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53 TROUBLESHOOTING GUIDE
Troubleshooting Guide
SYMPTOM CAUSE SOLUTION
Unit does not function when Main No AC Power Make certain AC power cord is plugged into
Power Switch is pushed a live outlet
Check to see whether outlet is switch-controlled
Display lights, but no sound Intermittent input connections Make certain that all input and speaker connections
or picture
Mute is on are secure
Volume control is down Press
Mute button
Turn up volume control
Unit turns on, but front panel Display brightness is turned off Follow the instructions in the Display Brightness section
display does not light up on page 33 so that the display is set to VFD FULL
No sound from any speaker; Amplifier is in protection mode Check speaker wire connections for shorts at receiver and
light around power switch is red due to possible short speaker ends
Amplifier is in protection mode Contact your local Harman Kardon service depot
due to internal problems
No sound from surround or Incorrect surround mode Select a mode other than Stereo
center 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-channel
information from nonencoded programs
Unit does not respond to Weak batteries in remote Change remote batteries
remote commands Wrong device selected Press the AVR selector
Remote sensor is obscured Make certain front panel sensor is visible to remote
or connect remote sensor
Intermittent buzzing in tuner Local interference Move unit or antenna away from computers, fluorescent
lights, motors or other electrical appliances
Letters flash in the channel indicator Digital audio feed paused Resume play for DVD
display and digital audio stops Check that Digital Input is selected
Processor Reset
In the rare case where the units operation or
the displays seem abnormal, the cause may
involve the erratic operation of the systems
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 units operation. If
the system still malfunctions, a system reset
may clear the problem.
To clear the AVR 510s 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 6 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.
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