Yamaha AX-9 owner manual Troubleshooting, Symptom Cause Remedy

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 cord is not plugged in or is not	Firmly plug in the power cord.
STANDBY/ON switch is pressed, or turns	completely inserted.
into the standby mode suddenly soon after
	The IMPEDANCE SELECTOR switch on the	Set the switch to either end closely.
the power is turned on.
	rear panel is not set to either 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
normally.	(lightning, excessive static electricity, etc.) or a	disconnect the AC power cord from the AC
	misoperation on this unit while using this unit.	outlet. After about 30 seconds have passed,
		connect the power and operate this unit again.
No sound.	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	Turning the unit into the standby mode and
	because of short circuit etc.	then on 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.
There is a lack of bass, and no ambience.	The + and – wires are connected in reverse at	Connect the speaker wires in the correct phase
	the amplifier or speakers.	(+ and –).
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
	terminal.	turntable and this unit.
The volume level is low while playing a	The record is being played on a turntable with	The player should be connected to the unit
record.	an MC cartridge.	through 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.
The sound is degraded when listening with	This unit is in the standby mode.	Turn the power to this unit on.
the headphones connected to the compact
disc player or cassette deck that are
connected with this unit.
Using the BASS, TREBLE and BALANCE	The PURE DIRECT switch is ON.	The PURE DIRECT switch must be switched
controls does not affect the tone.		OFF to use those controls.
The remote control transmitter does not	Direct sunlight or lighting (of an inverter type of	Change position of the main unit.
work.	fluorescent lamp etc.) is striking the remote
	control sensor of the main unit.
The distance or range within which the	The batteries of this remote control transmitter	Replace the batteries with new ones.
remote control transmitter can be used is	are too weak.
short.

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