Harman Kardon AVR80 Owners Manual - Page 41

AVR80 manual 11/01/98 13:01 Side 35 ENGLISH Troubleshooting 35 Troubleshooting Chart SYMPTOM No front panel lights when power switch is pressed Display lights, but no sound or picture No sound from surround or center speakers No On Screen Control Menus Unit does not respond to remote commands Intermittent buzzing in tuner CAUSE • No AC Power • Intermittent input connections • MUTE is on • Volume control is down • Incorrect surround mode • Input is monaural • Incorrect configuration • TV input is "S" Video • Weak batteries in remote • Remote is in LEARN position • Remote sensor is obscured • Local interference SOLUTION • Make certain AC power cord is plugged into a live outlet. • Check to see if outlet is switch controlled. • Make certain that all input and speaker connections are secure. • Press MUTE button. • Turn up volume control. • Select a mode other than Dolby 3 Stereo, Stereo or Monaural. • There is no surround information from mono sources. • Check configuration in SET UP MENU1. • Change TV input to Composite Video. The menus are available ONLY on Composite Video. • Change remote batteries. • Slide USE/LEARN switch to USE. • Make certain front panel sensor is visible to remote. • Move unit or antenna away from computers, fluorescent lights, TVs, motors or other electrical appliances. Memory Backup This product is equipped with a memory backup system that preserves tuner presets and system configuration information if the unit is accidentally unplugged or subject to a power outage. This memory will last for approximately one week, after which time all information must be re-entered. System 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 system's memory, press and hold the MEMO Ú and CLEAR Û buttons at the same time for a few seconds. After clearing the memory it will be necessary to re-establish all system configuration information and tuner presets. If the system is still operating incorrectly, there may have been an electrostatic discharge or severe AC line interference that has corrupted the memory or microprocessor. If a reset does not solve the problem, consult an authorized Harman Kardon service depot.