Acoustech Elite PL-300 Panduan Pemilik - Halaman 10

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If you are having a problem with your subwoofer, please read through this "Trouble Shooting Guide". Many times problems

are actually caused by other items in the system or the subwoofer's interaction with those items. These problems can easily

be resolved with this guide.

Problem

1) HUMMING

OR BUZZING

NOISE

2) Subwoofer

thumps when

the system is

being turned

on and off.

3) Subwoofer

goes into

STANDBY

MODE while

material is

playing.

TROUBLESHOOTING GUIDE

Cause

You have a Ground Loop or prob-

lem with other equipment. This

causes the vast majority of hum

related complaints. The electrical

grounds of the components in

your system are not at the same

electrical potential.

You have an amplifier problem.

Your speaker wires or intercon-

nects are the cause.

A light dimmer or other triac

based (SRC) device is on the

same AC circuit.

Noise is being generated by

upstream equipment.

The source is not providing

enough signal.

Solution

A very common ground loop source is cable TV or satel-

lite cabling. Very few installers take the time to ground

the cable to the house ground, causing a 60 Hz hum that

the subwoofer reproduces. Disconnect the coaxial cable

from your TV or cable box. If the hum goes away, the

cable is the cause. In that case contact your cable com-

pany or get an inexpensive 75 ohm ground loop isolator

on line or at a local electronics store. Ground loops can

also come from faulty electrical wiring in your home.

Consult a licensed electrician to evaluate and possibly re-

pair the AC wiring in your home.

• Disconnect all interconnects from the amplifier. If still

hums, call or email technical support.

• It is possible that some cables have a poor or broken

ground due to poor construction, oxidation, or damage.

Also, poorly shielded cables can potentially pick up noise.

Try another cable or speaker wire. Also, move the signal

cable away from AC cables, power transformers, or other

EMI sources.

• Use an AC line filter or plug the unit into a different cir-

cuit.

• When you shut down your equipment, turn off the sub-

woofer first. When powering up, turn on the subwoofer

last.

• The unit is going into STANDBY mode during the quiet

passages. Try turning the source signal up. On a Dolby

Digital receiver, turn the SUBWOOFER level up in the

SPEAKER SET-UP menu. After you turn the signal up, turn

down the volume knob on the subwoofer to compensate.

• An alternative is to turn the subwoofer ON/AUTO/OFF

switch to the ON position. When playing, it does not use

any more power and does not affect reliability.

• Check to see if the crossover through the receiver is set

too low, or if setting crossover from the sub, check to see

if the crossover set through the sub is set too low. This

will greatly reduce the signal going to the sub and hence

make it go into STAND BY MODE.