Troubleshooting Guide; Processor Reset; Memory Backup - Harman Kardon AVR120 Service Manual

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AVR120

Troubleshooting Guide

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.
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

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
14 TROUBLESHOOTING GUIDE
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
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.
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SOLUTION
• Make certain AC power cord is plugged into
a live outlet
• Check to see whether outlet is switch-controlled
• Make certain that all input and speaker connections
are secure
• Press Mute button
• Turn up volume control
• Follow the instructions in the Display Brightness section
on page 26 so that the display is set to VFD FULL
• Check speaker wire connections for shorts at receiver and
speaker ends
• Contact your local Harman Kardon service center, which you can
locate by visiting our Web site at www.harmankardon.com
• Select a mode other than Stereo or Dolby 3 Stereo
• There is no surround information from mono sources
• Check speaker mode configuratioin
• 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
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.
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