Troubleshooting Guide; Processor Reset - Harman Kardon AVR 335 Owner's Manual

SYMPTOM
Unit does not function when Main
Power Switch is pushed
Display lights, but no sound
or picture
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
Unit does not respond to
remote commands
Intermittent buzzing in tuner
Letters flash in the channel indicator
display and digital audio stops
Fan does not appear to operate
In addition to the items shown above, additional information on troubleshooting possible problems with your AVR 335, or installation-related issues, may be found in the list of
"Frequently Asked Questions" which is located in the Product Support section of our Web site at www.harmankardon.com.

Processor Reset

In the rare case where the unit's operation or the dis-
plays 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 sys-
tem reset may clear the problem.
CAUSE
• No AC power
• Intermittent input connections
• Mute is on
• Volume control is down
• 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
• Weak batteries in remote
• Wrong device selected
• Remote sensor is obscured
• Local interference
• Digital audio feed paused
• Additional cooling may not be required
To clear the AVR 335's entire system memory includ-
ing tuner presets, output level settings, delay times and
speaker configuration data, press and hold the Tone
Mode Button 5 buttons for three seconds. The unit
will turn on automatically.
NOTE: Resetting the processor will erase any configu-
ration settings you have made for speakers, output
levels, surround modes and digital input assignments,
as well as the tuner presets. The unit will be returned
to the factory presets, and all settings for these items
must be reentered.

TROUBLESHOOTING GUIDE

SOLUTION
• Make certain AC power cord is plugged into
a live outlet
• Check to see whether outlet is switch-controlled
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• Make certain that all input and speaker connections
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are secure
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• Press Mute Button
• Turn up volume control
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• Follow the instructions in the Display Brightness section
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on page 33 so that the display is set to VFD FULL
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• Check speaker wire connections for shorts at receiver and
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speaker ends
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• Contact your local Harman Kardon service center
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• 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
• The fan is activated only when additional cooling is required due to
high internal temperature. It is normal for the fan to be inactive at
normal volume levels.
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 center.
TROUBLESHOOTING GUIDE
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