AVR 660 (serv.man3) - Harman Kardon Audio Service Manual (repair manual). Page 10

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9
ENGLISH
REAR-PANEL CONNECTIONS
6-/8-Channel 
Inputs
Optical 1, 2 & 3 
Digital Audio
Coaxial Digital 
Audio Output
Network
Trigger Outputs  
1 & 2
Remote IR 
Output
Coaxial 1, 2 & 3 
Digital Audio
Analog 4 
Outputs
Preamp 
Outputs
Subwoofer 1 
Output
Subwoofer 2 
Output
(AVR 760 only)
Composite 
1, 2 & 3
Zone 2 Video 
Output
Surround 
Back/Zone 2 
Speaker 
Outputs
FM Antenna
AM Antenna
Zone 2  
Audio Outputs
The Bridge II
S-Video 2  
Output
Center Speaker 
Outputs
Fan Vents
Surround 
Speaker 
Outputs
Front 
Speaker 
Outputs
A-BUS 
Port
Optical Digital 
Audio Output
HDMI 1, 2, 3 & 4
HDMI Monitor 
Output
RS-232 Port
Zone 2 
IR Input
Remote IR 
Input
Carrier IR 
Output
Video Monitor 
Outputs
Analog 1-5 
Inputs
Analog 3 
Outputs
Component Video 
Monitor Outputs
Component  
1, 2 & 3
Switched AC 
Accessory Outlet
AC Power  
Input
S-Video 
1, 2 & 3
6-/8-Channel Inputs: Connect the multichannel analog audio outputs 
of a non-HDMI player (DVD-Audio, SACD™, Blu-ray Disc™ or HD-DVD, or any 
other external decoder) to these jacks.
Coaxial 1/2/3 and Optical 1/2/3 Digital Audio Inputs: If a source 
has a compatible digital audio output, and if you are not using an HDMI 
connection for audio for the device, connect it to one of these jacks to hear 
digital audio formats, such as Dolby Digital, DTS and linear PCM. Use only one 
type of digital audio connection for each source.
Coaxial and Optical Digital Audio Outputs: If a source is also an 
audio recorder, connect one of the Digital Audio Outputs to the recorder’s 
matching input for improved recording quality. Only PCM digital audio signals 
are available for recording. Both coaxial and optical digital audio signals are 
available at either Digital Audio Output.
Network Jack: Plug in an RJ-45-compatible cable that connects to a 
personal computer (PC), router or Internet access. When connected to a PC, 
the AVR 760/AVR 660 is capable of playing audio and JPEG files stored on the 
PC. When connected to the Internet, the AVR 760/AVR 660 may be used to 
enjoy Internet Radio. See pages 33 and 34 for more information.
RS-232 Serial Port: This bi-directional port may be used to control 
the AVR 760/AVR 660 using an RS-232 serial control link to a compatible 
computer or programmable remote control system. Due to the complexity of 
programming RS-232 commands, connections and programming for control 
purposes should be performed by a qualified custom installer.
Trigger 1 and 2 Outputs: Connect these control jacks to the trigger 
input jack of an external component, such as an audio power amplifier, that 
you want to power on any time the AVR 760/AVR 660 is turned on, without 
using the AVR’s Switched Accessory Outlet for power. When this connection 
is used, the AVR 760/AVR 660 will automatically send a low-voltage signal to 
the connected device that triggers it to turn on when the AVR 760/AVR 660 
is on, and off when the AVR 760/AVR 660 is placed in the Standby Mode. The 
connected component must respond to 6-volt presence as the control signal.
The Trigger 2 Output may be programmed to transmit its signal only when 
certain of the AVR’s source inputs are selected. For example, to lower a screen 
when watching a DVD movie, but not while listening to the tuner, connect 
the Trigger 2 Output to the screen and program it to be on when the DVD 
source is selected, but off when the AM or FM bands are in use. See the Initial 
Setup section for more information on programming this setting in the Info 
Settings menus for each source.
Zone 2 Infrared (IR) Input: Connect a remote IR receiver located in the 
remote zone of a multizone system to this jack to control the AVR (and any 
source devices connected to the Remote IR Output) from the remote zone.
Remote Infrared (IR) Input and Output: When the remote IR 
receiver on the front panel is blocked, connect an optional IR receiver to the 
Remote IR Input jack. The Remote IR Output may be connected to the Remote 
IR Input of a compatible product to enable remote control through the AVR. 
Remote IR Carrier Output: This output is similar in function to the 
Remote IR Output, with the difference that this jack outputs the full infrared 
signal as received by the AVR’s IR sensor or the Remote IR Input, while 
the Remote IR Output jack outputs a “stripped” signal that has no carrier 
frequency. 
Component  
1, 2 & 3
A-BUS Power Input
Harman Kardon
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