Troubleshooting - Yamaha YST-SW225 Mode D'emploi

Refer to the chart below when this unit does not function properly. If the problem you are experiencing is not listed below
or if the instructions given below do not help, disconnect the power cord and contact your authorized YAMAHA dealer
or service center.
Problem
Power is not supplied even though the
STANDBY/ON button is set to the ON
position.
No sound.
Sound level is too low.
The subwoofer does not turn on
automatically.
The subwoofer does not turn into the
standby mode automatically.
The subwoofer turns into the standby
mode unexpectedly.
The subwoofer turns on unexpectedly.

TROUBLESHOOTING

Cause
The power plug is not securely
connected.
The POWER switch is set to the OFF
position.
The volume is set to minimum.
Speaker cables are not connected
securely.
Speaker cables are not connected
correctly.
Setting of the PHASE switch is not
proper.
A source sound with few bass
frequencies is played.
It is influenced by standing waves.
The POWER switch is set to the OFF
position.
The STANDBY/ON button is set to the
STANDBY position.
The AUTO STANDBY switch is set to
the OFF position.
The level of input signal is too low.
There is an influence of noise generated
from external appliances etc.
The AUTO STANDBY switch is set to
the OFF position.
The level of input signal is too low.
There is an influence of noise generated
from external appliances etc.
What to Do
Connect it securely.
Set the POWER switch to the ON
position.
Raise the volume up.
Connect them securely.
Connect them correctly, that is L (left) to
L, R (right) to R, "+" to "+" and
"–" to "–".
Set the PHASE switch to the other
position.
Play a source sound with bass
frequencies.
Set the HIGH CUT control to a higher
position.
Reposition the subwoofer or break up
the parallel surface by placing
bookshelves etc. along the walls.
Set the POWER switch to the ON
position.
Set the STANDBY/ON button to the ON
position.
Set the AUTO STANDBY switch to the
"HIGH" or "LOW" position.
Set the AUTO STANDBY switch to the
"HIGH" position.
Move the subwoofer farther away from
such appliances and/or reposition the
connected speaker cables.
Otherwise, set the AUTO STANDBY
switch to the "OFF" position.
Set the AUTO STANDBY switch to the
"HIGH" or "LOW" position.
Set the AUTO STANDBY switch to the
"HIGH" position.
Move the subwoofer farther away from
such appliances and/or reposition the
connected speaker cables.
Otherwise, set the AUTO STANDBY
switch to the "OFF" position.
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