AVR 370 (serv.man8) - Harman Kardon Audio Service Manual (repair manual). Page 10

English

AVR

Front-Panel Controls

Power indicator/Power button: the Avr has four different power modes:

•  Off (power indicator not illuminated): when the rear-panel main power switch is in 

the off position or the power cord is unplugged the Avr is off and will not respond to 

any commands. plugging the power cord into a live Ac outlet and setting the main 

power switch in the on position will put the Avr into the eco Standby mode.

•  Eco Standby (power indicator glows solid amber): the eco Standby mode minimizes 

energy consumption when you're not using the Avr. when the Avr is in eco Standby, 

it will not automatically turn on or play audio in response to an Airplay signal from 

a networked device. when the Avr is in eco Standby, pressing the power button 

turns it on. to put the Avr into eco Standby when it is on, press the power button 

for more than three seconds. note: the Avr will not automatically enter the eco 

Standby mode.

•  Standby (power indicator glows solid amber): the Standby mode mutes the Avr 

and shuts off its front-panel display, but allows the Avr to automatically turn on and 

play audio in response to an Airplay signal from a networked device. See Listening 

to Media via AirPlay, on page 

xx

, for more information. when the Avr is in Standby, 

pressing the power button turns it on. to put the Avr into Standby when it is on, press 

the power button for less than three seconds. note: the Avr will automatically enter 

the Standby mode whenever no control buttons have been pressed and no audio 

signal has been present for 30 minutes.

•  On (power indicator glows solid white): when the Avr is on it is fully operational.

IMPORTANT NOTE: If the protect message ever appears on the Avr’s front-

panel message display, turn off the Avr and unplug it from the Ac outlet. 

 

check all speaker wires for a possible short-circuit (the “+” and “–” conductors 

touching each other or both touching the same piece of metal). If a short-circuit is not 

found, bring the unit to an authorized harman kardon service center for inspection 

and repair before using it again.

Setup button: press this button to access the Avr’s main menu.
Info button: press this button to access the Avr’s Source submenu, which contains the 

settings for the source currently playing. use the up/down buttons to scroll through the 

different settings.
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.
IR sensor: this sensor receives infrared (Ir) commands from the remote control. It is 

important to ensure that the sensor is not blocked. If covering the Ir sensor is unavoidable 

(such as when the receiver is installed inside of a cabinet), connect an optional infrared 

receiver to the remote Ir In connector on the Avr’s rear panel.
Volume knob: turn this knob to raise or lower the volume.
Headphone jack/EzSet/EQ Mic input: connect a 1/4" stereo headphone plug to this 

jack for private listening. this jack is also used to connect the supplied microphone for 

the ezSet/eq procedure described in Configure the AVR For Your Speakers, on page 

xx

.

USB port: you can use this port to perform software upgrades that may be offered in the 

future. do not connect a storage device, peripheral product or a pc here, unless you are 

instructed to do so as part of an upgrade procedure.
HDMI (High-Definition Multimedia Interface

) Front Input connector: connect an 

hdmI-capable source component that will be used only temporarily, such as a camcorder 

or game console, here. 
Resolution button: press this button to access the Avr’s video output resolution setting: 

480i, 480p, 720p, 1080i, 1080p or 1080p/24hz. use the up/down and ok buttons to 

change the setting.

IMPORTANT NOTE: If you set the Avr’s video output resolution higher than 

the capabilities of the actual connection between the Avr and your tv or video 

display, you will not see a picture. If you are using the composite video connection 

from the Avr to your tv (see Connect Your TV or Video Display, on page 17), 

press the resolution button and use the up/down and ok buttons to change the 

resolution to 480i.

Audio Effects button: press this button to access the Audio effects submenu, which 

allows you to adjust the Avr’s tone controls and other audio controls. See Set Up Your 

Sources, on page 26, for more information.
Video Modes button: press this button for direct access to the video modes submenu, 

which contains settings you can use to improve the video picture. use the ok button 

to scroll through the different modes, and use the up/down and left/right buttons to 

make adjustments within each mode. See Set Up Your Sources, on page 26, for more 

information.
Surround Modes button: press this button to select a listening mode. the Surround 

modes menu will appear on screen, and the menu line will appear in the front-panel 

display. use the up/down buttons to change the surround-mode category and the left/

right buttons to change the surround mode for that category. See Set Up Your Sources, 

on page 26, for more information.
Back/Exit button: press this button to return to the previous menu or to exit the menu 

system.
Left/Right buttons: use these buttons to navigate the Avr’s menus.
OK button: press this button to select the currently highlighted item.
Up/Down buttons: use these buttons to navigate the Avr’s menus.
Source List button: press this button to select a source device to watch/listen to. use 

the up/down buttons to scroll through the source-device list, and press the ok button to 

select the source being displayed.