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42 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 are secure
•
Mute is on • Press Mute button
• Volume control is down • 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 26 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, which you can
due to internal problems locate by visiting our Web site at www.harmankardon.com
No sound from surround or • Incorrect surround mode • Select a mode other than Stereo or Dolby 3 Stereo
center speakers • Input is monaural • There is no surround information from mono sources
• Incorrect configuration • Check speaker mode configuratioin
• 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 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 AVR 120’s 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,
simultaneously 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
F. Note that once you
have cleared the memory in this manner, it is
necessary to reestablish all system configuration
settings and tuner presets.
NOTE: After a reset, the unit will be returned to
the factory presets, and all settings for tuner
memory and presets speaker configuration,
delay times and surround mode memories 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.
You can locate the service center nearest
to you by visiting our Web site at
www.harmankardon.com.
Memory Backup
This product is equipped with a memory backup
system that preserves the system configuration
information and tuner presets if the unit is acci-
dentally unplugged or subjected to a power
outage. This memory will last for approximately
two weeks, after which time all information
must be reentered.
Your AVR 120 receiver has been designed to provide many years of trouble-free service. In the event that you are experiencing difficulties, please check the
suggestions below for a possible solution to your problem. Additional information on the AVR 120, including updated information and user hints, is avail-
able from our Web site at www.harmankardon.com.