Yamaha AX-490, AX-590 TROUBLESHOOTING, work, CAUSE, REMEDY, SYMPTOM, No sound, decreases, Sound “hums”, affect the tone, (For AX-590only), switch is pressed, Sound level is low

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	Firmly plug in the power cord.
switch is pressed.	completely inserted.
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	Set the SPEAKERS switch which
	properly.	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 functioned because	Turning the unit off and then on will reset the
	of short circuit etc.	protection circuit.
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	Connect the speaker wires in the correct
	at the amplifier or speakers.	phase (+ 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.
Sound level is low.	The LOUDNESS control is functioning.	Set the LOUDNESS control to the FLAT
		position.
Sound level is low or sound is distorted	The PHONO (MM/MC) switch on the rear of	Reset the PHONO (MM/MC) switch to the
while playing a record on the turntable.	this unit is set to the improper position.	proper position.
(For AX-590 only)
The INPUT selector will not function	The CD DIRECT AMP switch is ON.	Switch off the CD DIRECT AMP switch.
though it is turned.
Using the BASS, TREBLE, BALANCE,	The CD DIRECT AMP or PURE DIRECT	The CD DIRECT AMP and PURE DIRECT
LOUDNESS controls and SUBSONIC	switch is ON.	switches must be switched OFF to use those
FILTER switch (AX-590 only) does not		controls.
affect the tone.
The remote control transmitter does not	Direct sunlight or lighting (of an inverter type	Change position of the main unit.
work.	of flourescent 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	Replace the batteries with new ones.
remote control transmitter can be used	transmitter are too weak.
decreases.

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