Troubleshooting - JBL PSW-D112 Service Manual

Amplifier/Subwoofer
If you used the high-level (speaker) inputs and
there is no sound from any of the speakers, check
the following:
Receiver/amplifier is on and a source is playing.
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Powered subwoofer is plugged in.
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Check all wires and connections between
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receiver/amplifier and speakers. Make sure all wires
are connected. Make sure none of the speaker
wires are frayed, cut or punctured.
Review proper operation of your receiver/amplifier.
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If there is low bass output, check the following:
Make sure the connections to the left and right
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"Speaker Inputs" have the correct polarity (+ and –).
Make sure that the subwoofer is plugged into an
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active electrical outlet.
Adjust the crossover point.
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Flip the Phase Control Switch to the opposite
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position.
If you are using a Dolby* Digital/DTS
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processor, make sure that the subwoofer
adjustments on the receiver/processor are set up
correctly.
Slowly turn the level Control clockwise until you
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begin to hear the desired amount of bass.

TROUBLESHOOTING

If you used the line-level inputs and there is no
sound from the subwoofer, check the following:
Receiver/amplifier is on and a source is playing.
n
Powered subwoofer is plugged in.
n
Check all wires and connections between receiver/
n
amplifier and subwoofer. Make sure all wires are
connected. Make sure none of the wires are frayed,
cut or punctured.
Review proper operation of your receiver/amplifier.
n
Slowly turn the level Control clockwise until you
n
begin to hear the desired amount of bass.
Make sure that you have configured your
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receiver/processor so that the subwoofer/LFE output
is on.
receiver or
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PSW-D112/DPS-12
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