Yamaha RX-V393, RX-V493 TROUBLESHOOTING

TROUBLESHOOTING

If the unit fails to operate normally, check the following points to determine whether the fault can be corrected by the simple measures suggested. If it cannot be corrected, or if the fault is not listed in the SYMPTOM column, disconnect the power cord and contact your authorized YAMAHA dealer or service center for help.

	SYMPTOM	CAUSE	REMEDY
	The unit fails to turn on when the STANDBY/ON	Power cord is not plugged in or is not completely	Firmly plug in the power cord.
	switch is pressed, or turns into the standby	inserted.
	mode suddenly soon after the power is turned
		The IMPEDANCE SELECTOR switch on the rear	Set the switch to the upper or the lower end closely.
	on.
		panel is not set to the upper or the lower end
		closely.
	It happens that this unit does not work	There is an influence of strong external noise	Turn this unit into the standby mode and disconnect
	normally.	(lightning, excessive static electricity, etc.) or a	the AC power cord from the AC outlet. After about
		misoperation on this unit while using this unit.	30 seconds have passed, connect the power and
			operate this unit again.
	No sound or no picture.	Incorrect output cord connections.	Connect the cords properly. If the problem persists,
			the cords may be defective.
		Appropriate input source is not selected.	Select an appropriate input source with the input
			selector buttons.
		The SPEAKERS switches are not set properly.	Set the SPEAKERS switch which corresponds to
			the speakers to be used to the ON position.
		Speaker connections are not secure.	Secure the connections.
	The sound suddenly goes off.	The protection circuit has been activated because	Turning the unit into the standby mode and then on
Amplifier		of short circuit etc.	will reset the protection circuit.
		The SLEEP timer has functioned.	Cancel the SLEEP timer function.
	Only one side speaker outputs the sound.	Incorrect setting of the BALANCE control.	Adjust it to the appropriate position.
		Incorrect cord connections.	Connect the cords properly. If the problem persists,
			the cords may be defective.
	Sound “hums”.	Incorrect cord connections.	Firmly connect the audio plugs. If the problem
			persists, the cords may be defective.
		No connection from the turntable to the GND	Make the GND connection between the turntable
		terminal.	and this unit.
	The volume level is low while playing a record.	The record is being played on a turntable with an	The player should be connected to the unit through
		MC cartridge.	the MC head amplifier.
	The volume level cannot be increased, or	The component connected to the REC OUT	Turn the power to the component on.
	sound is distorted.	terminals of this unit is in the standby mode.
	No sound from the rear speakers.	The sound output level to the rear speakers is set	Raise the sound output level to the rear speakers.
		to minimum.
		The monaural sound source is played in DOLBY	Select another program suitable for the monaural
		PRO LOGIC or DOLBY PRO LOGIC ENHANCED	sound source.
		mode.
	No sound from the center speaker.	The sound output level to the center speaker is set	Raise the sound output level to the center speaker.
		to minimum.
		The center channel mode is in PHANTOM mode.	Select NORMAL or WIDE.
		Incorrect sound field program selection.	Select the appropriate program.
	FM stereo reception is noisy.	Because of the characteristics of FM stereo	Check the antenna connections.
		broadcasts, this is limited to cases where the	Try using a high quality directional FM antenna.
		transmitter is too far away or the antenna input is	Set the TUNING MODE button to the manual tuning
		poor.	mode.
FM	There is distortion and clear reception cannot	There is multipath interference.	Adjust antenna placement to eliminate multipath
	be obtained even with a good FM antenna.		interference.
	A desired station cannot be tuned in with the	The station is too weak.	Use the manual tuning method.
	automatic tuning method.		Use a high quality directional FM antenna.
	Previously preset stations can no longer be	This unit has been unplugged for a long period.	Repeat the presetting procedure.
	tuned in.
	A desired station cannot be tuned in with the	Weak signal or loose antenna connections.	Tighten the AM loop antenna connections and
	automatic tuning method.		rotate it for best reception.
			Use the manual tuning method.
AM	There are continuous crackling and hissing	Noises will result from ligtning, fluorescent lamps,	Use an outdoor antenna and a ground wire. This
	noises.	motors, thermostats and other electrical equipment.	will help somewhat but it is difficult to eliminate all
			noise.
	There are buzzing and whining noises	A television set is being used nearby.	Relocate this unit away from the TV.
	(especially in the evening).
Remotecontrol transmitter	The remote control transmitter does not work.	Direct sunlight or lighting (of an inverter type of	Change the position of the main unit.
		The batteries of this remote control transmitter are	Replace the batteries with new ones.
		fluorescent lamp etc.) is striking the remote control
		sensor of the main unit.
		too weak.
Others	The sound is degraded when listening with the	This unit is in the standby mode.	Turn the power to this unit on.
	headphones connected to the compact disc
	player or cassette deck that are connected with
	this unit.

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