Yamaha RX-777 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 PROBLEM column, disconnect the power cord and contact your authorized YAMAHA dealer or service center for help.

PROBLEM	CAUSE	REMEDY
Amplifier
The unit fails to turn on when the STANDBY/	Power cord is not plugged in or is not completely	Firmly plug in the power cord.
ON switch is pressed.	inserted.
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 pass, 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.
	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 of	Check the IMPEDANCE SELECTOR switch is set
	short circuit etc.	to the appropriate position and then turn the unit
		back on.
		Check the speaker wires are not touching each
		other and then turn the unit back on.
	The SLEEP timer has functioned.	Turn on the power, and play the source again.
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 sound	The component connected to the REC or ZONE 2	Turn the power to the component on.
is distorted.	output terminals of this unit is turned off.
Sound level is low.	The LOUDNESS control is functioning.	Set the LOUDNESS control to the 0 position.
The INPUT selector will not function though it	The CD DIRECT AMP switch is ON.	Switch off the CD DIRECT AMP switch.
is turned.
Using the BASS, TREBLE, BALANCE and	The CD DIRECT AMP or PURE DIRECT switch	The CD DIRECT AMP and PURE DIRECT
LOUDNESS controls does not affect the tone.	is ON.	switches must be switched OFF to use those
		controls.
FM
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
	poor.
		tuning mode.
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	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.
AM
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.
There are continuous crackling and hissing	Noises 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
		the noises.
There are buzzing and whining noises (especially	A television set is being used nearby.	Relocate this unit away from the TV.
in the evening).

E-16