39OPERATIONThe DOLBY H:BYPASS message indicates that Dolby Headphonesurround processing is in the default bypass mode, which delivers aconventional 2-channel signal to the headphones.Figure 54 – Headphone JackPress the Surround Modes Button on the front panel or the remote, toswitch to Dolby Headphone virtual surround processing, indicated by theDOLBY H:DH message. Dolby Headphone delivers an enhanced soundfield that emulates a 5.1-channel speaker system. No other surroundmodes are available for the headphones.Source SelectionPress the front-panel Source List Button to scroll through the sources.Each press of the button scrolls down the list that appears in the displayand on screen. See Figure 55.Figure 55 – Source List ButtonFor direct access to any source, press its Source Selector on the remote.The AVR 254 will switch to the audio and video inputs assigned to thesource.The source name will appear in the upper line of the front-panel display.If you retitled the source, the new title will appear. The audio and videoinputs assigned to the source will also appear briefly. The surroundmode will be displayed on the lower line.Any other settings you adjusted in the Setup Source menu will also beselected. You may view these settings in the Source Info menu at anytime by pressing the Info Settings Button.VIDEO TROUBLESHOOTING TIPS:If a video source is playing and there is no picture:• Check that you have selected the source to which thevideo input was assigned.• Check the wires for a loose or incorrect connection.• Check that you have selected the correct video input onthe display device (TV).• Try pressing the Resolution Button on the front panel repeat-edly until the correct video output resolution is selected anda picture appears. You will be prompted to accept or cancelthe resolution change, as the CANCEL message will appearon the front panel. Press the ¤ Button to view the ACCEPToption, and then press the OK Button to complete the changeto the output resolution.Additional tips for systems using HDMI:• Turn off all devices (including the TV, AVR and any sourcecomponents).• Unplug the HDMI cables starting with the cable between theTV and AVR, and continuing with the cables between the AVRand each source device.• Carefully reconnect the cables from the source devices tothe AVR, and connect the cable from the AVR to the TV last.• Turn on the devices in this order: TV, then AVR, then sourcedevices.Using the TunerTo select the AVR 254’s built-in tuner:1. Press the Source List Button on the front panel repeatedly until thedesired tuner band is selected, or use the ⁄/¤ Buttons to scrollthrough the source list.2. Press the Radio Source Selector on the remote. Press this buttonagain to switch bands (AM, FM or XM).A screen similar to the one shown in Figure 56 will appear, with theband indicated in the middle of the screen. (The XM band uses a slightlydifferent screen.)Figure 56 – FM RadioUse the ⁄/¤ Buttons to tune a station (or channel for XM Radio).The frequencies will be displayed in the front panel and graphically onscreen.The AVR defaults to automatic tuning, meaning each press of the⁄/¤ Buttons scans through all frequencies until a station with accept-able signal strength is found. To switch to manual tuning, in which eachpress of the ⁄/¤ Buttons steps through a single frequency increment(0.1MHz for FM, or 10kHz for AM), press the Menu Button. The RadioModes line will be highlighted, and each press of the OK Button togglesbetween automatic and manual tuning modes.When an FM station has been tuned, toggling the radio mode switchesbetween stereo and monaural play, which may improve reception ofweaker stations.A total of 30 stations (AM and FM together) may be stored as presets.When the desired station has been tuned, press the OK Button, and twodashes will flash in the front-panel display. Use the Alphanumeric Keysto enter the desired preset number.