Yamaha GX-700 Appendix, Troubleshooting, Cause, Tuner, Problem, General, What to Do

Appendix

Troubleshooting

Refer to the chart below when this system does not function properly. If the problem you are experiencing is not listed below or if the instruction below does not help, disconnect the power cord and contact your authorized YAMAHA dealer or service center.

	Problem	Cause	What to Do
	This system does not work normally.	There is an influence of strong external	Set this system to the standby mode and
		noise (lightning, excessive static	disconnect the AC power cord from the AC outlet.
		electricity, etc.) or the system was	After about 30 seconds pass, connect the power
		operated incorrectly.	and operate this system again.
	The sound suddenly goes off.	The protection circuit was activated	Set this system to the standby mode, then turn
		because of a short circuit, etc.	on to reset the protection circuit.
		The SLEEP timer was activated.	Cancel the SLEEP timer function.
	No sound from speakers.	Speaker connections are not secure.	Secure the connections.
	No sound from the rear speakers.	The sound output level to the rear	Raise the sound output level to the rear
		speakers is set to minimum.	speakers.
		Incorrect sound field program selection.	Select the appropriate program.
		No sound field program is selected.
General	No sound from the center speaker.	The sound output level to the center	Raise the sound output level to the center
		speaker is set to minimum.	speaker.
		Incorrect sound field program selection.	Select the appropriate program.
		No sound field program is selected.
	No sound (or no picture) from the external	Incorrect cord connections.	Connect the cords properly. If the problem
	unit connected with this system.		persists, the cords may be defective.
		Input source selection is not correct.	Make a correct input source selection.
	Timer cannot be set.	Current time is not set.	Set current time.
	This system will not operate properly.	The internal microcomputer has been	Unplug the AC supply lead from the wall AC
		frozen by an external electric shock	outlet, then plug in again after about one minute.
		(lightning, excessive static electricity, etc.)
		or power supply with low voltage.
	The volume level cannot be increased, or	The component connected to the AUX/MD	Turn on the power to the component.
	sound is distorted.	OUT or VCR OUT terminals on the rear of
		the main unit is turned off.
	A picture of the TV is disturbed.	There is an influence of magnet in the	Place the center speaker apart from the TV.
		center speaker.
	Excessive static in FM broadcasts.	Interference from starting motor of nearby	Position the FM antenna as high and as far away
		car.	from nearby roads as possible. Use coaxial cable.
		Interference from thermostat of nearby
		electrical appliance.
	Noise increases during stereo broadcasts.	Antenna input is too weak due to	Check antenna connections.
		obstructions or excessive distance from
			Install a multi-element type FM antenna if possible.
		broadcasting station.
	Stereo broadcasts are noisy and STEREO	Insufficient antenna input.	Install an antenna appropriate for the electric field
Tuner	indicator blinks on and off.		strength of your area.
	Preset stations cannot be selected.	Preset memory has been erased.	Reprogram memory presettings.
	Buzzing or static during AM broadcasts.	Interference from source such as	Problem is difficult to eliminate but can be
		lightning, fluorescent lights, electric	lessened by grounding AM loop antenna.
		motors or thermostat of nearby electrical
		appliance.
		TV or microprocessor is being used	Move away from TV or microprocessor.
		nearby.
	AM broadcast sensitivity is poor.	Radio signal is weak or antenna is not	Properly connect AM loop antenna.
		properly connected.
			Change orientation of AM loop antenna.
			Install an external AM antenna.

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