Harman Kardon AVR 7550HD Owner's Manual

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

34OPERATIONThe average home audio speaker sensitivity is 88dB SPL (8 ohms,1 watt, 1 meter). Check the sensitivity specification for your loud-speakers, found in the owner’s manual or on the manufacturer’sWeb site. If your speakers have a sensitivity rating greater than88dB SPL, increase Calibration Offset by the difference betweenyour speakers’ sensitivity and 88dB. If they have a sensitivity ratingof less than 88dB SPL, decrease Calibration Offset by the differencebetween your speakers’ sensitivity and 88dB.To adjust the Calibration Offset, press the AVR Settings Button andscroll to the System Setup menu, then select it. Scroll to the DolbyVolume Calibration line, which defaults to 0dB. Use the 7/3 Buttonsto adjust the setting within the range of –10dB to +10dB.MUTE FUNCTIONTo temporarily mute all speakers and the headphones, press theMute Button on the remote. Any recording in progress will notbe affected. The MUTE message will appear in the display as areminder. To restore normal audio, press the Mute Button again,or adjust the volume. Turning off the AVR will also end muting.SLEEP TIMERThe sleep timer sets the AVR to play for up to 90 minutes and thenturn off automatically.Press the Sleep Settings Button on the remote, and the timeuntil turn-off will be displayed. Each additional press of the SleepButton decreases the play time by 10 minutes, with a maximumof 90 minutes. The SLEEP OFF setting disables the sleep timer.When the sleep timer has been set, the front-panel display willautomatically dim to half-brightness and the Volume Control willgo dark.If you press the Sleep Button after the timer has been set, theremaining play time will be displayed. Press the Sleep Button againto change the play time.AUDIO EFFECTSAdjust the Dolby Volume setting, tone controls, LFE trim or equal-ization, or select a speaker configuration to improve performance.Access these settings from the Audio Effects submenu, as describedin the Advanced Functions section.It is recommended that you leave the settings at their default valuesuntil you are more familiar with your system.VIDEO MODESThe settings in the Video Modes menu are used to fine-tune thepicture, if necessary, after making all adjustments on the video dis-play. It is recommended that you leave the settings at their defaults.See the Advanced Functions section for detailed information.HEADPHONESPlug the 1/4"-inch plug on a pair of headphones into the jackbehind the front-panel door for private listening. The defaultDolby Headphone bypass mode delivers a conventional 2-channelsignal to the headphones.Press the Surround Modes Button on the front panel or the remote,to switch to Dolby Headphone virtual surround processing, whichemulates a 5.1-channel speaker system. No other surround modesare available for the headphones.SOURCE SELECTIONPress the front-panel Source List Button. Use the 1/5Buttonsto scroll through the sources. Using the on-screen menus, pressthe AVR Settings Button, highlight “Source Select” and press theOK Button. Scroll to the desired source in the slide-in menu andpress the OK Button.For direct access to any source, press its Source Selector onthe remote. To directly select Source A, B, C or D, first press theAVR Settings Button, then press the appropriate Soft Key: red forSource A, green for Source B, yellow for Source C or blue forSource D. When using the Zone 2 remote, make sure to connectthe Zone 2 Video Output to a display in the remote zone, andselect these sources using the on-screen menu system.The AVR selects the audio and video inputs assigned to the source,and any other settings made during setup.The source name, the audio and video inputs assigned to thesource, and the surround mode will appear on the front panel.The source name and surround mode will also appear on screen.VIDEO TROUBLESHOOTING TIPS:If there is no picture:• Check the source selection and video input assignment.• Check the wires for a loose or incorrect connection.• Check the video input selection on the display device (TV).• Press the front-panel Resolution Button and use the1/5Buttons until the correct video output resolution isselected and a picture appears. The CANCEL message willappear. Press the 5Button to view the ACCEPT option, thenpress the OK Button.Additional Tips for HDMI Connections:• Turn off all devices (including the TV, AVR and any sourcecomponents).• Unplug the HDMI cables, starting with the cable betweenthe TV and AVR, and continuing with the cables betweenthe AVR and each source device.• Carefully reconnect the cables from the source devices tothe AVR. Connect the cable from the AVR to the TV last.• Turn on the devices in this order: TV, AVR, source devices.USING THE TUNERTo select the AVR 7550HD’s built-in tuner:1. Press the Source List Button on the front panel. Use the 1/5Buttonsto scroll to the desired tuner band.2. Press the Radio Source Selector on the remote. Press it againto switch bands (AM, FM or XM).A screen similar to the one shown in Figure 25 will appear.The XM band uses a different screen.