Troubleshooting Chart - Harman Kardon AVR 70 Owner's Manual

AVR70 engelsk manual 11/01/98 11:57

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
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
Side 27
Troubleshooting
27
CAUSE
• No AC Power
• Intermittent input connections
• is on
MUTE
• Volume control is down
• Incorrect surround mode
• Input is monaural
• Incorrect configuration
• TV input is "S" Video
• Weak batteries in remote
• Remote is in position
LEARN
• Remote sensor is obscured
• Local interference
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 and
MEMO Ó CLEAR Ô
buttons at the same time for a few
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 button.
MUTE
• 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 the
.
SET UP MENU
• Change TV input to Composite Video.
The menus are available ONLY on Composite
Video.
• Change remote batteries.
• Slide switch to
USE/LEARN 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.
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.
.