Kenwood KRF-V7050D, VR-507 In case of difficulty, Tuner, Amplifier, Resetting the Microcomputer

	In case of difficulty
	Resetting the Microcomputer					45
	The microcomputer may malfunction (unit cannot be operated,		For U.S.A. and Canada
	or shows an erroneous display) if the power cord is unplugged
			Unplug the power cord from the wall outlet, then plug it
	while the power is ON, or due to some other external factor. If this
	happens, execute the following procedure to reset the micro-		back in while holding down the POWER key.
	computer and return the unit to its normal operating condition.
			For other countries
	• Please note that resetting the microcomputer will clear the contents		With the power cord plugged in, turn the POWER key
			OFF. Then, while holding down the ON/STANDBY key,
	of the memory and returns the unit to the state it was in when it left the
			press POWER.
	factory.
	Amplifier
	Symptom	Cause		Remedy
	No sound from the speakers.	• The speaker cords are disconnected.		• Connect them properly referring to “Connecting
				the speakers”	^
		• VOLUME is set to the minimum position.		• Adjust the volume to a proper level.
		• MUTE is ON.		• Turn OFF the MUTE.	™
		• The SPEAKERS switches are set to OFF.		• Set the SPEAKERS switch(es) to ON.	)
	The standby indicator blinks and sound is	• Speaker cords are short-circuited.		• Turn the power off, eliminate the short-circuit-
	not output.			ing, then turn on the power again.
	Sound is not output from one of the speakers.	• The speaker cord is disconnected.		• Connect it properly referring to “Connecting the
				speakers”.	^
	Sound is not output from the surround	• The surround speaker cords and/or the center		• Connect it properly referring to “Connecting the
	speakers and / or the center speaker, or their	speaker cord is disconnected.		speakers”.	^
	sound is very small.	• A surround mode has not been engaged.		• Select a surround mode.
		• The surround and/or center volume controls are		• Adjust the speaker levels using the test tone.
		set to the minimum level.			(
	A humming noise is generated when the	• The audio cord from the turntable is not con-		• Insert the audio cord plugs securely into the
	PHONO input selector is selected.	nected to the PHONO jacks.		PHONO jacks.
		• The turntable is not grounded.		• Connect the grounding wire to the GND termi-
				nal on the rear panel.
	When playing a Dolby Digital source signal	• There are many possible causes for this prob-		• Set the input mode to digital manual before
	using a DVD player, the sound is cut off soon	lem, depending on the type of DVD player used.		starting playback of the Dolby Digital source.
	after it starts.				9
	No sound is produced during playback from	• The input mode is set to digital manual.		• Press the INPUT MODE key to select to digital
	a DVD player.			auto mode.	9
	A video source cannot be recorded	• The software is copy-guarded.		• Copy-guarded video software cannot be re-
	normally.			corded.
Tuner
	Symptom	Cause		Remedy
	Radio stations cannot be received.	• No antenna is connected.		• Connect an antenna.	$
		• The broadcast band is not set properly.		• Set the broadcast band properly.
		• The frequency of the desired station is not		• Tune the frequency of the desired station.
		tuned.			£
	Interference.	• Noise due to ignition noise from an automobile.		• Install the outdoor antenna away from the road.
		• Noise due to interference from an electric appli-		• Turn off the power to the appliance.
		ance.
		• Noise due to a nearby TV set.		• Install the receiver farther away from the TV.		Information
	A station which was preset cannot be re-	• The preset station belongs to a frequency that		• Preset a station with a receivable frequency.
	ceived by pressing the corresponding nu-	cannot be received.
	meric key.	• The preset memory was cleared because the		• Preset the station again.		Additional
		power cord had been unplugged for a long
		period of time.