(1) is off. Otherwise, engine
start could damage AM-1780/
VRC.
1 With vehicle power on, set MAIN PWR
switch (1) to lNTercom ONLY and
POWER CKT BKR switch (2) to ON posi-
tion. POWER lamp (3) should light.
2 Leave INT ACCENT switch (4) at OFF,
RADIO Transmission switch (5) at
LISTENING SILENCE and INSTALLATION
SWITCH (6) at lNTercom ONLY.
The following procedures explain how to
operate control box C-2298/VRC.
Position of CVC helmet switch
FORWARD
MIDDLE
REARWARD
RAD
(won’t lock)
LISTEN
(locks)
2-103
