Yamaha 90 SPECIFICATIONS, 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 SYMPTOM column, disconnect the power cord and contact your authorized YAMAHA dealer or service center for help.

SYMPTOM	CAUSE	REMEDY
The power cannot be turned on.	The power cord is not plugged in, or the Main	Plug the power cord into an AC outlet and/or set the
	POWER switch is set to the OFF position.	Main POWER switch to the ON position.
No sound.	The VOLUME control is set to 0.	Turn the VOLUME control to right.
	Speaker wires are not connected securely.	Connect them securely.
Sound level is too low.	Speaker wires are connected incorrectly.	Connect them correctly; L (left) to L, R (right) to R, + to
		+ and – to –.
	Setting of the PHASE switch is not proper.	Set the switch to the other position.
	A source sound with few bass frequencies is	Play a source sound with bass frequencies.
	played.	Set the HIGH CUT control to a higher position.
	It is influenced by standing waves.	Reposition the subwoofer or break up the parallel
		surface by placing bookshelves etc. along the walls.
The unit does not turn on	The Main POWER switch is set to the OFF	Set the Main POWER switch to the ON position.
automatically.	position.
	The STANDBY/ON button is set to OFF.	Set the STANDBY/ON button to ON.
	The AUTO STANDBY switch is set to the OFF	Set the AUTO STANDBY switch to the HIGH or LOW
	position.	position.
	The level of input signal is too low.	Set the AUTO STANDBY switch to the HIGH
		position.
The unit turns off (on standby)	The level of input signal is too low.	Set the AUTO STANDBY switch to the HIGH
unexpectedly.		position.
The unit turns on unexpectedly.	An influence of noise generated from external	Move the unit farther away from such equipment and/
	equipment etc.	or change the position of connected speaker wires.
		Otherwise, set the AUTO STANDBY switch to the
		OFF position.

SPECIFICATIONS

English

YST-SW160

Type ................	Active Servo Processing Subwoofer System
Speaker Unit ....................	20 cm (8”) cone woofer (JA2160)
		magnetic shielding type x 2
Amplifier Output ...........................................		150 W/5 ohms
High-Cut Filter .........................		40 Hz–140 Hz (–24 dB/oct.)
Frequency Response .....................		20 Hz–160 Hz (–10 dB)
Power Supply
U.S.A. and Canada models ..................		AC 120 V, 60 Hz
Australia model .....................................		AC 240 V, 50 Hz
U.K. and Europe models ......................		AC 230 V, 50 Hz
General and China models
...................	AC 110/120/220/240 V, 50/60 Hz
	(Adjustable with Voltage Selector)

Power Consumption ....................................................	100 W
Dimensions (W × H × D) ...........	235 mm × 602 mm × 463 mm
	(9-5/16” × 23-3/4” × 18-1/4”)
Weight ......................................................	20 kg (44 lbs. 1 oz.)

* Design and specifications are subject to change without notice.

YST-SW90

Type ................	Active Servo Processing Subwoofer System
Speaker Unit ....................	20 cm (8”) cone woofer (JA2161)
		magnetic shielding type
Amplifier Output ...........................................		100 W/5 ohms
High-Cut Filter .........................		50 Hz–150 Hz (–24 dB/oct.)
Frequency Response .....................		23 Hz–170 Hz (–10 dB)
Power Supply
U.S.A. and Canada models ..................		AC 120 V, 60 Hz
Australia model .....................................		AC 240 V, 50 Hz
U.K. and Europe models ......................		AC 230 V, 50 Hz
General and China models
...................	AC 110/120/220/240 V, 50/60 Hz
	(Adjustable with Voltage Selector)

Power Consumption ......................................................	80 W
Dimensions (W × H × D) ...........	235 mm × 485 mm × 409 mm
	(9-5/16” × 19-1/8” × 16-1/8”)
Weight ....................................................	14 kg (30 lbs. 13 oz.)

* Design and specifications are subject to change without notice.

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