Troubleshooting
7
If you think your subwoofer has a problem, please do everything you can to confirm the problem before contacting your dealer or calling for service, including reading through the troubleshooting section. Many times the problem actually is caused by other items in the system or the subwoofer’s interaction with those items. Much of the time, the service department will not be able to reproduce the error.
Problem | Cause |
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| You have an amplifier problem. | • | Disconnect all interconnects from the amplifier. If still | |
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| hums, contact your dealer or call/email technical support. | ||
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| • | It is possible that some cables have a poor or broken | |
| Your speaker wires or interconnects are |
| ground due to poor construction, oxidation, or damage. | |
Humming or |
| Also, poorly shielded cables can potentially pick up | ||
the cause. |
| noise. Try another interconnect or speaker wire. Also, | ||
buzzing noise |
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| move the signal cable away from AC cables, power | ||
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| transformers, or other EMI sources. | |
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| A light dimmer or other triac based (SRC) | • Use an AC line filter or plug the unit into a different circuit. | ||
| device is on the same AC circuit. | |||
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| • | If hum goes away when interconnects are disconnected, | |
| You have a problem with other equipment. |
| the hum is coming from the rest of your equipment. | |
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| Add them back one piece at a time. The one that causes | ||
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| the system to hum is the source of the hum. | |
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| • | The unit is going into STANDBY mode during the quiet | |
Subwoofer goes into |
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| passages. Try turning the source signal up. On a Dolby | |
STANDBY mode |
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| Digital receiver, turn the SUBWOOFER level up in the | |
while material is |
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| SPEAKER | |
playing. | The source is not providing enough signal. |
| down the volume knob on the subwoofer to compensate. | |
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| • | An alternative is to turn the subwoofer ON/AUTO/OFF | |
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| switch to the ON position. It does not use any more | |
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| power and does not affect reliability. | |
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| • Check that the power cord is plugged in securely at both | ||
| AC power is not getting to the amplifier. |
| ends and make sure that the power outlet the subwoofer | |
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| is plugged into is working. | |
No output from the |
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subwoofer (the LED |
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does not light up). |
| • Check the fuse. The fuse is located on the amplifier, near | ||
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| the power plug. Unplug the power cord and remove the | |
| The amplifier’s fuse is blown. |
| fuse holder with a flat head screwdriver. If the fuse is | |
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| blown, the output transistors are probably damaged. | ||
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| Contact the dealer or | |
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| authorization to send the amplifier back for service. | |
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