Harman-Kardon AVR80 Troubleshooting Chart, Symptom, Cause, Solution, Memory Backup

AVR80 manual 11/01/98 13:01 Side 35

Troubleshooting

35

Troubleshooting Chart

SYMPTOM	CAUSE	SOLUTION
No front panel lights when power switch	• No AC Power	• Make certain AC power cord is plugged
is pressed		into a live outlet.
		• Check to see if outlet is switch controlled.
Display lights, but no sound or picture	• Intermittent input connections	• Make certain that all input and speaker
		connections are secure.
	• MUTE is on	• Press MUTE button.
	• Volume control is down	• Turn up volume control.
No sound from surround or center speakers	• Incorrect surround mode	• Select a mode other than Dolby 3 Stereo,
		Stereo or Monaural.
	• Input is monaural	• There is no surround information from
		mono sources.
	• Incorrect configuration	• Check configuration in SET UP MENU1.
No On Screen Control Menus	• TV input is “S” Video	• Change TV input to Composite Video.
		The menus are available ONLY on Composite
		Video.
Unit does not respond to remote commands	• Weak batteries in remote	• Change remote batteries.
	• Remote is in LEARN position	• Slide USE/LEARN switch to USE.
	• Remote sensor is obscured	• Make certain front panel sensor is visible
		to remote.
Intermittent buzzing in tuner	• Local interference	• Move unit or antenna away from computers,
		fluorescent lights, TVs, motors or other
		electrical appliances.

ENGLISH

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 òand CLEAR ó

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.