AVR 171 - Harman Kardon Audio Service Manual (repair manual). Page 10

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English
AVR
Troubleshooting
Symptom
Cause
Solution
unit does not function
• No AC power
• Ensure that the power cord is plugged into a live AC
power outlet
• Check if the AC outlet is switch-controlled
Front-panel display lights, but there’s no sound or picture
• Intermittent input connection
• Mute is on
• Volume control is turned down
• Secure all input and speaker connections
• Press Mute button
• Turn up Volume control
no sound from any speaker
• Amplifier is in protection mode due to possible short
circuit
• Amplifier is in protection mode due to internal
problems
• Check all speaker wires at speaker and AVR
connections for crossed wires
• Contact your local Harman Kardon service center
no sound from center or surround speakers
• Incorrect surround mode
• Program material is monophonic
• Incorrect speaker configuration
• Program material is stereo
• Select a surround mode other than stereo
• Mono programs contain no surround information
• Check the speaker configuration in the setup menu
• The surround decoder may not create center- or
surround-channel information from nonencoded 
programs 
unit does not respond to remote control commands
• Weak batteries in remote
• Remote sensor is obscured
• Change batteries in remote
• Ensure that the AVR’s front-panel remote sensor is in
the line of sight of the remote
Intermittent buzzing in tuner
• Local interference
• Move the AVR or antenna away from computers,
fluorescent lights, motors or other electrical appliances
(AVR 1710/AVR 171 only): Surround-back speaker 
settings cannot be accessed, and the test tone does not 
play through the surround back speakers
• Multi-zone operation has been selected/Assigned AMP
channels have been assigned to zone 2
• Use the Speaker Setup menu to reassign the Assigned
AMp to the surround back left and right channels
unable to activate remote control programming mode
• Source Selector button is not held for at least 3
seconds
• Be sure to hold the Source Selector button for at least
3 seconds
remote buttons light, but AVr does not respond
• Remote is in Zone 2 mode
• Press Zone 2 button (button will not illuminate when
remote is in zone 1 control mode).
unable to establish network connection
• AVR network programming requires rebooting
• Cycle the AVR into the Off mode, and then turn it on
again
Additional information on troubleshooting possible problems with your AVr and 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: www.harmankardon.com
Troubleshooting
Harman Kardon
AVR 171 Service Manual
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