Yamaha RX-V990 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 POWER	Power cord is not plugged in or is not completely	FFirmly plug in the power cord.
	switch is pressed.	inserted.
	No sound or no picture.	Incorrect output cord connections.	Connect the cords properly. If the problem persists,
			the cords may be defective.
		Appropriate input selector is not pressed.	Press the appropriate input selector corresponding
			to the input source.
	The sound suddenly goes off.	The protection circuit has been activated because	Turning the unit off and then on will reset the
		of short circuit etc.	protection circuit.
		The SLEEP timer functioned.	Do not make 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.
Amplifier	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 power to the component connected to the	Turn the power to the component on.
	sound is distorted.	REC OUT terminals of this unit is off.
	No sound from the rear speakers.	The sound output level to the rear speakers is set	Turn up the sound output level with the REAR
		to 0.	LEVEL control.
		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	Turn up the sound output level with the CENTER
		to 0.	LEVEL control.
		The center channel mode is in PHANTOM mode.	Select NORMAL or WIDE.
		Incorrect sound field program selection.	Select the appropriate program.
		No sound field program is selected.
	FM stereo reception is noisy.	Because of the characteristics of FM stereo	Check the antenna connections. Try using a
		broadcasts, this is limited to cases where the	multiple element FM antenna.
		transmitter is too far away or the antenna input is
FM		poor.
	There is distortion and clear reception cannot be	There is multipath interference.	Adjust antenna placement to eliminate multipath
	obtained even with a good FM antenna.		interference.
	A desired station cannot be tuned in with	The station is too weak.	Use Manual tuning mode. Use a high quality
	Auto tuning.		directional FM antenna.
	A desired station cannot be tuned in with	Weak signal or loose antenna connections.	Tighten the AM loop antenna connections and
	Auto tuning.		rotate it for best reception. Use Manual tuning
			mode.
AM	There are continuous crackling and hissing	Noises will result from lighting, fluorescent lamps,	Use an outdoor antenna and a ground wire. This
	noises.	motors, thermostats and other electrical	will help somewhat but it is difficult to eliminate all
		equipment.	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).
transmitter	The remote control transmitter does not work.	Direct sunlight or lighting (of an inverter type of	Change the position of the main unit.
		fluorescent lamp etc.) is striking the remote control
control		sensor of the main unit.
		The batteries of this remote control transmitter are	Replace the batteries with new ones.
Remote
		too weak.
others	The sound is degraded when monitoring is	The power to this unit is off.	Turn the power to this unit on.
	performed by using the headphones connected to
	the compact disc player or cassette deck which
	are connected with this unit.

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