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| TROUBLESHOOTING GUIDE |
SYMPTOM | CAUSE | SOLUTION |
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Unit does not function when Main | • No AC Power | • Make certain AC power cord is plugged into |
Power Switch is pushed |
| a live outlet |
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| • Check to see whether outlet is |
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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 41 |
| • Volume control is down | • Turn up volume control |
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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 28 so that the display is set to VFD FULL |
No sound from any speaker; light around power switch is red
• Amplifier is in protection mode | • Check speaker wire connections for shorts at receiver and |
due to possible short | speaker ends |
• Amplifier is in protection mode | • Contact your local Harman Kardon service center |
due to internal problems |
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No sound from surround or | • Incorrect surround mode | • Select a mode other than Stereo |
center speakers | • Input is monaural | • There is no surround information from mono sources |
| • Incorrect configuration | • Check speaker mode configuration |
| • Stereo or Mono program material | • The surround decoder may not create center- or |
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| information from nonencoded programs |
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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 |
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| or connect remote sensor |
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Intermittent buzzing in tuner | • Local interference | • Move unit or antenna away from computers, fluorescent |
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| lights, motors or other electrical appliances |
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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 |
In addition to the items shown above, additional information on troubleshooting possible problems with your AVR 135, or
Processor Reset
In the rare case where the unit’s operation or the dis- plays 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 sys- tem reset may clear the problem.
To clear the AVR 135’s entire system memory includ- ing tuner presets, output level settings, delay times and speaker configuration data, press and hold the Tone Mode Button 5 button for three seconds. The unit will turn on automatically.
NOTE: Resetting the processor will erase any configu- ration settings you have made for speakers, output levels, surround modes, digital input assignments as well as the tuner presets. The unit will be returned to the factory presets, and all settings for these items 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.
TROUBLESHOOTING GUIDE 45