AVR 170 (serv.man6) - Harman Kardon Audio Service Manual (repair manual). Page 30

AVR

28

Troubleshooting

unit does not function when main power switch is 

turned on

• 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 message 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; protect message 

appears on message display

•  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 stereo 

programs

unit does not respond to remote control commands

• Weak batteries in remote
• AVR not selected
• Remote sensor is obscured

• Change batteries in remote
• Press the Setup/AVR button
•  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

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

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

Harman Kardon

AVR 170 / 230V Service Manual

Page 30 of 114