Harman-Kardon AVR 745 RS-232Connections, USB Connections, Notes On Usb, Trigger Jack Connection

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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.

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 that may be used to 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 must not exceed 100 watts.

The Switched outlet will receive power only 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.

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!

ENGLISH

INSTALLATION AND CONNECTIONS 19