Yamaha GX707VCD Appendix, Cause, Tuner, Problem, 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 supply lead and contact your authorized YAMAHA dealer or service center.

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

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