Harman Kardon AVR 745 Service Manual page 11

AVR745
Preamp Outputs: Connect these jacks to an
optional, external power amplifier for applications
where higher power is desired.
Main Subwoofer Output: Connect this jack
to the line-level input of a powered subwoofer. If an
external subwoofer amplifier is used, connect this jack
to the subwoofer amplifier input. If only one subwoofer
is used in your system, connect it here.
Tape Outputs: Connect these jacks to the
Record/Input jacks of an audio recorder.
A-BUS Connector: Connect this jack to optional
A-BUS ® -certified products to extend the multiroom
capabilities of your AVR 745. See page 17 for more
information on A-BUS.
Tape Inputs: Connect these jacks to the Play/Out
jacks of an audio recorder.
Surround Speaker Outputs: Connect these out-
puts to the matching + and – terminals on your sur-
round channel speakers. In conformance with the CEA
color-code specification, the blue terminal is the posi-
tive (+) terminal that should be connected to the red
(+) terminal on the Surround Left speaker with older
color-coding, while the gray terminal should be con-
nected to the red (+) terminal on the Surround Right
speaker with the older color-coding. Connect the black
(–) terminal on the AVR to the matching black nega-
tive (–) terminals for each surround speaker. (See
page 15 for more information on speaker polarity.)
CD Audio Inputs: Connect these jacks to the
left/right analog audio output of a compact disc player
or CD changer or other audio source.
Front Speaker Outputs: Connect these outputs
to the matching + or – terminals on your left and right
speakers. When making speaker connections, always
make certain to maintain correct polarity by connecting
the color-coded (white for front left and red for front
right) (+) terminals on the AVR 745 to the red (+)
terminals on the speakers and the black (–) terminals
on the AVR 745 to the black (–) terminals on the
speakers. See page 15 for more information on
speaker polarity.
Multiroom Audio Outputs: Connect these jacks
to the optional external audio power amplifier and
video distribution system that delivers the source
selected for multizone distribution.
Subwoofer 2 Output: If your system has two
subwoofers, connect one to Main Subwoofer Output
, and connect the line level input of a second sub-
woofer to this jack.
REAR-PANEL CONNECTIONS
Fan Vents: These ventilation holes are the output
of the AVR 745's airflow system. To ensure proper
operation of the unit and to avoid possible damage to
delicate surfaces, make certain that these holes are
not blocked and that there is at least 3 inches of open
space between the vent holes and any wooden or fab-
ric surface. It is normal for the fan to remain off at
most normal volume levels. An automatic temperature
sensor turns the fan on only when it is needed.
Full Carrier IR Output: The output of this jack
is the full signal received at the Remote Sensor
Window ^ or input through the IR Input
ing the carrier frequency that is removed from signals
at the IR Output . Use this output to extend IR
remote signals to the input of compatible products by
direct connection or through the use of optional, exter-
nal IR "blasters". If you are in doubt as to which of the
two IR Output jacks to use, we recommend that you
consult with your dealer or installer, or check with the
manufacturer of the external equipment you wish
to control.
IR Output: This connection permits the IR sensor
in the receiver to serve other remote controlled
devices. Connect this jack to the "IR IN" jack on com-
patible Harman Kardon equipment.
Center Channel Speaker Outputs: Connect
these outputs to the matching + and – terminals on
your center channel speaker. In conformance with the
CEA color-code specification, the green terminal is the
positive (+) terminal that should be connected to the
red (+) terminal on speakers with the older color-cod-
ing. Connect the black (–) terminal on the AVR to the
black negative (–) terminal on your speaker. (See
page 15 for more information on speaker polarity.)
Surround Back/Multiroom Speaker Outputs:
These speaker terminals are normally used to power
the surround back left/surround back right speakers
in a 7.1-channel system. However, they may also be
used to power the speakers in a second zone, which
will receive the output selected for a multiroom system.
To change the output fed to these terminals from
the default of the Surround Back speakers to the
Multiroom Output, you must change a setting in the
Advanced Menu of the OSD system. See page 51 for
more information on configuring this speaker output.
In normal surround system use, the brown and black
terminals are the surround back left channel positive
(+) and negative (–) connections and the tan and
black terminals are the surround back right positive
(+) and negative (–) terminals. For multiroom use,
connect the brown and black SBL terminals to the
red and black connections on the left remote zone
speaker and connect the tan and black SBR terminals
to the red and black terminals on the right remote
zone speaker.
11
IR Input: If the AVR 745's front-panel IR sensor
is blocked due to cabinet doors or other obstruc-
tions, an external IR sensor may be used. Connect
the output of the sensor to this jack.
Switched AC Accessory Outlet: This outlet may
be used to power any device you wish to have turned
on when the AVR 745 is turned on with the Standby/
On Switch 1.
IMPORTANT NOTE: The power consumption of any
device connected to the accessory outlet should not
exceed 100 watts. Never connect high-power devices
includ-
such as amplifiers or video displays to the accessory
outlet.
Trigger 1 Output: Connect this jack to the
"Trigger In" jack of an optional external component
such as an audio power amplifier that you want to be
controlled to mirror the power state of the AVR 745.
When this connection is used, the AVR 745 will auto-
matically send a low-voltage signal to the connected
device that turns it on when the AVR 745 is on and off
when the AVR 745 is placed in the Standby Mode.
The connected component must respond to 6-volt
presence as the control signal.
Trigger 2 Output: Connect this jack to the
"Trigger In" jack of an optional, external component
such as a projection screen or motorized blinds that
you want to turn on or off in response to the power
state of the AVR 745, but only when certain inputs are
selected. (For example, lower a screen when a Video
related mode is selected, but not for the tuner or a CD
player.) For the 5-volt control signal to be sent to the
jack for device control, you must activate the appropri-
ate setting in PAGE 2 of the IN/OUT
SETUP menu. See page 23 for more information.
AC Power Cord Socket: Connect the AC power
cord here when the installation is complete. To ensure
safe operation, use only the power cord supplied with
the unit. If a replacement is required, it must be of the
same type and capacity.
RS-232 Port: This jack may be used to control
the AVR 745 over a bi-directional RS-232 serial
control link to a compatible computer or programmable
remote control system. Due to the complexity of
programming RS-232 commands, we strongly
recommend that connections to this port for
control purposes be made by a trained and qualified
technician or installer.
Multiroom Video Output: Connect this jack to
the cable and/or optional, external video distribution
system that delivers the video source selected for mul-
tizone distribution to remote rooms. Only composite
video is available.
REAR-PANEL CONNECTIONS
harman/kardon
9