10
Troubleshooting
Refer to the chart below if the unit does not function properly. If the problem you are experiencing is not
listed, or if the instructions fail to help you resolve the problem, disconnect the power cord and contact your
authorized Yamaha dealer or service center.
For the Subwoofer (SW-P240) only
Problem
Cause
What to Do
No sound.
Speaker cables are not connected
securely.
Connect the speaker cables securely.
Sound level is too low.
Speaker cables are not connected
correctly.
Connect the speaker cables correctly:
L (left) to L, R (right) to R, “+” to “+”
and “–” to “–”.
Problem
Cause
What to Do
Power is not supplied even though the
POWER switch is set to the ON position.
The power plug is not securely
connected.
Turn the power switch OFF, then
connect the power plug securely.
No sound.
The VOLUME control is set to 0.
Turn the VOLUME control to the
right (clockwise).
Speaker cables are not connected
securely.
Connect the speaker cables securely.
Sound level is too low.
Speaker cables are not connected
correctly.
Connect the speaker cables correctly:
L (left) to L, R (right) to R, “+” to “+”
and “–” to “–”.
You are playing a sound source that
includes inadequate bass frequencies.
Play a sound source that includes
more bass frequencies.
The sound level has been diminished
by standing waves.
Reposition the subwoofer, or break
up the parallel wall surface by
placing bookshelves or other large
objects along the wall.
NSP240,246̲U.book Page 10 Wednesday, October 22, 2003 3:29 PM
