AVR 151S (serv.man2) - Harman Kardon Audio Service Manual (repair manual). Page 10

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ENGLISH

AVR

Troubleshooting

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

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

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

Harman Kardon

AVR151, AVR151S 

Service Manual

Service Manual

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