80 DNX520VBTHelp? TroubleshootingSome functions of this unit may be disabled bysome settings made on this unit.! • Cannot set up the subwoofer.• Cannot set up subwoofer phase.• No output from the subwoofer.• Cannot set up the low pass filter.• Cannot set up the high pass filter.▲ Subwoofer is not set to On.☞ (page 71)▲ The Dual zone function is enabled.☞ (page 56)▲ The unit is set to STANDBY source.! • Cannot select the output destination of thesubsource in the Dual zone.• Cannot adjust the volume of the rearspeakers.▲ The Dual zone function is disabled.☞ (page 56)! Cannot play audio files.▲ "CD Read" of (page 74) is set to"2".! Cannot Folder select.▲ The Random play function is enabled.! Cannot perform Repeat play.▲ The PBC function is enabled.! • Cannot set up the equalizer.• Cannot set up the crossover network.▲ The Dual zone function is enabled.☞ (page 56)▲ The unit is set to STANDBY source.What might seem to be a malfunction in your unitmay just be the result of slight misoperation ormiswiring. Before calling service, first check thefollowing table for possible problems.General? The Touch Sensor Tone doesn’t sound.✔ The preout jack is being used.☞ The Touch Sensor Tone can’t be output fromthe preout jack.Tuner source? Radio reception is poor.✔ The car antenna is not extended.☞ Pull the antenna out all the way.✔ The antenna control wire is not connected.☞ Connect the wire correctly, referring to thesection on .Disc source? The specified disc does not play, but anotherone plays instead.✔ The specified CD is quite dirty.☞ Clean the CD.✔ The disc is severely scratched.☞ Try another disc instead.Audio file source? The sound skips when an Audio file is beingplayed.✔ The media is scratched or dirty.☞ Clean the media, referring to the CDcleaning of the section on (page 4).✔ The recording condition is bad.☞ Record the media again or use anothermedia.Hands-Free operation? SMS messages are not displayed correctly.☞ Turn off the unit and turn it back on.
