AVR 660 (serv.man3) - Harman Kardon Audio Service Manual (repair manual). Page 9

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8
FRONT-PANEL CONTROLS
KLM N
 Navigation: These buttons are used to navigate the AVR’s 
menus, including the menus for the tuner, the USB device, The Bridge II, the 
Network and Internet Radio.
OK: Press this button to select the currently highlighted item.
Headphone Jack: Plug a 1/4" stereo headphone plug into this jack for 
private listening. 
USB Port: Connect a USB flash drive, to play audio files in the MP3 or WMA 
format or still images in the JPEG format. DO NOT connect a PC, keyboards, 
pointing devices or other peripheral products to the AVR 760/AVR 660. Do not 
connect an iPod here; use The Bridge II instead. Do not connect a USB hub or 
multi-card device.
Digital Audio, Video and Analog Audio Front Inputs: Connect a 
source component that will only be used temporarily, such as a digital camera 
or game console, to these jacks. Use only one type of audio and one type of 
video connection.
Note: The AVR’s menus refer to these jacks as the Optical Front, Coaxial 
Front, Composite Front, S-Video Front and Analog Front inputs. 
EzSet/EQ II Microphone Input: This jack is used to connect the 
supplied microphone for the EzSet/EQ II procedure described in the Initial 
Setup section. 
Volume Knob: Turn this knob to raise or lower the volume.
Message Display: Various messages appear in this two-line display 
in response to commands and changes in the incoming signal. In normal 
operation, the current source name appears on the upper line, while the 
surround mode is displayed on the lower line. When the on-screen display 
menu system (OSD) is in use, the current menu settings appear.
Remote IR Sensor: This sensor receives infrared (IR) commands from the 
remote control. It is important to ensure that it is not blocked. If covering 
the sensor is unavoidable, use an optional Harman Kardon HE 1000, or other 
infrared receiver, connecting it to the Remote IR Input on the AVR 760/
AVR 660’s rear panel.
AVR 660 -760, 230V Service Manual
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