Harman Kardon AVR 745 Owner's Manual page 19

29510_AVR745_Engelsk 30/10/06
Installation and Connections
No further installation or adjustment is needed,
as the A-BUS connector on the AVR routes the
signals in and out of the keypad to their proper
destination for power, signal source and control.
The output fed to the A-BUS jack is determined
by the AVR's multiroom system, and the menus
may be used as is.
RS-232 Connections
The AVR is equipped with an RS-232 Serial
Connection Port that may be used for two
purposes. When the port is connected to a com-
patible, optional, external computer, keypad or
control system the AVR is capable of bi-direction-
al communications that enable the external sys-
tem to control the AVR, and for the AVR to report
status and handshake data back to the controller.
Use of the RS-232 port for this type of control
requires specific technical knowledge, and we
recommend that any connection and program-
ming for control be made by a trained installer or
technician familiar with the equipment being
used. The RS-232 port may also be used as an
access point through which the AVR's operating
system and surround mode memories may be
updated via connection to a compatible comput-
er. At the time that any upgrade is available,
instructions for making the connection and
installing the upgrade will be available through
the Product Support area of the Harman Kardon
Web site at www.harmankardon.com.
The physical connection to the AVR's RS-232 port
is a standard D-9 connection but to assure com-
patible and proper operation, specific software
commands and pin wiring schemes may be
required.
USB Connections
The AVR 745 is one of the few A/V receivers to
offer a USB connection that may be used for
both playback of compatible audio content from
a computer and for loading of system updates
(when available).
The physical connection between a computer and
the AVR is a simple one, requiring only a cable
with a USB "A" type connector on one side and a
USB "Mini B" on the other. If you do not need
the USB cable provided with the AVR 745 for
programming the TC 30 remote, it may be used
for this purpose.
Connect the larger, "A" connector on the cable to
your computer or a USB hub and the end with
the "Mini" USB connector to the USB Jack
on the AVR's rear panel.
9:31 Side 19
NOTES ON USB:
• The USB jack on the AVR 745 is for connection
to a computer, or to a hub connected to a com-
puter, only. DO NOT connect it directly to other
devices such as card readers, USB memory stor-
age devices, external hard drives, USB acces-
sories, digital cameras or cellular phones.
Connection to these devices may cause dam-
age to the device and/or the AVR that is not
covered by the AVR's warranty.
• The AVR 745's USB connection may only be
used for audio playback and system upgrades.
It may not be used for other purposes, such as
system control, video or still-image playback.
Trigger Jack Connection
The AVR 745 is equipped with two low-voltage
Amp Trigger Jacks
activate optional, external power amplifiers,
screen motors, motorized blinds or other compat-
ible products that may be part of a home theater
installation. Once the connections are made,
operation is seamless in that the low-voltage
control signal is sent to the screen, blinds or
other device when the AVR 745 is turned on, and
it is turned off along with the AVR. Due to the
complexity of interfacing with power-con-
trolled devices, we strongly recommend
that the installation be done by a quali-
fied installer.
The AVR 745's trigger jacks are 3.5mm mono
mini plugs that delivers a 5-volt DC signal to the
center pin ("tip") of the plug (+) with the outer
shaft ("ring") of the plug as the negative (–) or
ground connection.
AC Power Connections
This unit is equipped with two accessory AC
outlets. They may be used to power accessory
devices, but they should not be used with high-
current draw equipment such as power ampli-
fiers. The total power draw to the Switched
Outlet
The Switched
when the unit is on completely. This is recom-
mended for devices that have no power switch or
a mechanical power switch that may be left in
the "ON" position.
NOTE: Many audio and video products go into a
Standby mode when they are used with switched
outlets, and cannot be fully turned on using the
outlet alone without a remote control command.
that may be used to
The AVR features a removable power cord that
allows wires to be run to a complex installation
so that the unit, itself, need not be installed until
it is ready for connection. When all connections
described above have been made, connect the
AC Power cord to the AC Power Cord Jack
The AVR draws significantly more current than
other household devices such as computers that
use removable power cords. For that reason, it is
important that only the cord supplied with the
unit (or a direct replacement of identical capa-
city) be used.
Once the power cord is connected, you are
almost ready to enjoy the AVR's incredible power
and fidelity!
INSTALLATION AND CONNECTIONS 19
must not exceed 100 watts.
outlet will receive power only
.