Altec Lansing FX4021 User Manual page 6

Symptom Possible Problem
No sound Power isn't turned on.
from one or
more speakers.
Volume is set too low.
The color-coded 3.5mm stereo cables are not properly
connected to the audio source.
Problem with audio source device.
Crackling sound Bad connection.
from speakers.
Volume level in computer operating system is set too
high.
A problem with your audio source device.
Sound is Volume level set too high.
distorted.
Computer operating system volume level is set too
high.
Sound source is distorted.
Radio Too close to a radio tower.
interference.
No sound Bad connection.
from subwoofer.
Sound source has little low-frequency content.
Low hum The AC in your house is at 60 cycles per second, which is
from subwoofer. within the audio frequency of the subwoofer.
Loud hum Bad connection.
from subwoofer.
Bass level set too high.
Volume or bass level on your audio source device is set
too high.
Distorted monitor. Subwoofer too close to monitor.
Solution
After all other connections are made, plug the AC power cord (on the back of
subwoofer) into a wall outlet.
Turn on the speaker system by pressing the stand-by button
pod or wireless remote. An LED will light on the control pod when the power
is ON.
The rotary dial on the control pod controls the master volume. Rotate the dial
to the right to increase the volume.
Check volume level on the computer sound card or alternate audio source
device, and set at mid-level.
Check the plug connections on the audio source. Make sure the signal cables
are inserted firmly into the correct jacks.
Test the speakers on another audio device. Remove the 3.5mm stereo cable
from the audio source device and connect it to "line-out," "audio-out," or the
headphone jack of another audio source.
Check all cables. Make sure they are connected to "line-out" or "audio-out"
jack on your sound card or other audio source — NOT "speaker-out."
Check the computer operating system volume level and decrease it if necessary.
Unplug the stereo cable from the audio source. Then plug it into the headphone
jack of an alternate audio source (e.g., Walkman, Discman or FM radio).
The rotary dial on the control pod controls the master volume. Rotate the dial
to the left to decrease the volume.
Adjust the computer operating system volume and balance levels to the
center as a starting point, then adjust the level on the speaker using the
volume control.
WAV files are often of poor quality. So distortion and noise are easily noticed
with high-powered speakers. Try a different sound source such as a music CD.
Move your speakers until the interference goes away.
Check to make sure that all cables are connected properly and are making a
clear connection.
Many .WAV and .MID files often have little low-frequency content and sound
flat when you listen to them on a computer. Try a song with more bass–
something from your CD collection.
Some low hum may be detected when your speaker system is powered on
without an audio source playing, or when the volume is set at an extremely
low level.
Unplug the AC power cord from the surge protector (if used), and plug directly
into an AC wall outlet.
Move your cables. Check to ensure they are making a clear connection.
To control the bass, press the "Bass" button on the control pod and rotate the
dial to the left to decrease it.
Disconnect your 3.5mm stereo cable from the audio source. If the loud hum
goes away, lower the volume on the audio source.
Lower the volume or bass level on your computer, portable device, etc.
Because the subwoofer is not magnetically shielded, it can cause distortion if
it's too close to your monitor. Move the subwoofer so it's at least 2 feet from
your monitor.
4
on the control