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TROUBLESHOOTING GUIDE 45
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 are secure
•
Mute is on • Press Mute Button
• Volume control is down • Turn up volume control
Unit tur
ns on, but front panel • Display brightness is turned off • Follow the instructions in the Display Brightness section
display does not light up
on page 28 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 center
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
In addition to the items shown above, additional information on troubleshooting possible problems with your AVR 135, or installation-related issues, may be found in the list of
"F
requently
Asked Questions" which is located in the Product Support section of our
W
eb site at www.harmankardon.com.
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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.
T
o 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.
To clear the AVR 135’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 button 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
,
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.
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.
AVR 135 OM 12/3/04 12:11 PM Page 45