Harman Kardon AVR 745 Owner's Manual

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Harman Kardon AVR 745 Owner's Manual Manual pdf 54 page image

54 TROUBLESHOOTING GUIDETROUBLESHOOTING GUIDESYMPTOM CAUSE SOLUTIONUnit does not function when Main • No AC Power • Make certain AC power cord is plugged intoPower Switch is pushed a live outlet• Check to see whether outlet is switch-controlledDisplay lights, but there is no sound • Intermittent input connections • Make certain that all input and speaker connectionsor picture are secure• Mute is on • Press Mute Button Bß• Volume control is down • Turn up volume controlUnit turns on, but front-panel • Display brightness is turned off • Follow the instructions in the Display Brightness sectiondisplay does not light up on pages 48–49 so that the display is set to VFD FULLNo sound from any speaker; • Amplifier is in protection mode • Check speaker wire connections for shorts at receiver andlight around power switch is red due to possible short speaker ends• 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 mode 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 selector• Remote sensor is obscured • Make certain front-panel sensor is visible to remoteor connect remote sensorIntermittent buzzing in tuner • Local interference • Move unit or antenna away from computers, fluorescentlights, motors or other electrical appliancesLetters flash in the channel indicator • Digital audio feed paused • Resume play for DVDdisplay and digital audio stops • Check that Digital Input is selectedFan does not appear to operate • Additional cooling may not be required • The fan is activated only when additional cooling is required due tohigh internal temperature, it is normal for the fan to be inactive atnormal volume levelsIn addition to the items shown above, additional information on troubleshooting possible problems with your AVR 745, or installation-related issues, may be found in the list of“Frequently Asked Questions” which is located in the Product Support section of our Web site at www.harmankardon.com.Processor ResetIn the rare case where the unit’s operation or the dis-plays seem abnormal, the cause may involve the erraticoperation of the system’s memory or microprocessor.To correct this problem, first unplug the unit from theAC wall outlet and wait at least 3 minutes. After thepause, reconnect the AC power cord and check theunit’s operation. If the system still malfunctions, asystem reset may clear the problem.To clear the AVR 745’s entire system memory includ-ing tuner presets, output level settings, delay times andspeaker configuration data, first put the unit in Standbyby pressing the Standby/On Switch 1. Next, pressand hold the Surround Mode Group Selector 2and the Tuning Mode Selector 8 buttons for 3seconds.The unit will turn on automatically and display theRESET message in the Upper Display Line #.NOTE: Resetting the processor will erase any configu-ration settings you have made for speakers, outputlevels, surround modes, and digital input assignments,as well as the tuner presets. After a reset, the unit willbe returned to the factory presets, and all settings forthese items must be reentered.If the system is still operating incorrectly, there mayhave been an electronic discharge or severe AC lineinterference that has corrupted the memory ormicroprocessor.If these steps do not solve the problem, consult anauthorized Harman Kardon service center.54 TROUBLESHOOTING GUIDE