Harman Kardon AVR 7550HD Owner's Manual

Also see for AVR 7550HD: Worksheet Quick start guide Service manual

52TROUBLESHOOTING GUIDESYMPTOM CAUSE SOLUTIONUnit does not function when Main • No AC Power • Make certain AC power cord is plugged into a live outletPower Switch is turned on • Check whether outlet is switch-controlledDisplay lights, but no sound • Intermittent input connections • Secure all input and speaker connectionsor picture • Mute is on • Press Mute Button• Volume control is down • Turn up volume controlNo sound from any speaker; • Amplifier is in protection mode • Check speaker wires for shorts at receiver and speaker endsPROTECT message appears on due to possible shortfront panel • Amplifier is in protection mode • Contact your local Harman Kardon service centerdue to internal problemsNo sound from surround or • Incorrect surround mode • Select a mode other than Stereocenter speakers • Input is monaural • There is no surround information from mono sources• Incorrect configuration • Check speaker configuration• Stereo or Mono program material • The surround decoder may not create center- or rear-channelinformation from nonencoded programsUnit does not respond to • Weak batteries in remote • Change remote batteriesremote commands • Wrong device selected • Press the AVR Settings Button• Remote sensor is obscured • Make certain front-panel sensor is in line of sight of remoteor connect an optional remote sensorIntermittent buzzing in tuner • Local interference • Move unit or antenna away from computers, fluorescentlights, motors or other electrical appliancesSurround Back Speaker settings • Multizone system has been turned • Use the menu system to access the Zone 2 menu and reassigncannot be accessed, and test tone on, and the surround back channels the surround back channels to the main roomdoes not play through Surround were reassigned to multizoneBack Speakers operationThe XM Preview Channel (001) • XM antenna is not plugged in • Use an XM antenna module designed for use with XM Ready homeis silent audio equipment, and plug the module into the XM Radio Jack• XM antenna is not located in such • The XM antenna module needs an unobstructed view of thea way as to enable reception southern sky, or to be within range of an XM terrestrial repeater;if necessary, purchase an extension cable from your XM Radio dealer• XM signal requires a refresh • Visit www.xmradio.comUnable to activate Program mode • AVR Settings Button not held for at • Follow the instructions in the remote’s LCD Displayon remote least 3 secondsRemote buttons light, but AVR does • Remote is in Zone 2 mode • Slide the Zone Switch at the bottom of the remote to thenot respond Zone 1 positionUnable to play Internet Radio • AVR is not able to access the Internet • Make sure the Network Jack is connected to an active router;navigate to the Network Settings submenu in the System Setupmenu and change the Network Settings line to “Manual”; contactyour ISP to obtain the correct information for the other settings inthis submenuUnable to access content on PC • Content not in proper format • Only content in the form of MP3, WMA and JPEG files may be sharedfrom Network source with the AVR• Content has not been shared by • Network device must be running compatible software; network devicenetwork device must be programmed to share the content over the network; refer tothe Network Playback section on page 37 for detailsAdditional information on troubleshooting possible problems with your AVR 7550HD, or installation-related issues, may be found in the list of “FrequentlyAsked Questions”, which is located in the Product Support section at www.harmankardon.com.