Harman Kardon AVP-1A Owners Manual - Page 31

Troubleshooting Symptom No output from one or more channels No center channel output Poor or smeared imaging Indistinct dialog Clipping distortion Too little or Too much bass Uneven surround coverage Probable Cause • Defective cables • Defective amplifier • Amplifier not turned on • CTR button not engaged • Poor room acoustics • Poor program source • Improper polarity • Slap echoes • Miscalibration of center channel output level • Input level miscalibration • Inadequate power amps • Subwoofer level too high • Excessive room absorption • Poorly recorded program source • Excessively high playback levels • Misadjusted subwoofer level • Severe room modes or bass loss due to room construction • Poor speaker placement, strong reflections • Excessive absorption near surrounds Solution • Check/replace cables or fuses • Verify that the signal source is operating and providing proper signal output to the power amplifiers • Verify proper operation of remote control • Check amplifier • Check AVP1A • Use absorptive material to minimize early reflections • Check another program source; program is synthesize stereo from mono source (broadcast stereo TV) • Aim speakers at listening area; check polarity • Add absorption or diffusion materials check levels using WOW! disc or internal test noise sequencer • Recalibrate input level controls • Use larger amplifiers • Adjust subwoofer level of crossover • Remove absorption selectively • Try alternative program source • Restore normal playback levels • Adjust level by using built-in test signals • Move subwoofers to improve performance • Place surrounds according to THX spec • Add absorption and/or diffusion materials • Remove absorptive material to provide surround 28