Harman Kardon AVR 520 Owners Manual - Page 54

Troubleshooting Guide SYMPTOM Unit does not function when Main Power Switch is pushed CAUSE • No AC Power Display lights, but no sound or picture • Intermittent input connections • Mute is on • Volume control is down Unit turns on, but front panel display does not light up No sound from any speaker; light around power switch is red No sound from surround or center speakers • Display brightness is turned off • Amplifier is in protection mode due to possible short • Amplifier is in protection mode due to internal problems • Incorrect surround mode • Input is monaural • Incorrect configuration • Stereo or Mono program material Unit does not respond to remote commands • Weak batteries in remote • Wrong device selected • Remote sensor is obscured Intermittent buzzing in tuner • Local interference Letters flash in the channel indicator display and digital audio stops • Digital audio feed paused SOLUTION • Make certain AC power cord is plugged into a live outlet • Check to see whether outlet is switch-controlled • Make certain that all input and speaker connections are secure • Press Mute button • Turn up volume control • Follow the instructions in the Display Brightness section on page 35 so that the display is set to VFD FULL • Check speaker wire connections for shorts at receiver and speaker ends • Contact your local Harman Kardon service depot • Select a mode other than Stereo • There is no surround information from mono sources • Check speaker mode configuration • The surround decoder may not create center- or rear-channel information from nonencoded programs • Change remote batteries • Press the AVR selector • Make certain front panel sensor is visible to remote or connect remote sensor • Move unit or antenna away from computers, fluorescent lights, motors or other electrical appliances • Resume play for DVD • Check that Digital Input is selected Processor Reset In the rare case where the unit's operation or the displays seem abnormal, the cause may involve the erratic operation of the system's memory or microprocessor. To correct this problem, first unplug the unit from the AC wall outlet and wait at least three minutes. After the pause, reconnect the AC power cord and check the unit's operation. If the system still malfunctions, a system reset may clear the problem. To clear the AVR 520's entire system memory including tuner presets, output level settings, delay times and speaker configuration data, first put the unit in Standby by pressing the System Power Control button 2. Next, press and hold the Tone Mode 8 and the FM Mode Selector ^ buttons for three seconds. The unit will turn on automatically and display the RESET message in the Main Information Display Y. Note that once you have cleared the memory in this manner, it is necessary to reestablish all system configuration settings and tuner presets. NOTE: Resetting the processor will erase any configuration settings you have made for speakers, output levels, surround modes, digital input assignments as well as the tuner presets. After a reset the unit will be returned to the factory presets, and all settings for these items must be reentered. If the system is still operating incorrectly, there may have been an electronic discharge or severe AC line interference that has corrupted the memory or microprocessor. If these steps do not solve the problem, consult an authorized Harman Kardon service depot. 54 TROUBLESHOOTING GUIDE