Yamaha XMV4280 Owner's Manual page 12

Controls and Functions
@3 [SPEAKERS] output connectors
These are barrier strip type speaker output connectors. For
details on how to make connections to a barrier strip, refer to
the "Setup" section entitled "Connecting the speaker output
connectors" (page 15).
@4 [REMOTE] connector
This is a Euroblock 3-pin connector that allows muting/
unmuting of all channels and power-on/standby to be con-
trolled remotely. For details, refer to "Using and connecting
the [REMOTE] connector and [FAULT OUTPUT] connec-
tor" (page 18).
@5 [FAULT OUTPUT] connector
This is a Euroblock 3-pin connector that allows an external
device to be controlled when a fatal malfunction occurs in
this unit. NC and C will be shorted when the amplifier is
operating normally; NO and C will be shorted when a prob-
lem occurs (page 18).
If a problem occurs, the [PROTECTION] indicator will
light.
@6 [AC IN] socket
Connect the supplied AC power cord here. First connect the
AC power cord to the socket on the rear panel of this unit,
then plug it into an appropriate AC power outlet.
CAUTION
Before connecting or disconnecting the power cord,
make sure that the power to the unit is turned OFF.
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XMV4280/XMV4140 Owner's Manual